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  郑一峰,陈鑫.城市轨道桥梁桩基抗震简化模型的比较研究[J].震灾防御技术,2018,(1):23-40, DOI:10.11899/zzfy20180103.

城市轨道桥梁桩基抗震简化模型的比较研究
摘要:    以郑州城郊铁路工程中独柱高架车站为例,将土体化为一系列弹簧,描述土体的变形性质。通过比较《城市轨道交通结构抗震设计规范》中的非线性土弹簧、《铁路桥涵地基和基础设计规范》中的m系数法弹簧及Mindlin解弹簧进行建模计算得到的车站结构的地震响应,由结果可知结构地震响应对承台处弹簧刚度最为敏感。另外,将分布弹簧模型等代为六弹簧模型进行地震反应计算,结果表明桩体质量的影响与承台质量相比很小。
作者单位
郑一峰 吉林大学, 建设工程学院, 长春 130026 
陈鑫 吉林大学, 建设工程学院, 长春 130026 
关  键  词:桩-土相互作用  弹簧刚度系数取值  土非线性  承台质量  桩质量
DOI:10.11899/zzfy20180103
基金项目:
收稿日期:2017-07-05
作者简介:郑一峰,男,生于1966年。博士,教授。研究方向:大跨径桥梁施工控制。E-mail:zhengyf0824@126.com
通讯作者:
Comparative Study of Pile Foundation Seismic Simplify Model for Urban Railway Bridge
Abstract:      Based on the single column station in Zhengzhou suburb railway engineering, soil material is considered as a series of springs to describe the deformation properties. A comparative study of non-linear spring from Code for Seismic Design of Urban Rail Transit Structures, m coefficient method from Code for Design on subsoil and foundation of railway bridge and culverts, and soil modulus in Mindlin model is conducted, which explains that the seismic response of bridge structure is most sensitive to spring stiffness around pile cap. In addition, a six-spring model is gained based on the primary distributed spring model to calculate the seismic response, which shows that the influence of pile mass is very small compared with the influence of pile cap mass.
Keywords:  Soil-pile interaction spring  Stiffness coefficient values  Soil nonlinear  Pile cap mass  Pile mass
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