装配式张弦梁钢支撑结构力学性能分析  

Mechanical Property Analysis of Fabricated Beam String Steel Support Structure

作　　者：林雨浓 孙德畅 张朝慧 郑金伙 饶武斌 李欣 李海锋[1] LIN Yunong;SUN Dechang;ZHANG Chaohui;ZHENG Jinhuo;RAO Wubin;LI Xin;LI Haifeng(College of Civil Engineering,Huaqiao University,Xiamen 361021,China;Shanghai Baoye Group Limited Company,Shanghai 201941,China;Xiamen Anjie Construction Engineering Limited Company,Xiamen 361100,China;Fujian Provincial Institute of Architectural Design and Research Limited Company,Fuzhou 350001,China)

机构地区：[1]华侨大学土木工程学院,福建厦门361021 [2]上海宝冶集团有限公司,上海201941 [3]厦门安捷建筑工程有限公司,福建厦门361100 [4]福建省建筑设计研究院有限公司,福建福州350001

出　　处：《华侨大学学报（自然科学版）》2023年第3期309-318,共10页Journal of Huaqiao University(Natural Science)

基　　金：国家自然科学基金资助项目(51778248);福建省自然科学基金资助项目(2018J01075)。

摘　　要：为明晰装配式张弦梁钢支撑系统中预应力张弦梁结构的力学性能,采用ABAQUS有限元软件对张弦梁结构进行数值模拟分析.通过张弦梁撑杆预应力、撑杆截面尺寸、冠梁截面尺寸和桩基侧向刚度等影响因素分析张弦梁钢支撑的受力性能.利用MIDAS有限元软件对张弦梁钢支撑进行整体建模分析.结果表明:张弦梁靠近对撑部分的拉杆的承载能力对整个张弦梁的承载力起决定作用;增大撑杆预应力和桩基侧向刚度对张弦梁钢支撑承载能力有明显增强;增大撑杆截面和冠梁截面对张弦梁系统的承载能力提高不明显;张弦梁钢支撑系统的基坑位移处于预警值范围内,支撑系统对基坑位移有较好的控制作用.In order to clarify the mechanical property of prestressed beam string structure in fabricated beam string steel support system,ABAQUS finite element software is used to conduct numerical simulation analysis of beam string structure.The mechanical property of beam string steel support is analyzed through the influence factors such as prestress of struts,size of struts section,size of crown beam section and the lateral stiffness of pile foundation.MIDAS finite element software is used to conduct overall model analysis of beam string steel support.The results show that the bearing capacity of the tension rod near the counter brace part of the beam string determines the bearing capacity of the whole beam string.The increase of the prestress of the struts and the lateral stiffness of the pile foundation significantly enhances the bearing capacity of the beam string steel support.The increase of the section of struts and the size of crown beam section does not significantly improve the bearing capacity of the beam string system.The beam string steel support system foundation displacement is within the warning value,the support system has a better control of foundation displacement.

关 键 词：预应力张弦梁 基坑支护 承载能力 位移 

分 类 号：TU391[建筑科学—结构工程]