采用新型辅助墩的超大跨斜拉桥顺桥向损伤控制新体系研究
发布时间：2018-10-11 08:28
【摘要】：以一座试设计斜拉桥为例,采用动力弹塑性时程分析并以Park损伤指数、位移作为评价指标,研究采用辅助墩的斜拉桥顺桥向结构体系的抗震性能,并探讨不同型式桥墩对其抗震性能和损伤控制效果的影响。结果表明:采用新型辅助墩的超大跨斜拉桥顺桥向结构体系具有更好的抗震性能和损伤控制效果,且具有分层耗能机制,即附加的耗能构件可有效减缓辅助墩的地震损伤,辅助墩又可有效减缓主塔的地震损伤;附有剪切连杆的新型桥墩的抗震性能优于传统型桥墩,剪切连杆不仅可提高桥墩的刚度,而且可有效减小其地震损伤,起附加耗能作用。
[Abstract]:Taking an experimental cable-stayed bridge as an example, using dynamic elastic-plastic time-history analysis, Park damage index and displacement as the evaluation index, the seismic behavior of a cable-stayed bridge with auxiliary piers is studied. The effects of different types of piers on seismic performance and damage control are discussed. The results show that the long-span cable-stayed bridge system with new auxiliary piers has better seismic performance and damage control effect, and has a layered energy dissipation mechanism, that is, additional energy-dissipation components can effectively reduce the seismic damage of auxiliary piers. The seismic performance of the new pier with shear connecting rod is better than that of the traditional pier. The shear connecting rod can not only improve the stiffness of pier, but also reduce the seismic damage effectively and play the role of additional energy dissipation.
【作者单位】： 宁波大学;同济大学土木工程防灾国家重点实验室;
【基金】：国家自然科学基金(91315301) 宁波大学人才工程项目(ZX2014000207)
【分类号】：U442.55;U448.27
[Abstract]:Taking an experimental cable-stayed bridge as an example, using dynamic elastic-plastic time-history analysis, Park damage index and displacement as the evaluation index, the seismic behavior of a cable-stayed bridge with auxiliary piers is studied. The effects of different types of piers on seismic performance and damage control are discussed. The results show that the long-span cable-stayed bridge system with new auxiliary piers has better seismic performance and damage control effect, and has a layered energy dissipation mechanism, that is, additional energy-dissipation components can effectively reduce the seismic damage of auxiliary piers. The seismic performance of the new pier with shear connecting rod is better than that of the traditional pier. The shear connecting rod can not only improve the stiffness of pier, but also reduce the seismic damage effectively and play the role of additional energy dissipation.
【作者单位】： 宁波大学;同济大学土木工程防灾国家重点实验室;
【基金】：国家自然科学基金(91315301) 宁波大学人才工程项目(ZX2014000207)
【分类号】：U442.55;U448.27
【参考文献】
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1 陈永祁;马良U，
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