附有结构“保险丝”构件的桥墩抗震性能试验研究及其应用

发布时间：2018-02-07 13:49

本文关键词： 桥梁工程耗能型桥墩抗震性能试验超大跨斜拉桥结构“保险丝”概念地震损伤控制　出处：《中国公路学报》2014年03期 　论文类型：期刊论文

【摘要】：基于结构"保险丝"概念设计了不同形式桥墩,采用拟静力试验和数值方法研究了此类桥墩的抗震性能及耗能能力,验证了桥墩纤维模型及等效模型的适用性;将试验桥墩原型的纤维和等效模型应用于一座试设计的超大跨斜拉桥纵向地震损伤控制分析中,采用弹塑性方法并引入地震损伤指标评价了耗能型桥墩对桥梁地震损伤的控制效果,结合数值方法和试验结果验证了所提出的地震损伤控制新结构体系的有效性和可行性。结果表明:附有"保险丝"构件的新型耗能桥墩的抗震性能及耗能能力优于传统型独柱式桥墩;采用新型耗能桥墩的损伤控制策略可有效控制主塔损伤,使其满足地震损伤控制目标;桥墩柱间附加的"保险丝"构件不仅可提高桥墩刚度,而且对桥墩具有很好的耗能与保护作用。
[Abstract]:Based on the concept of "fuse", different types of piers are designed. The quasi static test and numerical method are used to study the seismic performance and energy dissipation capacity of this kind of pier, and the applicability of the fiber model and equivalent model of the pier is verified. The fiber and equivalent model of the prototype of experimental pier are applied to the longitudinal seismic damage control analysis of a long-span cable-stayed bridge. In this paper, the elastoplastic method and the seismic damage index are introduced to evaluate the control effect of the energy dissipation pier on the seismic damage of the bridge. Combined with numerical method and experimental results, the effectiveness and feasibility of the proposed new structural system for seismic damage control are verified. The results show that the seismic performance and energy dissipation capacity of the new energy dissipation pier with "fuse" members are excellent. Traditional single-column pier; The damage control strategy of the new energy dissipation pier can effectively control the damage of the main tower and make it meet the goal of seismic damage control, and the additional "fuse" component between the pillars of the pier can not only increase the stiffness of the pier, but also improve the stability of the bridge pier. And the bridge piers have good energy consumption and protection.
【作者单位】：同济大学土木工程防灾国家重点实验室;宁波大学建筑工程与环境学院;
【基金】：国家自然科学基金项目(90915011,91315301)
【分类号】：U443.22;U442.55

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