叠加空腹桁架的钢-钢骨混凝土组合转换桁架设计分析与监测  

Design analysis and monitoring for steel⁃SRC composite conversion truss with vierendeel truss

作　　者：骆顺心[1] 李四祥 呼峰 陈洲[1] 李必雄 LUO Shunxin;LI Sixiang;HU Feng;CHEN Zhou;LI Bixiong(Central-South Architectural Design Institute Co.,Ltd.,Wuhan 430071,China)

机构地区：[1]中南建筑设计院股份有限公司,武汉430071

出　　处：《建筑结构》2024年第14期18-22,46,共6页Building Structure

摘　　要：针对某上弦为钢骨构件、腹杆及下弦为型钢的钢-钢骨混凝土组合转换桁架结构,采用PKPM软件对组合转换桁架和其上空腹桁架进行了多个整体模型的弹性对比分析及静力推覆分析。结果表明,施工模拟方式、楼面板刚度模拟方式、混凝土空腹桁架构件徐变、中大震下出铰情况对转换桁架和空腹桁架分担的转换荷载计算值均有较大影响,相关因素应予包络、准确地考虑。对多个子结构组合而成的结构体系,应明晰各子结构在整体中发挥的作用,以及各子结构在相关因素变动情况下的定量变化情况,以保证各子结构性能稳定性和整体结构的安全。工程施工阶段监测表明,叠加空腹桁架的组合转换桁架结构变形及构件应变基本与设计预期相符,转换结构安全合理。Aiming at a steel-SRC composite conversion truss structure with steel upper chord,steel web member and lower chord,the elastic comparative analysis and static pushover analysis of multiple overall models of the composite conversion truss and its upper vierendeel truss were carried out by PKPM software.The results show that the construction simulation method,the floor panel stiffness simulation method,the creep of concrete vierendeel truss members,and the hinge situation under medium and large earthquakes have a great influence on the calculation value of the conversion load shared by conversion truss and vierendeel truss.The relevant factors should be enveloped and accurately considered.For the structural system composed of multiple substructures,the role of each substructure in the whole and the quantitative changes of each substructure under the change of relevant factors should be clarified to ensure the performance stability of each substructure and the safety of the whole structure.The monitoring of the construction stage shows that the deformation and component strain of the composite conversion truss structure with vierendeel truss are basically consistent with the design expectations,and the conversion structure is safe and reasonable.

关 键 词：钢-钢骨混凝土组合转换桁架 空腹桁架 转换结构 组合结构 

分 类 号：TU398.9[建筑科学—结构工程]