多塔斜拉桥地震作用简化分析方法

发布时间：2018-05-16 05:18

本文选题：多塔斜拉桥 + 对称结构　；参考：《地震工程与工程振动》2016年05期

【摘要】：多塔斜拉桥多为对称结构,受实验室规模及振动台台组数的限制,大型多塔斜拉桥的大比例尺全桥多振动台试验无法进行,需要提出合理有效的简化分析方法:采用类似于静力学中的方法取反对称半结构,然后进行纵桥向一致地震激励。本文以南昌朝阳大桥(六塔斜拉桥)为工程实例验证动力荷载作用下非线性体系半结构简化的合理性,通过对比全、半桥结构计算得到的支座位移、墩底内力和主梁位移,发现半结构与全结构具有相同的计算精度。该简化方法为实现多塔斜拉桥大比例尺简化振动台试验提供了理论依据。
[Abstract]:The multi-tower cable-stayed bridges are mostly symmetrical structures. Limited by the scale of the laboratory and the number of shaking table groups, the large scale multi-bridge multi-shaking table tests of large multi-tower cable-stayed bridges cannot be carried out. It is necessary to put forward a reasonable and effective simplified analysis method: the antisymmetric half-structure is obtained by using a method similar to that in statics, and then the longitudinal and bridge uniform seismic excitation is carried out. Taking the Chaoyang Bridge (six-tower cable-stayed bridge) in Nanchang as an engineering example, this paper verifies the rationality of the simplified semi-structure of nonlinear system under dynamic load. The supported displacement, the internal force at the bottom of the pier and the displacement of the main beam are calculated by comparing the structure of the full-bridge and half-bridge. It is found that the half-structure has the same calculation accuracy as the whole structure. The simplified method provides a theoretical basis for large scale simplified shaking table test of multi-tower cable-stayed bridge.
【作者单位】：同济大学土木工程防灾国家重点实验室;上海市城市建设设计研究总院;
【基金】：土木工程防灾国家重点实验室基金资助项目(SLDRCE14-B-14) 国家自然科学基金资助项目(51478339,51278376,91315301) 江西省科技计划项目(20151BBG70064) 国家科技支撑计划课题(2015BAK17B04)~~
【分类号】：U448.27

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