摘要
该文在考虑连续梁桥滑动支座墩滑动摩擦效应的基础上,求出了全桥纵桥向的等效周期和等效阻尼比,将连续梁桥在纵桥向等效为单自由度体系。根据单自由度体系在地震作用下位移需求的计算方法,提出了连续梁桥在地震作用下位移需求的简化方法。最后给出了该方法的算例,并采用非线性时程分析进行了检验,结果表明简化方法有效。
On the basis of considering the gliding friction effect of continuous beam bridge gliding abutment pier,the article seeks the longitudinally equivalent cycle and equivalent damp ratio of the whole bridge,and makes the continuous beam bridge being the one degree of freedom system at the longitudinal effect of bridge.Based on the calculation method of displacement demand for one degree of freedom system under the earthquake action,the article puts forward the simplifying method of displacement demand for the continuous beam bridge under earthquake action,and finally gives the example of this method,and uses the non-linear time-history analysis to carry out the inspection. The result makes clear that the simplifying method is effective.
出处
《城市道桥与防洪》
2010年第3期127-131,共5页
Urban Roads Bridges & Flood Control
关键词
连续梁桥
地震响应
等效体系
位移需求
continuous beam bridge
earthquake response
equivalent system
displacement demand
