针对花瓶墩柱墩顶处的有限元分析方法  

Finite Element Analysis Method for the Top of Vase pier

作　　者：王鑫[1] 马利君[1] 雷洋[2] 张媛[2] 

机构地区：[1]北京市市政工程设计研究总院有限公司,100082 [2]唐山工业职业技术学院,063200

出　　处：《特种结构》2015年第5期37-39,8,共4页Special Structures

摘　　要：花瓶墩因其优美的造型,在近年来的工程中应用十分广泛。但独特的造型也导致其受力状况不同于普通的圆形或矩形墩柱。其墩身静力计算及地震计算尚可近似按矩形墩计算,但墩顶区域受力复杂,用杆系单元或板单元模拟都难以反应真实的受力情况。现阶段,此种结构在设计中并没有有效且简便的公认算法。本文针对此种情况进行分析,并以某工程实例为依据,采用有限元实体单元模拟花瓶墩各部分的受力状况,得到其分叉部位的弯矩及应力,分别用弯矩分析及应力分析进行配筋验算,并对这两种方法所得结果进行分析比较,相互验证。此外,对墩顶支座处抗拉、抗剪分别进行验算,并得出配筋结果。希望本文的分析及计算流程,可为今后类似结构设计提供参考。Because of beautiful shape, vase pier was widely applied in engineering in recent years. But its stress state is different from the ordinary circular or rectangular pier for its unique shape. Static and seismic calculation of the pier can be approximately calculated by rectangular pier, however the real force can hardly be reacted by simulated with truss unit or plate unit in top of the pier for its complex loading. At present, there is no effective and simple recognition algorithm in design for this kind of structure. Aimed at this kind of situation, stress state of each part of vase pier were simulated with finite element entity unit, and the bending moment and stress of the fork parts were got based on an engineering example,. Reinforcement was checked by bending moment and stress analysis respectively, and the results of the two kinds of methods were compared and analyzed, and verified with each other In addition, the tensile and shear bearing was checked respectively in the top of the pier, and the reinforcement results were obtained. It＇s hoped that the analysis and the calculation process in this article can be used as reference in similar structural design in the future.

关 键 词：花瓶墩 实体单元 有限元计算 极限状态法 容许应力法 

分 类 号：U443.2[建筑科学—桥梁与隧道工程]