考虑梁体—挡块碰撞效应的桥梁地震响应数值计算

Numerical Method for Bridge Seismic Response Considering Beam—Shear Key Pounding Effect

摘要:

地震中桥梁梁体和挡块之间的碰撞是导致挡块破坏的直接因素。为定量研究由碰撞带来的横桥向地震响应的变化,采用Kelvin接触单元模型和SSH法数值计算方法,推导了考虑梁体-挡块碰撞效应的桥梁地震响应的数值计算方法和步骤,并用MATLAB编制了相应程序。通过对比计算结果和有关文献的试验数据可以看到,本文提出的计算方法计算效率高,结果准确。最后通过一个例子说明了本方法的实用性。

Abstract:

The beam-shear key pounding effect is the direct factor to cause shear key of a bridge damage.In order to quantitatively analyze the change of bridge transverse seismic response caused by collision,the Kelvin contact element model and the SSH numerical calculation method are used to derive the numerical calculation method and procedure for bridge transverse seismic response considering the beam-shear key pounding effect.And MATLAB language is used to develop the computer program.According to the comparison of calculational result and test result obtained by reference,it shows that the proposed method is computationally efficient and accurate.A example is given to introduce the practicability of the proposed method.