the beam, i.e. approximately 1m. The A 0mode at low frequencies could therefore be used for the long-range inspection of sandwich structures.
The resonant spectrum method (8)was used here to measure the phase velocity of the A 0Lamb mode for the sandwich specimens.The group velocity was also calculated at various frequencies. The measurements were taken from the specimens having the transducer and receiver on the same side. The dispersion curves for the skin alone were also measured. The results are depicted in Fig. 4.
It can be observed that the dispersion curves obtained for the sandwich beams were very close to those calculated for the skin, in accordance with other studies (6-10). The difference can be attributed to the adhesive because the skin with the adhesive has lower stiffness than the skin alone. The thicker the adhesive layer the bigger the difference (4).
In an earlier paper by the authors artificial debonds of the skin to the core, induced with a sharp knife, were detected using this experi-mental set-up (11). Impact tests were undertaken here to introduce more realistic damage using a 1?54kg, 12?5mm in diameter,hemispherical impactor. The impact point was 200mm from the edge
MIO-16E-1 card together with LabVIEW software by National Instruments UK Ltd. were used to generate the signal, excite the transmitter and subsequently acquire and process the data from the receiver. The inspection strategy described here is shown in Fig. 2.
3.0ANALYSIS OF LAMB WAVE SIGNALS
A beam specimen was cut from the quasi-isotropic laminate for comparison of the wave propagation in the skin to the sandwich specimens. Fig. 3 shows the signals acquired from the skin alone and from the sandwich beams (side 1) at two different frequencies,15kHz and 20kHz, respectively.
It can be observed that no significant changes in the shape or the arrival time of the pulse are introduced by the presence of the foam.However, significant attenuation is present due to energy being dissipated into the core. This allows us to assume that there is leaky Lamb wave propagation (4,7). Although attenuation is greater, the reflection from the far edge of the beam can still be detected, as can be seen in the time traces, after it has travelled twice the length of
Figure 3. Signals received on the skin alone and the sandwich beams at 15kHz (a) and 20kHz (b).
Figure 4. Experimental dispersion curves for the skin alone and the sandwich beams.
15kHz excitation signal. The transmitter and receiver 1 were in line with the impact point. The second receiver 2 was on the opposite skin. The reflection coefficient (R ) of the transmitted signal and the time of flight (ToF) from the excitation are presented in Tables 2 and 3. The time of flight of the input pulse, defined as the time it takes the input pulse to complete a round trip along the length of the specimen (Fig. 3), is altered in the presence of damage. In general,the wave velocity changes in the delaminated area since the wave have to travel through a region of an effective thickness smaller than
the undamaged laminate thickness. In consequence, the frequency-thickness (fh ) product decreases and the phase velocity of the wave varies according to the dispersion curves of the material (Fig. 4). The shape of the dispersion curve of the A 0Lamb wave in the low fh
product region is such that a reduction of the fh product produces a reduction of the phase and group velocities. Therefore, the ToF of an A 0Lamb wave travelling in a specimen with delaminations is greater than that of a wave travelling in the same undamaged specimen. This difference, ?ToF, can be estimated assuming that through the delam-ination, the wave propagates via two sheets of material and that the thickest section is the fastest wave path, which is the one used for calculating the ToF (8, 12).The reflection coefficient (R ) of the transmitted signal and the time of flight (ToF) parameters were monitored for the different stages of damage and reported in Table 2 and Table 3. No consistent trend that relates to the size of damage has been found for the amplitude of the transmitted or reflected wave (R = A R /A I ). However,it can be observed in Fig. 6 that the ToF increases as damage accumulates (by more than 30υs for the specimen with a 15 J impact damage). This gives a clear indication of the extent of damage even for defects that were not detected by X-Ray radiography. It is also clear that detection is achieved by both receivers, due to the way the flexural wave propagates along the sandwich structures. It travels from one skin to the other through the core, thus carrying infor-mation for the whole structure. The location of damage was predicted closely to the true value for all the cases (4-12%difference),
of the beam on side 1 (upper skin). A 75mm length of the specimen
was clamped having the impact point in the centre. The impact tests
were repeated with higher impact energy levels until a significant
amount of damage had developed. The impact area, in generally,
consisted of debonding of the skin from the core, crashed core and
up to 25mm long delaminations in the composite skin.
