基于影响线的简支T型梁桥上部结构损伤识别研究

Research on damage identification of upper structure of simply supported T beam bridge based on influence line

根据荷载横向分布系数和虚功原理,推导出了影响线挠度差影响线和挠度差二阶导数的解析解用于简支T型梁桥的损伤识别。为验证推论的合理性,利用梁格法模拟建立了一座横向由六片T梁组成的简支梁桥,并对其中三片梁的损伤进行了识别研究。

According to the transverse load distribution factors and virtual work principle,the deflection difference of influence line and the two derivative formulas of deflection difference were deduced for damage identification of T beams. The rationality of this formula is verified by using grillage method to establish a simply - supported t beam bridge transversely consisting of six pieces of T beams,and the damage identification of three pieces of T beams was studied.