论文部分内容阅读
通过变分法及有限元法对简支梁桥剪力滞效应进行对比计算,验证变分法中纵向位移采取三次抛物线的基本假定具有很好的计算精度。并对双T简支梁桥剪力滞的分布规律及不同影响因素进行分析,得出双T简支梁桥沿桥纵向的剪力滞效应分布规律及随各种影响因素变化时的剪力滞效应变化规律。最后对何圩双T梁桥进行变分法有效分布宽度的计算,并同规范中有效分布宽度进行对比分析。
By means of the variational method and the finite element method, the shear lag effect of simple supported girder bridge is compared and verified. The basic assumption of taking the third-order parabola to the longitudinal displacement in the variational method has good calculation accuracy. The distribution law of shear lag and the different influencing factors of double T simply supported girder bridge are analyzed. The distribution law of shear lag effect along the longitudinal direction of double T simply supported girder bridge and the shear force with various factors are obtained Hysteresis effect changes. Finally, the calculation of the effective distribution width of variational method for He-Wei double-T beam bridge is carried out and compared with the effective distribution width in the specification.