X-ray Radiography was used as an alternative damage inspection
method. No damage was evident on the X-ray images after 5J impact
in the sR51 specimen. A debond between the skin 1 (upper) and the
core appeared after a 10J impact. Its location ranged from 170mm to
240mm from the instrumented edge of the beam. For the beam with
the sR71 denser foam damage first appeared at higher impact energy
level of 15J. A debond immediately below the impact point was
generated. Cracks developed at the edges of that debond in the core
that propagated through the core and led to debonds on the opposite
skin, Fig. 5(a-c). Delaminated layers could also be seen at the
surface of the top skin. The damage location from the beam clamped
end ranged from 160mm to 230mm.
The two receivers captured the response of the specimens from a
Figure 5. Side view of the sR71 specimen using X-ray
radiography after an impact of (a) 5J, (b) 10J and (c) 15J.
Figure 6. Increase in the TOF observed in the sandwich configuration of the (a) sR51 and (b) sR71 foam core sandwich specimens.
Imp a ct Reflection ToF D a m a ge Reflection ToF D a m a
ge Energy (J )Coefficient*
(ms)Location (mm)
Coefficient (ms)Location (mm)
Receiver 1Receiver 20
0?2430?938–0?2780?997–50?3050?943–0?2871?002–10
0?1370?996
226?7
0?4551?026
213?0
*Note: Reflection coefficient (R ) of the transmitted signal R = A R /A I
Table 2
Effect of impact damage in the response
of the sR51 sandwich specimen
4.0CONCLUDING REMARKS
The generation of low frequency Lamb waves using small and thin piezo-ceramic patches has been presented for the development of an on-line, structural integrity assessment system capable of detecting impact damage in composite sandwich panels. The study offers solution to some of the problems encountered with current Lamb wave generation techniques, where the use of standard ultrasonic probes turn them unsuitable for the development of a built-in, health monitoring system due to their considerable size and shape. The inspection of CFRP panels has been performed producing promising results at excitation frequencies in the low ultrasonic range (<100kHz) where interdigital transducers (IDTs) have certain limitations to operate that restrict their use for the damage inspection of thick structures.
A simple and effective signal processing has been employed for the detection of small changes in the structural response, whose minimal computational demand makes it appropriate for real-time continuous damage monitoring. The A 0Lamb wave propagation in sandwich structures has been examined at low frequencies. No amplifiers were needed to detect the signals, which would be beneficial, if the technique is to be implemented for the continuous monitoring of aircrafts. At least 10% of the amplitude of the excited signal was monitored after 1m of propagation distance, which shows that the technique is applicable for the long-range inspection of sandwich structures. Changes in the response of the propagated pulses have been used to detect and locate low velocity impact damage. Moreover the relatively low sampling frequency required and the simple signal processing reduces the cost and time of the inspection. The technique could be used to inspect damage that is located in any position though the thickness even if only one side is accessible for testing. However, in order to reveal small changes in the signals, the undamaged response is needed for comparison purposes. Also, closely spaced damage areas cannot be separately identified, which is currently under further investigation.
