船闸闸室-地基相互作用体系地震动力特性三维数值分析

发布时间：2018-04-26 18:55

本文选题：船闸闸室 + 反应谱分析　；参考：《沈阳建筑大学学报(自然科学版)》2017年02期

【摘要】：目的研究船闸闸室体系动力受力变形特性,分析其地震作用下船闸闸室结构-地基相互作用体系的动力响应特性,评价其抗震性能.方法采用子空间迭代法提取船闸闸室体系自然频率与振型,采用考虑几何非线性的Newmark隐式积分法求解船闸闸室动力体系方程,针对横向和竖向地震力作用下船闸闸室相互作用体系分别进行振型分解反应谱和动力时程分析.结果 3组水平地震波作用下,船闸闸室体系闸墙横向水平位移最大幅值为42.5 mm,最大拉应力为1.39 MPa.结论船闸闸室体系弹性动力时程分析与地震反应谱计算结果幅值水平相近,地震反应谱分析结果及进一步动力时程分析,船闸结构满足抗震规范要求.
[Abstract]:Aim to study the dynamic deformation characteristics of lock chamber system, to analyze the dynamic response characteristics of lock chamber structure-ground interaction system under earthquake, and to evaluate its seismic performance. Methods the natural frequencies and modes of lock chamber system were extracted by subspace iteration method, and the dynamic system equation of lock chamber was solved by Newmark implicit integration method considering geometric nonlinearity. The vibration mode decomposition response spectrum and dynamic time history analysis of ship lock chamber interaction system under transverse and vertical seismic forces are carried out respectively. Results under the action of three groups of horizontal seismic waves, the maximum horizontal displacement of lock wall was 42.5 mm and the maximum tensile stress was 1.39 MPA. Conclusion the amplitude of elastic dynamic time history analysis of lock chamber system is similar to that of seismic response spectrum calculation. The seismic response spectrum analysis results and further dynamic time history analysis show that the shiplock structure meets the requirements of seismic code.
【作者单位】：大连海事大学土木工程系;北京工业大学建筑工程学院;
【基金】：国家自然科学基金面上项目(51578100) 中央高校基本科研业务费项目(3132014326,3132016216)
【分类号】：U641

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