跨断层隧道抗减震措施性能振动台试验研究

发布时间：2018-06-05 07:26

本文选题：隧道工程 + 振动台模型试验　；参考：《岩土工程学报》2014年08期

【摘要】：跨断层的隧道工程在中国高烈度地震区已经越来越普遍。针对目前土木工程抗震设计规范对跨断层隧道的不适用性,通过振动台模型试验研究了隧道结构常规与新型抗减震措施在地震动力荷载作用下的响应特性和破坏机理。结果表明:断层滑动装置在单体模型箱中模拟断层滑动状况良好;套管式可变形结构的抗减震性能最好;减震层可以提高隧道结构整体的耐震性能;减震缝通过提高隧道结构纵向自由度而减轻震害。分析了隧道结构在地震中发生破坏的初始位置与破坏过程,揭示了各种抗减震措施的作用机理。最后,将地震烈度与隧道结构破坏过程相结合,提出了各种抗减震措施的适用条件。为研发新型隧道抗减震措施与隧道抗震设防提供参考。
[Abstract]:Cross-fault tunnel engineering has become more and more common in high-intensity earthquake areas in China. In view of the inapplicability of seismic design code for civil engineering to cross-fault tunnel at present, the response characteristics and failure mechanism of tunnel structure under seismic dynamic load are studied by shaking table model test. The results show that the fault sliding device simulates the fault sliding condition in the single model box, the casing deformable structure has the best anti-seismic performance, and the damping layer can improve the overall seismic resistance of the tunnel structure. The seismic damage is alleviated by increasing the longitudinal degree of freedom of the tunnel structure. The initial position and failure process of tunnel structure in earthquake are analyzed, and the mechanism of various anti-seismic measures is revealed. Finally, combining the seismic intensity with the damage process of tunnel structure, the suitable conditions of various anti-seismic measures are put forward. It provides a reference for the research and development of new anti-seismic measures and anti-seismic fortification of tunnels.
【作者单位】：西南交通大学交通隧道工程教育部重点实验室;
【基金】：国家自然科学基金项目(51178398,51078319);国家自然科学基金青年科学基金项目(41102220,51208435)
【分类号】：U451.5

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