Imp a ct Reflection ToF D a m a ge Reflection ToF D a m a
ge Energy (J )Coefficient
(ms)Location (mm)
Coefficient (ms)Location (mm)
Receiver 1Receiver 20
0?2791?020–0?2701?028–50?2831?026–0?2521?034–100?2941?034–0?2681?042–15
0?2391?053
207?0
0?2971?056
217?5
Table 3
Effect of impact damage in the response of the sR71 sandwich specimen
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Lesson 1 Compression Members New Words 1. achieve achievement 2. eccentricity center, 中心; ec centric 偏心的；ec centricity 偏心，偏心距 3. inevitable evitable 可避免的avoidable; in evitable 不可避免的unavoidable 4. truss 桁架triangular truss, roof truss, truss bridge 5. bracing brace 支柱，支撑；bracing, 支撑，撑杆 6. slender 细长，苗条；stout; slenderness 7. buckle 压曲，屈曲；buckling load 8. stocky stout 9. convincingly convince, convincing, convincingly 10. stub 树桩，短而粗的东西；stub column 短柱 11. curvature 曲率；curve, curvature 12. detractor detract draw or take away; divert; belittle，贬低，诽谤； 13. convince 14. argument dispute, debate, quarrel, reason, 论据（理由） 15. crookedness crook 钩状物，v弯曲，crooked 弯曲的 16. provision 规定，条款 Phrases and Expressions 1. compression member 2. bending moment shear force, axial force 3. call upon (on) 要求，请求，需要 4. critical buckling load 临界屈曲荷载critical 关键的，临界的 5. cross-sectional area 6. radius of gyration 回转半径gyration 7. slenderness ratio 长细比 8. tangent modulus 切线模量 9. stub column 短柱 10. trial-and-error approach 试算法 11. empirical formula 经验公式empirical 经验的 12. residual stress 残余应力residual 13. hot-rolled shape 热轧型钢hot-rolled bar 14. lower bound 下限upper bound 上限 16. effective length 计算长度 Definition （定义） Compression members are those structural elements that are subjected only to axial compressive forces: that is, the loads are applied along a longitudinal axis through the centroid of the member cross section, and
第一部分必须掌握，第二部分尽量掌握 第一部分： 1 Finite Element Method 有限单元法 2 专业英语Specialty English 3 水利工程Hydraulic Engineering 4 土木工程Civil Engineering 5 地下工程Underground Engineering 6 岩土工程Geotechnical Engineering 7 道路工程Road (Highway) Engineering 8 桥梁工程Bridge Engineering 9 隧道工程Tunnel Engineering 10 工程力学Engineering Mechanics 11 交通工程Traffic Engineering 12 港口工程Port Engineering 13 安全性safety 17木结构timber structure 18 砌体结构masonry structure 19 混凝土结构concrete structure 20 钢结构steelstructure 21 钢-混凝土复合结构steel and concrete composite structure 22 素混凝土plain concrete 23 钢筋混凝土reinforced concrete 24 钢筋rebar 25 预应力混凝土pre-stressed concrete 26 静定结构statically determinate structure 27 超静定结构statically indeterminate structure 28 桁架结构truss structure 29 空间网架结构spatial grid structure 30 近海工程offshore engineering 31 静力学statics 32运动学kinematics 33 动力学dynamics 34 简支梁simply supported beam 35 固定支座fixed bearing 36弹性力学elasticity 37 塑性力学plasticity 38 弹塑性力学elaso-plasticity 39 断裂力学fracture Mechanics 40 土力学soil mechanics 41 水力学hydraulics 42 流体力学fluid mechanics 43 固体力学solid mechanics 44 集中力concentrated force 45 压力pressure 46 静水压力hydrostatic pressure 47 均布压力uniform pressure 48 体力body force 49 重力gravity 50 线荷载line load 51 弯矩bending moment 52 torque 扭矩53 应力stress 54 应变stain 55 正应力normal stress 56 剪应力shearing stress 57 主应力principal stress 58 变形deformation 59 内力internal force 60 偏移量挠度deflection 61 settlement 沉降 62 屈曲失稳buckle 63 