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集中参数模型将土模型化为一系列弹簧,描述土的变形性质。以郑州城郊铁路工程中独柱高架车站为例,比较分布土弹簧模型按《城市轨道交通结构抗震设计规范》推荐方法建模,基于《铁路桥涵地基和基础设计规范》中的“m”系数法建模,以及基于弹性半空间的Mindlin解建模,计算3种情况下车站结构的地震响应,对产生差异的原因进行了详细地分析。另外,依据《城市轨道交通结构抗震设计规范》相关规定,将分布弹簧模型等代为六弹簧模型进行车站结构的地震反应计算,讨论了模型中承台质量和桩体质量的影响。
The centralized parameter model models the soil as a series of springs that describe the deformation behavior of the soil. Taking the single-column viaduct station in Zhengzhou suburban railway project as an example, the comparatively distributed soil spring model is modeled according to the recommended method of Code for Design of Seismic Design of Urban Rail Transit. Based on “m ” in “Code for Foundation Design of Railway Bridges and Culverts” Coefficient method, and Mindlin solution modeling based on elastic half-space. The seismic response of station structure under three conditions is calculated and the causes of the difference are analyzed in detail. In addition, according to the relevant provisions of Code for Seismic Design of Urban Rail Transit, the distributed spring model is used to calculate the seismic response of the station structure on behalf of the six spring model, and the influence of the quality of the platform and the pile mass in the model is discussed.