The

姓名：徐惠东学号：1252253022 学院：欧亚国际学院The frame structure anti- earthquake concept designThe disaster has an earthquake dashing forward sending out nature, may forecast nature very low s o far, bring about loss for human society is that the natural disaster of all kinds is hit by one of the gravest disaster gravely. In the light of now available our country science level and economy condi tion, correct the target building seismic resistance having brought forward "three standards " fortifi cation, be that generally, the what be spoken "small earthquake shocks does not but constructs in t he dirty trick, big earthquakes do not fall ". That generally, what be talked small shocks in the eart hquake, big earthquakes refer to respectively is intensity exceed probability in 50 fortifying for 3 %'s 63% , 10% , 2 ~ being more is caught in an earthquake, earthquake , rare Yu earthquake.Since building the astigmatic design complexity, in actual project, anti-knock conceptual design ap pears especially important right away. It includes the following content mainly: Architectural desi gn should pay attention to the architectural systematic ness; Choose rational building structure syst em; the tensile resisting inclining force structure and the component is designed.That the ability designs law is the main content that the structure denasality designs includes stand ard our country internal force adjustment and structure two aspect. It is twenty centuries seventies later stage , reinforced concrete structure brought forward by famous New Zealand scholar T.Paula y and Park has sufficient tonsillitis method under the force designing an earthquake chooses value is prejudiced low situationW.hose core thought is: "The beam cuts organization " or "the beam col umn cuts organization " by the fact that "the strong weak post beam " guides structure to take form ; Avoid structure by "strong weak scissors turn " before reach estimate that shearing happened in t he denasality in the ability front destroy; Turn an ability and consume an ability by the fact that ne cessary structure measure makes the location may form the plasticity hinge have the necessary pla sticity. Make structure have the necessary tonsillitis from all above three aspect guarantee. That fra med structure is the common structure form, whose senility certainly designs that, is to embody fr om about this three aspect also mainly. 1, Strong pillar weak beamDriving force reaction analysis indicates structure; architectural deformability is connected with to destroying mechanism. Common have three kinds model’s consume energy organization ", beam hinge organization ““, post hinge organization ““, beam column hinge organization "."Beam hinge organization " and "beam column hinge organization " Lang Xian knuckle under , may let the entire frame have distribution and energy consumption hea vierthan big internal forces ability, limit tier displacement is big , plasticity hinge quantity is many , the hinge does not lose efficacy but the structure entirety does not lose efficacy because of indivi dual plasticity. The as a result anti-knock function is easy to be that the armored concrete is ideal c onsume energy organization. Being that our country norm adopts allows a pillar , the shearing forc e wall puts up the hinge beam column hinge scheme, taking place adopting "strong relative weak p ost beam " measure , postponing a pillar cuts time. Weak tier of post hinge organization possibility appear on unable complete trouble shooting but , require that the axis pressure restricting a pillar compares as a result, architectural weakness prevents necessary time from appearing tier by the fa ct that Cheng analysis law judges now and then, post hinge organization.Are that V. I. P. is to enhance the pillar bending resistance , guidance holds in the beam appear first , the plasticity cuts our "strong common weak post beam " adjustment measure. Before plasticity h inge appearing on structure, structure component Yin La District concrete dehiscence and pressur e area concrete mistake elasticity character, every component stiffness reduces a reinforced bar wil l do with the cementation degeneration between the concrete. That stiffness reduces a beam is relat ively graver than accepting the pillar pressing on , structure enhances from initial shearing type de formation to curved scissors shape deformation transition , curved post inner regulation proportion really more curved than beam; The at the same time architectural period is lengthened, size affecti ng the participation modulus shaking a type respectively to structure's; Change happened in the ea rthquake force modulus , lead to the part pillar bend regulation enhancing, feasible beam reality kn uckles under intensity rise , the post inner bends regulation when plasticity hinge appearing on the reby feasible beam enhancing since structure cause and the people who designs the middle reinfor ced bar's are to enhance.. And