轴力axial force 64 允许应力allowable stress 65 疲劳分析fatigue analysis 66 梁beam 67 壳shell 68 板plate 69 桥bridge 70 桩pile 71 主动土压力active earth pressure 72 被动土压力passive earth pressure 73 承载力load-bearing capacity 74 水位water Height 75 位移displacement 76 结构力学structural mechanics 77 材料力学material mechanics 78 经纬仪altometer 79 水准仪level 80 学科discipline 81 子学科sub-discipline 82 期刊journal ,periodical 83文献literature 84 ISSN International Standard Serial Number 国际标准刊号 85 ISBN International Standard Book Number 国际标准书号 86 卷volume 87 期number 88 专着monograph 89 会议论文集Proceeding 90 学位论文thesis, dissertation 91 专利patent 92 档案档案室archive 93 国际学术会议conference 94 导师advisor 95 学位论文答辩defense of thesis 96 博士研究生doctorate student 97 研究生postgraduate 98 EI Engineering Index 工程索引 99 SCI Science Citation Index 科学引文索引 100ISTP Index to Science and Technology Proceedings 科学技术会议论文集索引 101 题目title 102 摘要abstract 103 全文full-text 104 参考文献reference 105 联络单位、所属单位affiliation 106 主题词Subject 107 关键字keyword 108 ASCE American Society of Civil Engineers 美国土木工程师协会 109 FHWA Federal Highway Administration 联邦公路总署
Part IV：Commonly Used Professional Terms of Civil Engineering development organization 建设单位 design organization 设计单位 construction organization 施工单位 reinforced concrete 钢筋混凝土 pile 桩 steel structure 钢结构 aluminium alloy 铝合金 masonry 砌体（工程）reinforced ~ 配筋砌体load-bearing ~ 承重砌体unreinforced ~非配筋砌体 permissible stress (allowable stress) 容许应力plywood 胶合板 retaining wall 挡土墙 finish 装修 finishing material装修材料 ventilation 通风 natural ~ 自然通风 mechanical ~ 机械通风 diaphragm wall (continuous concrete wall) 地下连续墙 villa 别墅 moment of inertia 惯性矩 torque 扭矩 stress 应力normal ~ 法向应力shear ~ 剪应力 strain 应变 age hardening 时效硬化 air-conditioning system空调系统 (air) void ration（土）空隙比 albery壁厨，壁龛 a l mery壁厨，贮藏室 anchorage length锚固长度 antiseismic joint 防震缝 architectural appearance 建筑外观 architectural area 建筑面积 architectural design 建筑设计 fiashing 泛水 workability (placeability) 和易性 safety glass安全玻璃 tempered glass (reinforced glass) 钢化玻璃foamed glass泡沫玻璃 asphalt沥青 felt (malthoid) 油毡 riveted connection 铆接 welding焊接 screwed connection 螺栓连接 oakum 麻刀，麻丝 tee三通管 tap存水弯 esthetics美学 formwork 模板（工程） shoring 支撑 batching 配料 slipform construction (slipforming) 滑模施工 lfit-slab construction 升板法施工 mass concrete 大体积混凝土 terrazzo水磨石 construction joint 施工缝 honeycomb蜂窝，空洞，麻面 piled foundation桩基 deep foundation 深基础 shallow foundation浅基础 foundation depth基础埋深 pad foundation独立基础 strip foundation 条形基础 raft foundation筏基 box foundation箱形基础 BSMT=basement 地下室 lift 电梯electric elevator lift well电梯井 escalator 自动扶梯 Poisson’s ratio 泊松比μ Young’s modulus , modulus of elasticity 杨氏模量，弹性模量E safety coefficient 安全系数 fatigue failure 疲劳破坏 bearing capacity of foundations 地基承载力bearing capacity of a pile 单桩承载力 two-way-reinforcement 双向配筋 reinforced concrete two-way slabs钢筋混凝土双向板 single way slab单向板 window blind 窗帘sun blind wind load 风荷载 curing 养护 watertight concrete 防水混凝土 white cement白水泥 separating of concrete混凝土离折segregation of concrete mortar 砂浆~ joint 灰缝 pilaster 壁柱 fire rating耐火等级 fire brick 耐火砖 standard brick标准砖
