土钉墙在地震作用下的动力稳定性分析

【作者】 王春放；

【导师】 朱彦鹏；

【作者基本信息】 兰州理工大学 ， 结构工程， 2008， 硕士

【摘要】 针对在地震作用下土钉支护结构设计中稳定性分析不充分时易导致发生失稳破坏的问题,本文采用边坡支护结构分析与稳定性计算理论,对土钉支护结构设计及稳定性进行了分析研究。本文研究内容包括土钉墙支护结构设计、土钉墙稳定性分析和有限元分析。研究结果表明,对于有较高抗震防震要求的土钉墙支护结构,除了进行静力稳定性分析外,还应进行动力稳定性分析。现行规范主要是针对支护结构的最终开挖深度进行了稳定性的分析,本文对支护结构的逐层开挖深度进行了稳定性分析,主要内容有:基于Fortran语言编制程序。利用网格法确定初步拟定的土钉支护的最危险滑移面,建立静力稳定性模型,进行静力稳定性分析;采用拟静力法模拟地震作用,用网格法确定土钉支护边坡在地震作用下的最危险滑移面,建立动力稳定性模型,进行动力稳定性分析。土钉长度和直径与最危险滑移面之间是一个动态的变化过程,用编制的计算程序对支护结构进行验算,使用方便,计算快捷。ADINA程序能够较好的模拟实际的工况,也可以用来对土钉支护结构进行理论分析。更多还原

【Abstract】 Aiming at slope supported with soil nailing is likely to destroy in the earthquake when the stability of it not considered reasonally,the design and stability of soil nailing supporting structure have been studied in the thesis,with analysis and calculation theories of supporting structure. Main research contents include design of structure supported with soil nailing wall, stability analysis of soil nailing wall and finite element analysis of it.The results show: soil nailing supporting structure should be reasonally designed, complied with the items of technical specifications for it.Not only static stability analysis, but also dynamic stability analysis should be done for soil nailing wall supporting structure located in the area where earthquake is likely to happen.The programme is written by Fortran.In the thesis,the most dangerous center of circular slip surface is searched with the method of lattice, the static stability analysis model is founded and the static stability analysis is done; the seismic effect is taken into account with the quasi-static method, the most dangerous center of circular slip surface of slope supported with soil nailing wall is searched with the method of lattice, the dynamic stability analysis model is founded and the dynamic stability analysis is done.The relationship between the most dangerous center of circular slip surface and the diameter and length of soil nailing is interactional.The stability of soil nailing supporting structure is analysis with the help of the programme which is facility and efficient.Not only the simulation of the actual construction process,but also the theoretical analysis of soil nailing supporting structure can be well done by the help of ADINA.更多还原