地震作用下桥台台后填土被动土压力位移曲线研究毕业论文设计.docVIP

摘 要 桥台与桥台台后回填土的相互作用可以显著影响桥梁的地震反应。国内外关于桥台台后填土的理论研究方法有很多。但是由于台土相互作用的复杂性，在台后填土的分析方法和研究着重点上还有许多目前尚未解决和完善的问题。因此通过实桥试验对地震作用下桥台台后填土被动土压力-位移曲线用多种常用的方法来研究便加以对比是十分必要的，本文中用到四种计算方法，三种位移模式进行研究，具有实际的应用价值。本文主要进行了以下研究工作： （1）学习和总结国内外各种土压力的计算方法，并了解每种计算方法的适用条件和影响因素； 学习和掌握几种实用的土压力位移曲线模式，并且了解每种模式的适用条件和影响因素； 重点掌握经典土压力计算方法，胡晓军和谭晓慧改进的库仑被动土压力计算方法对数螺旋-条分法等四种计算方法和Duncan双曲线方法、HFD方法、LSH方法等三种力-位移关系的确定方法，并运用于实桥； （4）对不同计算方法和计算模式得到的结果加以分析和综合，从而更深刻的了解这些公式的适用条件、意义和优点； 关键词：地震；计算方法；计算模式；台后土压力；位移；Abstract Abutment-backfill soil interaction can significantly influence the seismic response of bridges.The experts at home and abroad have done many theory research about abutment-backfill soil,but because of the complexity of abutment-soil interaction,there are many problem having not been solved on the methods of analysis and design of the earth pressure,so it is necessary to use a verity of methods to study bridge abutment backfill passive earth pressure - displacement curves under earthquake.Four methods of computation and three kinds of displacement mode are used in this article,with practical application value.This paper conducted the following studies: Learning and summarizing various kinds of earth pressure calculation method home and abroad,and to understand the influence of each method; (2)Learning and summarizing various kinds of earth pressure displacement curve mode home and abroad,and to understand the influence of each curve mode; (3)Focusing on mastering classical earth pressure calculation method, Hu Xiaojun and Tan Xiaohui improved Coulomb passive earth pressure calculation method ,LSH method of the four methods of calculation method and Duncan hyperbolic method, HFD method, LSH methods - displacement relationship determine the method and applied them to the real bridge; (4) Analyze and synthesize the results of different calculation methods and models i get, i can get a deeper understanding of these formulas applicable conditions, significance and benefits; Key Words:Ea