non-destructive test 非破损检验 non-load—bearingwall 非承重墙 non—uniform cross—section beam 变截面粱 non—uniformly distributed strain coefficient of longitudinal tensile reinforcement 纵向受拉钢筋应变不均匀系数 normal concrete 普通混凝土 normal section 正截面 notch and tooth joint 齿连接 number of sampling 抽样数量 O obligue section 斜截面 oblique—angle fillet weld 斜角角焊缝 one—way reinforced(or prestressed)concrete slab “单向板” open web roof truss 空腹屋架， ordinary concrete 普通混凝土(28) ordinary steel bar 普通钢筋(29) orthogonal fillet weld 直角角焊缝(61) outstanding width of flange 翼缘板外伸宽度(57) outstanding width of stiffener 加劲肋外伸宽度(57) over-all stability reduction coefficient of steel beam·钢梁整体稳定系数(58) overlap 焊瘤(62) overturning or slip resistance analysis 抗倾覆、滑移验算(10) P padding plate 垫板(52) partial penetrated butt weld 不焊透对接焊缝(61) partition 非承重墙(7) penetrated butt weld 透焊对接焊缝(60) percentage of reinforcement 配筋率(34) perforated brick 多孔砖(43) pilastered wall 带壁柱墙(42) pit·凹坑(62) pith 髓心(?o) plain concrete structure 素混凝土结构(24) plane hypothesis 平截面假定(32) plane structure 平面结构(11) plane trussed lattice grids 平面桁架系网架(5) plank 板材(65) plastic adaption coefficient of cross—section 截面塑性发展系数(58) plastic design of steel structure 钢结构塑性设计(56) plastic hinge·塑性铰(13) plastlcity coefficient of reinforced concrete member in tensile zone 受拉区混凝土塑性影响系数
土木工程专业英语原文 及翻译 文档编制序号：[KKIDT-LLE0828-LLETD298-POI08]
08 级土木(1) 班课程考试试卷 考试科目专业英语 考试时间 学生姓名 所在院系土木学院 任课教师 徐州工程学院印制 Stability of Slopes Introduction Translational slips tend to occur where the adjacent stratum is at a relatively shallow depth below the surface of the slope:the failure surface tends to be plane and roughly parallel to the slips usually occur where the adjacent stratum is at greater depth，the failure surface consisting of curved and plane sections． In practice, limiting equilibrium methods are used in the analysis of slope stability. It is considered that failure is on the point of occurring along an assumed or a known failure surface．The shear strength required to maintain a condition of limiting equilibrium is compared with the available shear strength of the soil，giving the average factor of safety along the failure surface．The problem is considered in two dimensions，conditions of plane strain being assumed．It has been shown that a two-dimensional analysis gives a conservative result for a failure on a three-dimensional(dish-shaped) surface． Analysis for the Case of φu =0 This analysis, in terms of total stress，covers the case of a fully saturated clay under undrained conditions, . For the condition immediately after construction．Only moment equilibrium is considered in the analysis．In section, the potential failure surface is assumed to be a circular arc. A trial failure surface(centre O，radius r and length L a where F is the factor of safety with respect to shear strength．Equating moments about O：
A Type Wooden Ladder A字木梯 A-frame A型骨架 A-truss A型构架 Abandon 废弃 Abandoned well 废井 Aberration of needle 磁针偏差Abnormal pressure 异常压力abnormally high pressure 异常高压Abort 中止 abrasion 磨损 Abrasion surface 浪蚀面 abrasive cut-off machine 磨切机Abrasive Cutting Wheel 拮碟abrasive grinding machine 研磨机Abrasive Grinding Wheel 磨碟abrasive particle 磨料颗粒 Absolute address 绝对地址Absolute altitude 绝对高度Absolute damping 绝对阻尼Absolute deviation 绝对偏差Absolute flying height 绝对航高Absolute gravity 绝对重力 absolute permeability 绝对渗透率absolute porosity 绝对孔隙率absolute