高烈度震区高速铁路简支梁抗震体系研究

发布时间：2018-06-15 13:42

本文选题：高烈度震区 + 高速铁路　；参考：《沈阳建筑大学学报(自然科学版)》2017年05期

【摘要】：目的研究高烈度震区简支梁采用抗震体系对桥梁安全性和经济性的影响,为高烈度震区简支梁抗震设计提供依据.方法以雅万高铁32 m简支梁为例,采用非线性时程分析方法,对比采用延性抗震体系简支梁桥以及采用减隔震体系简支梁桥在抗震性能上的差异.并对两种方案工程造价上的差异进行对比分析.结果采用延性抗震体系的简支梁桥,虽然支座造价略便宜,但桩基长度和配筋均大于减隔震体系的简支梁桥,减隔震体系在造价上更优;同时,采用减隔震体系桥梁在罕遇地震下仅支座锚栓发生剪断,桥梁整体保持弹性,相比抗震性能更优.结论综合造价及抗震性能,推荐高烈度震区高速铁路简支梁桥优先采用减隔震体系.
[Abstract]:Aim to study the effect of seismic system on the safety and economy of simply supported beam in high intensity earthquake area, and to provide the basis for seismic design of simply supported beam in high intensity earthquake area. Methods taking the 32 m simply supported beam of Yawan high-speed railway as an example, the difference of seismic performance between the simple supported beam bridge with ductile seismic system and the simple supported beam bridge with isolation system is compared by using nonlinear time history analysis method. The difference between the cost of the two schemes is compared and analyzed. Results the simply supported beam bridge with ductile aseismic system is cheaper in cost, but the length and reinforcement of pile foundation is larger than that of simple beam bridge with seismic isolation system, and the isolation system is better in cost, at the same time, The bridge with isolation system is shearing only the anchor bolt under rare earthquake, and the whole bridge remains elastic, which is better than the seismic performance. Conclusion considering the cost and seismic performance, it is recommended that the isolation system should be adopted first for high speed railway simply supported beam bridges in high intensity seismic area.
【作者单位】：沈阳建筑大学交通工程学院;河北工业大学土木与交通学院;
【基金】：国家自然科学基金项目(51478074) 辽宁省自然科学基金项目(20170540762) 沈阳建筑大学科学研究项目(2017040)
【分类号】：U442.55

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