after plasticity hinge appearing on structure, same existence having above-mentioned cause, structure knuckles under mistake elasticity in the day after tomorrow proc ess being that process , post that the earthquake enhances strenuously further bend regulation enha ncing with earthquake force but enhance. The force arouses an earthquake overturn force moment having changed the actual post inner axis force. We knuckle under the ability lessening than axis p ressure in standardizing being limited to be able to ensure that the pillar also can lead to a pillar in big the bias voltage range inner , axis force diminution like value. The anti-knock norm is stipulate d: Except that the frame top storey and post axis pressure are compared to the strut beam and fram e pillar being smaller than 0.15 person and frame, post holds curved regulation designing that valu e should accord with difference being ∑∑=Mb c Mc η，c η that first order takes 1.4 , the two stagetakes 1.2 , grade-three takes 1.1. 9 degree and one step of framed structure still responds to coincid ence,∑∑=Mbua Mc 2.1.Mbuaintensity standard valueascertains that according to matching reinforced bar area and material really. The bottom post axis is strenuously big, the ability that the plasticity rotates dispatches, be that pressure collapses after a voiding a foot stall producing a hinge, one, two, three steps of framed structure bottom, post holds cross section constituting curved regulation designing that value takes advantage of that 1.5, 1.25 compose in reply 1.15 in order to enhancing a modulus respectively. Combination of the corner po st adjustment queen bends regulation still should take advantage of that not to be smaller than 1.10's modular. Curved regulation designs that value carries out adjustment to one-level anti-knock gra de shearing force wall limb cross section combination , force the plasticity hinge to appear to reinf orce location in the wall limb bottom, the bottom reinforces location and all above layer of curved regulation designing that value takes wall limb bottom cross section constituting curved regulation designing value , other location multiplies 1.2's by to enhance a modulus. Prop up anti-knock wall structure to part frame, bottom-end , whose curved combination regulation design value respond t o one, two steps of frame pillars post upper end and bottom post take advantage of that 1.5 compo ses in reply 1.25 in order to enhancing a modulus respectively. All above "strong weak post beam” adjustment measure, reaction analysis indicates , big satisfied fundamental earthquakes demand no upside down course nonlinearity driving force. Reinforced bar spending area, the beam in 7 is controlled from gravity load, the post reinforced bar matches ’ tendon rates basically from the mi nimum under the control of. Have enhanced post Liana Xiang all round resisting the curved ability . At the same time, 7 degree of area exactly curved regulation plasticity hinge appears on disaster very much, plays arrive at advantageous role to fighting against big earthquakes. In 9 degree of are a, adopt reality to match reinforced bar area and material bending regulation within intensity stand ard value calculation post, structural beam reinforced bar enhancing same lead to enhancing bendi ng regulation within post designing value, under importing in many waves, the beam holds the pla sticity hinge rotating developing greatly, more sufficient, post holds the plasticity hinge developin g insufficiency, rotate less. Design demand with the beam. Reaction and 9 degree are about the sa me to 8 degree of area , whose big earthquake displacement , that post holds the plasticity hinge is bigger than rotating 9 degree much but, the beam holds the plasticity hinge appearing sufficient bu t rotate small, as a result "strong weak post beam " effect is not obvious , curved regulation enhanc es a modulus ought to take 1.35 , this waits for improving and perfecting going a step further when the grade suggesting that 8 degree of two stage is anti-knock in connection with the expert. 2, Strong shear weak curved"Strong weak scissors turn ” is that the plasticity cuts cross section for guarantee on reach anticip ate that shearing happened in the mistake elastic-deformation prior to destroy. As far as common st ructure be concerned, main behaviors holds in the beam, post holds, the shearing force wall botto m reinforces area , shearing force wall entrance to a cave company beam tools , beam column nod e core area. Show mainly with being not that seismic resistance is compared with each other, stren gthening measure in improving the effect shearing force; Aspect adjusting a shear bearing the wei ght of two forces.1) effect shearing forceOne, two, three-level frame beam and anti-knock wall middle stride over high ratio greater than2.5 company beam, shearing force design value among them G b n r b l b V l M M vb V ++=/)(η.Gb ηfirst order choose 1.3, two stage choose 