temperature 绝对温度absorbability 吸收性；吸附性absorption 吸收 abutment 桥墩 abutting end 邻接端 acceleration 加速 acceleration lane 加速车道Acceleration of gravity 重力加速度acceleration pedal 加速器踏板accelerator 催凝剂；加速器；催化剂acceptance criteria 接受准则 access 通路；通道 access door 检修门；通道门access lane 进出路径 access panel 检修门 access point 入口处；出入通道处access ramp 入口坡道；斜通道access road 通路；通道 access shaft 竖井通道 access spiral loop 螺旋式回旋通道access staircase 通道楼梯 access step 出入口踏步 access tunnel 隧道通道 accessible roof 可到达的屋顶accessory 附件；配件accident 事故；意外 accidental collapse 意外坍塌 accommodate 装设；容纳 accredited private laboratory 认可的私 人实验室 accumulator 储压器；蓄电池 accuracy limit 精度限制 acetylene cylinder 乙炔圆筒 Acetylene Hose 煤喉 Acetylene Regulator 煤表 acid plant 酸洗设备；酸洗机 acid pump 酸液泵 acid tank 酸液缸 acidic rock 酸性岩 acoustic couplant 声耦合剂 acoustic coupler 声音藕合器；音效藕 合器 acoustic lining 隔音板 acoustic screen 隔声屏 Acoustic wave 声波 acrylic paint 丙烯漆料(压克力的油漆) acrylic sheet 丙烯胶片(压克力的胶片) active corrosion 活性腐蚀 active earth pressure 主动土压力 active fault 活断层 active oxidation 活性氧化 actual plot ratio 实际地积比率 actuator 促动器；唧筒；激发器 adapt 改装 adaptor 适配器；承接器；转接器； addition 增设；加建 additional building works 增补建筑工 程 additional horizontal force 额外横向力 additional plan 增补图则(附加的平面 图) additional vent 加设通风口 additive 添加剂 Address 地址 adhesive 黏结剂；胶黏剂 adhesive force 附着力 Adhesive Glue 万能胶 Adhesive Reflective Warning Tape 反 光警告贴纸 adit 入口；通路；坑道口 adjacent construction 相邻建造物 adjacent level 相邻水平 adjacent site 相邻基地 adjacent street 相邻街道 adjoining area 毗邻地区 adjoining building 毗邻建筑物 adjoining land 毗邻土地 adjoining structure 毗邻构筑物 adjustable 可调校 Adjustable Wrench Spanner 昔士 adjuster 调节器 adjustment 调校；调整 Administrative Lawsuit 行政诉讼 Administrative Remedy 行政救济 admixture 掺合剂；外加剂 advance directional sign 前置指路标 志；方向预告标志 advance earthworks 前期土方工程 advance warning sign 前置警告标志 advance works 前期工程 aeration 曝气 aeration tank 曝气池 aerial 天线 Aerial mapping 航空测图 aerial photograph 航测照片 Aerial photography 航照定位 aerial rapid transit system 高架快速运 输系统 aerial ropeway 高架缆车系统 aerial view 鸟瞰图 aerofoil 翼型 aerosol 悬浮微粒；喷雾 aerosphere 大气圈 affix 贴附 aftercooler 后冷却器 afterfilter 后过滤器 aftershock 余震 agent 作用剂；代理人 aggradation 堆积 aggregate 骨材；集料；碎石 aggregate area 总面积 aggregate grading 骨材级配 aggregate superficial area 表面总面积 aggregate usable floor space 总楼地板 空间 agitator 搅拌器；搅动机 air bleeding 放气(空气渗出) air blower 鼓风机 air brake 气压制动器 Air chambor 气室 air circuit 空气回路 air circuit breaker 空气断路器 air cleaner 空气滤清器
Take the road of sustainable development civil engineering Abstract: Civil Engineering is the oldest in human history "technical science" as a system of industrial activity, the essence of civil engineering production process, is a technical process Civil engineering is the construction of various facilities in science and technology, collectively, both refer to the construction of the object, that is built on the ground, underground, water facilities, a variety of projects, but also refers to the application of materials, equipment and carried out survey and design , construction, maintenance, repair and other technology. As an important basis for discipline, civil engineering has its important attributes: a comprehensive, social, practical, technical and economic and artistic unity. With