地震作用下集装箱结构力学性能分析

Analysis of Mechanical Properties of Container Structure Under Earthquake Action

针对目前广泛应用的多层集装箱房屋,提出了一种基于箱体之间摩擦耗能的滑移隔震体系.首先,建立了结构滑移隔震模型,并利用结构随机振动理论分析推导了层层滑移隔震结构各层等效阻尼比与摩擦系数之间的关系;然后,利用Abaqus非线性有限元软件建立了六层集装箱模型,对隔震结构、采用规范阻尼比的非隔震结构和采用等效阻尼比的非隔震结构分别在强震作用下的动力反应进行了弹塑性时程研究,分析了结构顶点位移、结构层间位移角以及结构层间滑移量等相关指标。结果表明:滑移隔震体系能有效减小结构各层最大位移;隔震结构和采用等效阻尼比的非隔震结构的最大层间位移角远小于采用规范阻尼比的非隔震结构;地震波的频谱特性会明显影响层层滑移隔震结构的动力反应.

Aiming at the widely-used multilayer container buildings , a new sliding isolation system is proposed on the basis of the friction energy dissipation between containers .Firstly, a sliding isolation structure model is con-structed , and a relationship between the equivalent damping ratio and the friction coefficient of each layer of layer -upon-layer sliding isolation structure is derived through the random vibration theory .Then, a six-layer container model are constructed on the basis of the nonlinear finite element software Abaqus , and the elasto-plastic nonlinear time history of dynamic response for strong earthquake is investigated on an isolated structure , a non-isolated struc-ture of ordinary damping ratio and a non-isolated structure of equivalent damping ratio .Finally, the relative struc-ture indexes, such as the top displacement , the angular displacement between structural layers and the slip between structural layers, are analyzed.The results show that （1） the proposed sliding isolation system can reduce the max-imum displacement of each structural layer effectively; （ 2 ） the isolated structure and the non-isolated structure with equivalent damping ratio have much smaller maximum angular displacement between structural layers than the non-isolated structure with specification damping ratio does; and （3） the spectral characteristics of seismic waves can affect the dynamic response of layer-upon-layer sliding isolation structures significantly .