1.2, three-level choose 1.1, first order framed structur e and 9 Due Shan respond to coincidence. Coincidence G b n r bva l bva V l M M V ++=/)(1.1 one, two, three steps of frame post and frame pillar , shearing force being designed being worth vc ηtaking 1.4 among them, one step , taking 1.2, three steps of take 1.1 , one-level framed structur e and 9 Due Shank two steps responding to.Hn M M V tcva b cva /)(2.1+=.One, two, threesteps of anti-knock walls bottom reinforces location the shearing force designs that value is among w vw V V η= then vb ηfirst order takes 1.6 , the two stage takes 1.4 , grade-three takes 1.2, 9 Dud Shank respond to coincidence w w wva M V M V /1.1= .The node core area seismic resistance the beam column node , one, two steps of anti-knock grades are carried out is born the weight of forcechecking calculation by the scissors , should accord with anti-knock structure measure about 3 ste p, correct 9 degree of fortify and one-level anti-knock grade framed structure, think to the beam en d the plasticity hinge already appears , the node shearing force holds reality completely from the b eam knuckling under curved regulation decision , hold reality according to the beam matching rein forced bar covering an area of the growing modulus that intensity standard value calculation, takes advantage of that at the same time with 1.15 with material. Other first order holds curved regulati on according to the beam designing that value secretly schemes against , the shearing force enhan ces a modulus being 1.35 , the two stage is 1.2.2) Shear formulaThe continuous beam of armored concrete and the cantilever beam are born the weight of at home and abroad under low repeated cycle load effect by the scissors the force experiment indicates the main cause pooling efforts and reducing even if tendon dowel force lessening is that the beam is b orn the weight of a force by the scissors, concrete scissors pressure area lessening shearing an inte nsity, tilted rift room aggregate bite. Scissors bear the weight of a norm to the concrete accepting d escending strenuously being 60% be not anti-knock, the reinforced bar item does not reduce. By th e same token, the experiment indicates to insisting to intimidate post with that the force is born the weight of by the scissors, loading makes post the force be born the weight of by the scissors reduc ing 10% ~ again and again 30%, the item arouses , adopts practice identical with the beam mainly from the concrete. The experiment is indicated to shearing force wall, whose repeated loading brea ks the subtraction modulus up than monotony increases be loaded with force lessening is born the weight of by the scissors 15% ~ 20%, adopts to be not that seismic resistance is born the weight of by the scissors energy times 0.8's. Two parts accept the pressure pole strenuously tilted from the c oncrete is born the weight of by the scissors and horizontal stirrup of beam column node seismic r esistance cutting the expert who bears the weight of force composition , is connected with have gi ven a relevance out formula.Tilted for preventing the beam , post , company beam , shearing force wall , node from happening pressure is destroyed, we have stipulated upper limits force upper limit to be born the weight of by the scissors , have stipulated to match hoop rate’s namely to accepting scissors cross section.Reaction analysis indicates strong weak curved scissors requests; all above measure satisfies basic ally by mistake elasticity driving force. The plasticity rotates because of anti-knock grade of two st age beam column under big earthquakes still very big , suggest that the shearing force enhances a modulus is bigger than having there is difference between one step unsuitably in connection with t he expert, to the beam choose 1.25 is fairly good , ought to take 1.3 ~ to post 1.35. It's the rationali ty taking value remains to be improved and perfected in going a step further.Require that explanatory being , the beam column node accept a force very complicated , need to e nsure that beam column reinforced bar reliability in the node is anchoring , hold occurrence bendi ng resistance at the same time in the beam column destroying front, shearing happened in the node destroy, whose essence should belong to "strong weak curved scissors" categories. The node carri es out adjustment on one, two steps of anti-knock grades shearing force and, only, the person enha nces a modulus be are minor than post, ratio post also holds structure measure a little weak. As a result ", more strong node “statement, is not worth it encourage.3) Structure measureStructure measure is a beam, post, the shearing force wall plasticity cuts the guarantee that area as ks to reach the plasticity that reality needs turning ability and consuming ability. Its "strong with "s trong weak scissors turn ", weak post beam " correlates, a architectural denasality of guarantee.”Strong weak scissors turn " is a prerequisite for ensuring that the plasticity hinge turns an ability a nd consumes an ability; Strict "strong weak post beam " degree, the measure affecting correspondi ng structure, if put strict "strong weak post beam " into practice, ensure that the pillar does not app ear than the plasticity hinge, corresponding axis pressure waiting for structure measure to should b e a little loose right away except the bottom. Our country adopts "the strong relative weak post bea m”, delays a pillar going beyond the hinge time, therefore needing to adopt stricter structure mea sure.