the progress of human society and development, civil engineering has already evolved into large-scale comprehensive subject, and has many branches, such as: construction, railroad engineering, road engineering, bridge engineering, specialty engineering structures, water supply and drainage projects, port engineering, hydraulic engineering, environmental engineering and other disciplines. There are six professional civil engineering: architecture, urban planning, civil engineering, built environment and equipment engineering, water supply and drainage works and road and bridge projects. Civil engineering is a form of human activity. Human beings pursued it to change the natural environment for their own benefit. Buildings, transportations, facilities, infrastructures are all included in civil engineering. The development of civil engineering has a long history. Our seniors had left a lot of great constructions to us. For example, Zhao Zhou Bridge is the representative of our Chinese civil engineering masterpieces. It has a history of more than 1300 years and is still service at present. Civil engineering has been so rapid development of the period. A lot of new bridges have been constructed, and many greater plans are under discussion. China is a large county. And she is still well developing. However, civil engineers will be facing more complex problems. We should pay attention to the growing population and a lot of deteriorating infrastructures. We should prepare for the possibility of natural disasters. To meet grow needs in the
土木工程专业英语词汇(整理版) 第一部分必须掌握，第二部分尽量掌握 第一部分： 1 Finite Element Method 有限单元法 2 专业英语 Specialty English 3 水利工程 Hydraulic Engineering 4 土木工程 Civil Engineering 5 地下工程 Underground Engineering 6 岩土工程 Geotechnical Engineering 7 道路工程 Road (Highway) Engineering 8 桥梁工程Bridge Engineering 9 隧道工程 Tunnel Engineering 10 工程力学 Engineering Mechanics 11 交通工程 Traffic Engineering 12 港口工程 Port Engineering 13 安全性 safety 17木结构 timber structure 18 砌体结构 masonry structure 19 混凝土结构concrete structure 20 钢结构 steelstructure 21 钢 - 混凝土复合结构 steel and concrete composite structure 22 素混凝土 plain concrete 23 钢筋混凝土reinforced concrete 24 钢筋 rebar 25 预应力混凝土 pre-stressed concrete 26 静定结构statically determinate structure 27 超静定结构 statically indeterminate structure 28 桁架结构 truss structure 29 空间网架结构 spatial grid structure 30 近海工程 offshore engineering 31 静力学 statics 32运动学kinematics 33 动力学dynamics 34 简支梁 simply supported beam 35 固定支座 fixed bearing 36弹性力学 elasticity 37 塑性力学 plasticity 38 弹塑性力学 elaso-plasticity 39 断裂力学 fracture Mechanics 40 土力学 soil mechanics 41 水力学 hydraulics
第一课土木工程学 土木工程学作为最老的工程技术学科，是指规划，设计，施工及对建筑环境的管理。此处的环境包括建筑符合科学规范的所有结构，从灌溉和排水系统到火箭发射设施。 土木工程师建造道路，桥梁，管道，大坝，海港，发电厂，给排水系统，医院，学校，公共交通和其他现代社会和大量人口集中地区的基础公共设施。他们也建造私有设施，比如飞机场，铁路，管线，摩天大楼，以及其他设计用作工业，商业和住宅途径的大型结构。此外，土木工程师还规划设计及建造完整的城市和乡镇，并且最近一直在规划设计容纳设施齐全的社区的空间平台。 土木一词来源于拉丁文词“公民”。在1782年，英国人John Smeaton为了把他的非军事工程工作区别于当时占优势地位的军事工程师的工作而采用的名词。自从那时起，土木工程学被用于提及从事公共设施建设的工程师，尽管其包含的领域更为广阔。 领域。因为包含范围太广，土木工程学又被细分为大量的技术专业。不同类型的工程需要多种不同土木工程专业技术。一个项目开始的时候，土木工程师要对场地进行测绘，定位有用的布置，如地下水水位，下水道，和电力线。岩土工程专家则进行土力学试验以确定土壤能否承受工程荷载。环境工程专家研究工程对当地的影响，包括对空气和地下水的可能污染，对当地动植物生活的影响，以及如何让工程设计满足政府针对环境保护的需要。