地震作用下梁式桥碰撞反应分析

在考虑梁间碰撞反应和桥梁结构非线性特性的基础上,建立全桥模型,通过不同桥墩高度和截面刚度简支梁桥在不同地震激励下的时程响应分析,对橡胶支座隔震的简支梁桥体系在地震作用下梁间碰撞响应规律和特点进行研究。结果表明,碰撞在一定程度上显著改变结构的响应状态,增大墩底弯矩和剪力;桥墩的高度、截面刚度以及地震激励的变化会对梁间碰撞产生影响。

Pounding Response Analysis of Simply-supported Beam Type Bridge under Earthquake Action

With full consideration of the response of the pounding between neighboring beams and the non-linear characteristics and mutual influence, a full bridge model was built. By changing the height of the bridge pier, its cross-sectional stiffness and inputting different levels of seismic excitation, the time history of the simply-supported beam bridge was analyzed, and the pounding response rule and characteristics under the seismic excitation of the simply-supported beam bridge with robber seismic insulation supports discussed. The study concluded that the pounding changed the responding status of the structure to a certain extent, increased the bending torque and shear force of the pier bottom, and that the pier height, cross-section stiffness and seismic excitation would affect the pounding of the neighboring segments.