① the beam structure measure beam plasticity hinge cross section senility and many factors ma tch tendon rates and the rise knuckling under an intensity but reduce in connection with cross secti on tensile, with the reinforced bar being pulled; The reinforced bar matches tendon rates and concr ete intensity rise but improve with being pressed on, width enhances but enhances with cross secti on; Plasticity hinge area stirrup can guard against the pressure injustice releasing a tendon , impro ve concrete limit pressure strain , arrest tilted rift carrying out , fight against a shearing force , plas ticity hinge deformation and consume an ability bring into full play, That deck-molding is stridden over is smaller than exceeding , shearing deformation proportion is increasingly big, the gentility destroying , using the tilted rift easy to happen reduces. The beam has led low even if the tendon matches hoop, the reinforced bar may knuckle under after Lang Kai cracks break up by pulling ev en. As a result, the norm matches tendon rates to the beam even if the tendon maximum matches te ndon rates and minimum , the stirrup encryption District length , maximal spacing , minimal diam eter , maximal limb lead all have strict regulations from when, volume matches hoop. Being bendi ng regulation , the guarantee cross section denasality , holding to the beam possibly for the end fig hting against a beam to pull the pressure reinforced bar area ratio make restrict. Stride over height at the same time, to minimal beam width, than, aspect ratio has done regulation.② the post structure measureFor post bending a type accepting the force component, axis pressure than to the denasality and consuming to be able to, nature effect is bigger. Destroy axis pressure than big bias voltages happ ened in the pillar hour, component deformation is big , gentility energy nature easy to only consum e, reduces; Nature is growing with axis pressure than enhancing , consuming an energy, but the ge ntility sudden drop, moreover the stirrup diminishes to the gentility help. Readjust oneself to a cert ain extent to adopt the pillar, main guarantee it's tonsillitis that the low earthquake designs strenuo usly, but consuming energy sex to second. The pressure ratio has made a norm to the axis restrictin g, can ensure that within big bias voltages range in general. Stirrup same get the strain arriving at big roles, restraining the longitudinal tendon, improving concrete pressure, deter the tilted rift fro m developing also to the denasality. Be to match tendon symmetrically like post, the person leads f eeling bigger , as big , becoming deformed when the pillar knuckles under more even if the tendon matches tendon , the tensile finishes exceeding. As a result, the tendon minimum matches tendonrates, the stirrup encryption District length, maximal spacing, minimal diameter, maximal limb lea d having made strict regulations out from when, and volume matches hoop to the pillar jumping. A t the same time, aspect ratio , scissors to the pillar have stridden over a ratio , minimal altitude of c ross section , width have done out regulation, to improve the anti-knock function.③ Node structure measureThe node is anchoring beam column reinforced bar area, effect is very big to structure function. B e under swear to act on earthquake and the vertical stroke to load, area provides necessary constrai nt to node core when node core area cuts pressure low than slanting, keep the node fundamental sh ear ability under disadvantageous condition, make a beam column anchoring even if the tendon is reliable, match hoop rates to node core area maximal spacing of stirrup, minimal diameter, volume having done out regulation. The beam column is main node structure measure content even if ten don reliability in the node is anchoring. Have standardized to beam tendon being hit by the node di ameter; Release the anchoring length of tendon to the beam column; anchoring way all has detaile d regulation.To sum up ,; Framed structure is to pass "the design plan calculating and coming realize structure measure the ability running after beam hinge organization" mainly thereby, realize "the small earth —quake shocks does not but constructs in the dirty trick, big earthquakes do not fall " three standard s to-en fortifying target's. References.框架结构抗震设计地震灾害具有突发性，至今可预报性很低，给人类社会造成的损失严重，是各类自然灾中最严重的灾害之一。