拱桥计算EXCEL
- 格式:xls
- 大小:24.00 KB
- 文档页数:16
AutoCAD和Excel在拱轴线变形量计算中的应用罗娟1 伍建强2(江西公安专科学校科技系南昌3301031)1(江西省交通科学研究院南昌3300382)2摘要由于拱轴线测量数据庞大,拱轴线变形量计算较为困难,通过在Excel中编辑纵桥向与高程的坐标数据组,在AutoCAD中利用这些数据多点粘贴并连成线,可以快速地完成批量拱轴线,使繁琐的工作变得简单。
关键词AutoCAD Excel 拱轴线变形中图分类号TP393.03 文献标识码A文章编号090908-5148Application on AutoCAD and Excel in theDeformation Calculation of Arch AxisLuo Juan1 Wu Jianqiang2(Jiangxi Science and Technology Department of Public SecurityCollege Nanchang 3301031)1(Transportation Research Institute of Jiangxi Province2 Nanchang 3300382)2Abstract As the arch axis measurements of a large,arch axis deformation calculation is more difficult,by the bridge to Excel,edit the longitudinal coordinates and elevation data sets,the use of these data in the AutoCAD paste and connected into a multi-point line,it can quickly complete the bulk arch axis,so that it makes the cumbersome task easyily.Keywords AutoCAD Excel Deformation of arch axis在桥梁长期运营期间,由于频繁承受荷载,甚至超载;再加上自然界乃至自然灾害的侵袭(如地震、洪水),会造成桥梁损伤或局部破坏,而拱桥中的拱轴线变形是桥梁病害检测内容之一。
拱圈内半径R 0 =(B 2+4f 02)/8f 0半圆心角θ按下式计算:tan -1θ=B/(2(R 计算跨径:L=L 0+dsin θ计算矢高:f=f 0+d/2-d/2*cos θ计算矢跨比:f/L1拱函为例进行计算,该涵洞顶部填土最大高度H=2.855m,拱圈等效为等1作用于拱圈的均布垂直土压力:q 1=a γg γH d =420.0KN/m2作用于拱圈的水平均布荷载:q 2=a γt γH d tan 2(45-φ/2)=160.0KN/m3作用于拱圈的水平三角形荷载最大强度:q 3=a γt γh tan 2(45-φ/2)=11.718 KN/m 4作用于拱背的填充料重力:W 1=0.03γg γ1L 2=17.86 KN 5拱圈自重:W 2=0.57γg γdL=32.85 KN 6汽车荷载其中,重力系数查截面无铰圆拱内力系数表得到。
荷载类型及数值内力名称系数VA(KN)0.5垂直均布荷载HA、NC(KN)0.63782(KN/m)MA(KN/m)0.00414162.5608MC(KN/m)0.00158VA(KN)1拱背填料土重HA、NC(KN)0.55637(KN)MA(KN/m)-0.0220693.80269939MC(KN/m)-0.01033VA(KN)0均布水平荷载HA(KN)-0.56746(KN/m)MA(KN/m)-0.0223724.05333333NC(KN)MC(KN/m)-0.01317VA(KN)0均布三角形荷载HA(KN)-0.75857(KN/m)MA(KN/m)-0.03795序号27.06NC(KN)MC(KN/m)-0.01038VA(KN)1自重力HA、NC(KN) 1.20645(KN)MA(KN/m)0.00582457.7937546MC(KN/m)0.0019822拱脚截面轴力N A=H A cosθ+V A sinθ=1435.9偏心距e0=∑M A/∑N A= 0.037 m塑性影响系数K=1+1.5e0/y=弯曲压应力σa=∑N/A+∑M/W= 4140.763 KN/m2允许弯曲压应力K[σa]= 14528.795 KN/m2σa< K[σa],截面受压满足要求。