多肢圆钢管桩的抗震性能分析  

Seismic Performance Analysis of Multi-limbs Circular Steel Pipe Piles

作　　者：余细东 周荣丰 钱立振 谈勋勋 YU Xidong;ZHOU Rongfeng;QIAN Lizhen;TAN Xunxun(China Construction Fifth Engineering Bureau the Third Construction Co.,Ltd.,Changsha 410004,Hunan,China)

机构地区：[1]中建五局第三建设有限公司,湖南长沙410004

出　　处：《建筑施工》2023年第10期2106-2110,共5页Building Construction

摘　　要：运用大型有限元软件ANSYS建立了某项目售楼部的多肢加固圆钢管桩结构精细有限元模型。对该结构进行静力分析和模态分析,以验证有限元模型的有效性,并得到该结构的自振特性。在模态分析和反应谱分析的基础上,选用Elcentro波、Taft波对该结构进行7度(0.1g)多遇地震和罕遇地震作用下的时程分析。结果表明:该结构的结构平面布置较合理;在多遇地震单独作用下,构件均处于弹性工作状态,应力水平均较低,地震作用并非此结构设计的控制性荷载;在重力荷载代表值与多遇地震、罕遇地震作用下,钢材均未进入屈服阶段,该结构抗震性能良好。A detailed finite element model of a multi-limbs circular steel pipe pile structure in a sales department of a certain project is established using the large-scale finite element software ANSYS.The static and modal analysis is performed on the structure to verify the effectiveness of the finite element model and obtain the natural vibration characteristics of the structure.On the basis of modal analysis and response spectrum analysis,Elcentro waves and Taft waves are selected to conduct time history analysis of the structure under 7-degree(0.1 g)frequent and rare earthquakes.The results indicate that the structural plane layout of this structure is relatively reasonable;under the action of multiple earthquakes alone,the components are in an elastic working state,with low stress levels,and seismic action is not a controlling load in the design of this structure;under the representative value of gravity load and the action of frequent and rare earthquakes,the steel does not enter the yield stage,and the seismic performance of this structure is good.

关 键 词：多肢 圆钢管桩 模态分析 抗震性能分析 

分 类 号：TU755[建筑科学—建筑技术科学]