H型斜拉桥桥塔横桥向结构抗震设计与分析

发布时间：2018-02-26 12:24

本文关键词： 斜拉桥桥塔横桥向抗震分析抗震设计　出处：《土木建筑与环境工程》2014年06期 　论文类型：期刊论文

【摘要】：在工程实际中,通常需要在满足静力需求的基础上大幅提高塔底和横梁截面的配筋率来满足斜拉桥桥塔在罕遇地震作用下既定的性能目标,这种做法不仅不够经济,同时也增加了下部桩基础的抗震需求。通过对H型桥塔斜拉桥桥塔结构设计参数进行研究,探讨了斜拉桥桥塔上横梁位置、塔柱-横梁刚度比、上横梁与塔柱的约束条件以及桥塔上横梁进入塑性的程度对斜拉桥桥塔横桥向地震响应的影响。结果表明:斜拉桥桥塔上横梁位置变化、横梁刚度变化以及考虑上横梁的屈服耗能均能改变桥塔横桥向的地震响应,但结果并不显著,而改变上横梁与塔柱的约束条件能显著降低桥塔的横桥向地震需求。
[Abstract]:In engineering practice, usually need to meet the demand of a substantial increase in the basis of the static reinforcement at the bottom of the tower and the cross section of the beam rate to meet the performance goals established in the tower under earthquake in Abraham cable-stayed bridge, this approach is not only economic, but also increase the lower pile foundation seismic demand. Based on the research of H type tower of cable-stayed bridge pylon structure design parameters of beam position of Pylon of cable-stayed bridge, pylon - beam stiffness ratio, the constraints on the beam and the tower and the tower beam into the plastic on the pylon of cable-stayed bridge cross bridge response to the earthquake. The results show that the influence of cable-stayed beam to change the position of bridge, the seismic response of stiffness of the beam and considering yielding upper beam can change the pylon transverse to the bridge, but the result is not significant, and the change of constraints can significantly reduce the beam and pylon tower cross The bridge needs the earthquake.

【作者单位】：同济大学土木工程防灾国家重点实验室;江苏省交通规划设计院股份有限公司;
【基金】：973计划项目(2013CB036302) 国家自然科学基金(51478338)
【分类号】：U442.55;U448.27

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