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中文摘要：
以一座三联连续梁桥为原型，建立考虑橡胶伸缩缝弹性刚度的简化动力分析模型，研究了伸缩缝弹性刚度对结构动力特性的影响；并采用线性时程分析方法在四类不同场地条件下研究了伸缩缝刚度变化对结构地震反应的影响。研究结果表明，橡胶伸缩缝弹性刚度增加能有效限制由相邻联相向运动产生的纵向相对位移从而防止碰撞，伸缩缝刚度在一定范围内变化可以减小墩、梁相对位移，但是可能对固定墩的剪力、弯矩带来不利影响。
英文摘要：
In this paper,a three-span continuous beam bridge was presented as a simplified analytical model that considered the effects of stiffness of expansion joints and the dynamic characteristics of the bridge with dif-ferent stiffness of expansion joints were studied.With the linear time history analysis method,the influences of different stiffness of elastic expansion joints on seismic response of continuous beam bridge under four kinds of construction condition of site were investigated.The results from the present study indicate that as the stiffness of expansion joints increasing the relative displacements between adjacent beam ends were decreased,and with the consideration of elastic expansion joints the relative displacements between pier top and beam could be de-creased under different construction of site,while it might give rise to an increase of the shearing force and bending moment under some kinds of construction condition of site.
同期刊论文项目
同项目期刊论文
Experimental Studies on Seismic Performance of Subsidiary Piers of Long-Span Cable-Stayed Bridge wit
Study on Dynamic Characteristics of Long Span Continuous Bridge from Construction to Completion Cons
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