大跨度混凝土悬空结构支撑体系研究与应用

Research and Application of Support System of Long-span Concrete Suspended Structure

针对大跨悬空混凝土结构支撑平台设计问题,总结悬空结构支撑体系类型,并分析其适用范围及受力特点。以菏泽恒大御峰房地产开发项目为例,对其屋顶大跨混凝土花架梁悬空结构从纯简支式、简支下撑式和简支斜拉式支撑体系3个方案进行比选,确定选用简支斜拉式支撑体系并进行设计。采用ANSYS有限元软件对悬空支撑平台的应力及变形进行理论分析,结合实际情况分析悬空结构支撑体系现场安装要点,施工过程中进行了沉降监测。理论计算及现场监测结果表明,斜拉支撑平台整体应力较小,斜拉杆与主梁和主体结构连接的两端应力较大,沉降理论计算值大于实测值,应力值和变形值均在安全范围内。

Aiming at the design problem of the support platform of large-span suspended concrete structure,the types of support systems of suspended structures were summarized,and its applicable scope and force characteristics were analyzed.Taking Heze Hengda Yufeng real estate development project as an example,the suspended structure of its roof concrete pergola beams was carried out from three schemes of pure simply supported support system,simply supported under-supported support system and simply supported cablestayed support system.The simply supported cable-stayed support system was selected and designed.ANSYS finite element software was used to conduct theoretical analysis on the stress and deformation of the suspended support platform.Based on the actual situation,the key points of the on-site installation of the support system of the suspended structure were analyzed,and the settlement was monitored during the construction process.Theoretical calculations and on-site monitoring results show that the overall stress of the cable-stayed support platform is relatively small,the stress at both ends of the cable-stayed connection between the main beam and the main structure is relatively large,the theoretical settlement value is greater than the actual measured value,and the stress and deformation values are within a safe range.