交通工程专家确定必需的不同种类设施以减轻由整个工程造成的对当地公路和其他交通网络的负担。同时，结构工程专家利用初步数据对工程作详细规划，设计和说明。从项目开始到结束，对这些土木工程专家的工作进行监督和调配的则是施工管理专家。根据其他专家所提供的信息，施工管理专家计算材料和人工的数量和花费，所有工作的进度表，订购工作所需要的材料和设备，雇佣承包商和分包商，还要做些额外的监督工作以确保工程能按时按质完成。 贯穿任何给定项目，土木工程师都需要大量使用计算机。计算机用于设计工程中使用的多数元件（即计算机辅助设计，或者CAD）并对其进行管理。计算机成为了现代土木工程师的必备品，因为它使得工程师能有效地掌控所需的大量数据从而确定建造一项工程的最佳方法。 结构工程学。在这一专业领域，土木工程师规划设计各种类型的结构，包括桥梁，大坝，发电厂，设备支撑，海面上的特殊结构，美国太空计划，发射塔，庞大的天文和无线电望远镜，以及许多其他种类的项目。结构工程师应用计算机确定一个结构必须承受的力：自重，风荷载和飓风荷载，建筑材料温度变化引起的胀缩，以及地震荷载。他们也需确定不同种材料如钢筋，混凝土，塑料，石头，沥青，砖，铝或其他建筑材料等的复合作用。 水利工程学。土木工程师在这一领域主要处理水的物理控制方面的种种问题。他们的项目用于帮助预防洪水灾害，提供城市用水和灌溉用水，管理控制河流和水流物，维护河滩及其他滨水设施。此外，他们设计和维护海港，运河与水闸，建造大型水利大坝与小型坝，以及各种类型的围堰，帮助设计海上结构并且确定结构的位置对航行影响。 岩土工程学。专业于这个领域的土木工程师对支撑结构并影响结构行为的土壤和岩石的特性进行分析。他们计算建筑和其他结构由于自重压力可能引起的沉降，并采取措施使之减少到最小。他们也需计算并确定如何加强斜坡和填充物的稳定性以及如何保护结构免受地震和地下水的影响。 环境工程学。在这一工程学分支中，土木工程师设计，建造并监视系统以提供安全的饮用水，同时预防和控制地表和地下水资源供给的污染。他们也设计，建造并监视工程以控制甚至消除对土地和空气的污染。
Unite 1 2、Translate the following phrases into Chinese /English . （1）Compression Members 受压构件（2）critical buckling load 临界屈曲荷载 （3）the slenderness ratio 细长比（4）stub column 短柱 （5）reduced modulus 简化模量（6）Effective length 计算长度 （7）Residual stress 残余应力（8）Trial-and-error approach 试算法 （9）Radius of gyration 回转半径（10）Tangent modulus 切线模量 3、Translate the following sentence into Chinese. (1)This ideal state is never achieved in reality, however, and some eccentricity of the load is inevitable. 然而，在现实中,这种理想状态从来没有实现，一些荷载偏心是不可避免的 szbending, and in these cases the member is a beam-column. 在许多情况下，构件同样需要能够抵抗弯矩，在这些情况下，构件被称之为梁柱。 (3)If the member is so slender that the stress just before buckling is below the proportional limit---that is, the member is still elastic---the critical buckling load is given by Q. 如果该构件很细长以至于在压曲前的应力低于比例极限---也就是说，该构件仍然是弹性状态---该构件的该临界屈曲荷载就可以由公式Q给出。 (4)The ratio L/r is the slenderness ratio and is the measure of a compression member’s slenderness, with large values corresponding to slender members. L/r 这一比值是长细比，是受压构件的长细的量度，细长的构件具有较大的值。 (5)If the stress at which buckling occurs is greater than the proportional limit of the material, the relation between stress and strain is not linear, and the modulus of elasticity E can no longer be used. 如果屈曲发生时的应力超过了材料的比例极限，应力与应变之间的关系不再是线性的，弹性模量E不能再使用 (6)If the member is more stocky, as the one in Fig.1.1b, a larger load will be required to bring the member to the point of instability. 如果构件更粗壮，如图Fig.1.1b所示，要把构件到达不稳定点，一个更大的荷载将被要求。 (7)The tips of the flanges, for example, cool at a faster rate than the junction of the flange and the web. This uneven cooling induces stresses that remain permanently. 例如，轮缘的尖部比轮缘的结合部以及中部冷却的速度更快。这种不均匀冷却引起的应力会长久的存在。 (8)In 1947, FRShanley resolved the apparent inconsistencies in the original theory, and today the tangent modulus formula, Eq.1.3, is accepted as the correct one for inelastic buckling. 1947年，FRShanley解决原有理论的表面不相容性，并且切线模量公式，Eq.1.3，被接受作为非弹性屈曲计算的正确公式。 (9)The composite curve, called a column strength curve, completely describes the stability of any column of a given material. 这条复合曲线，被称为柱强度曲线，完全描述了任何一个给定的材料柱的稳定性。 (10)Since it is virtually impossible to construct a frictionless pin connection, even this support condition can only be closely approximated at best. 因为实际上不可能构建一个无摩擦销连接，更不用说这个支撑条件至多只可以尽量近似。