大截面框支梁柱不同力学模型计算对比  

Comparison of Different Mechanical Models for Calculating Large-Section Frame-Supported Columns and Beams

作　　者：李家岑 赵群昌 LI Jiacen;ZHAO Qunchang(Shenzhen Municipal Design&Research Institute Co.,Ltd.Shenzhen 518029,China)

机构地区：[1]深圳市市政设计研究院有限公司,深圳518029

出　　处：《广东土木与建筑》2024年第9期71-75,共5页Guangdong Architecture Civil Engineering

摘　　要：全框支剪力墙结构下部转换框架构件截面尺寸较大,采用一般的梁单元计算可能会造成一定的计算误差。本文研究对象为地铁车辆基地上盖全框支剪力墙结构,对下部转换框架构件分别用梁单元、壳单元、实体单元计算,进行刚度对比、整体位移对比、转换梁受力对比,找到其变化规律。结果表明实体单元与面内壳单元计算精度相近,可简化用面内壳单元模拟实体单元。实体单元计算的框架刚度大于梁单元,考虑梁柱刚域可减小与实体模型刚度的差距。实体模型计算的地震力大于杆系模型,但地震位移角较小。实体单元的配筋与线性梁单元有所不同,建议加强转换梁底部配筋。The full-frame-supported shear wall structure features large cross-sectional dimensions for its lower transfer frame components,which may introduce certain calculation errors when using ordinary beam elements for computation.This study focuses on the full-frame-sup‐ported shear wall structure of a subway vehicle base.The lower transfer frame components are analyzed using beam elements,shell ele‐ments,and solid elements separately,comparing stiffness,overall displacement,and stress distribution in the transfer beams to identify their varying patterns.The results indicate that the calculation accuracy of solid elements is similar to that of in-plane shell elements,suggesting that in-plane shell elements can be used as a simplified alternative to simulate solid elements.The frame stiffness calculated using solid ele‐ments is greater than that of beam elements.By taking into account the stiffness of beam-column joints,the gap in stiffness between the two models can be reduced.Additionally,the seismic force calculated by the solid model is greater than that of the bar system model,but the seismic displacement angle is smaller.There are also differences in reinforcement requirements between solid elements and linear beam ele‐ments,and it is recommended to strengthen the reinforcement at the bottom of the transfer beam.

关 键 词：全框支剪力墙 转换构件 梁单元 壳单元 实体单元 

分 类 号：TU375[建筑科学—结构工程]