某全民健身中心大跨度预应力钢筋混凝土跨层桁架结构分析与设计  

Analysis and design on large-span prestressed reinforced concrete cross-layer truss structure of a national fitness center

作　　者：夏小虎[1] 刘明 邵兴宇 魏剑[1] XIA Xiaohu;LIU Ming;SHAO Xingyu;WEI Jian(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17期47-53,共7页Building Structure

摘　　要：为了实现某全民健身中心局部多层的无柱大空间,结构设计采用了在二层设置大跨度预应力梁和在三层、四层设置大跨度预应力钢筋混凝土跨层桁架的方案。采用SAP2000软件对比了跨层桁架中预应力筋一次性全部张拉施工和分层浇筑、分批张拉施工下杆件的内力情况,结果表明后者的桁架下弦杆件的最终拉力较小,符合设计要求。通过各施工阶段下桁架杆件的内力变化情况,确定了预应力筋的布置及数量。最后,介绍了本工程预应力杆件的设计和采取的针对性设计措施,说明了施工阶段的监测情况。通过以上分析及设计,验证了预应力钢筋混凝土跨层桁架结构的可行性,较好地实现了建筑功能。In order to realize the local multi-layer column-free large space of a national fitness center,the structural design adopts the scheme of setting large-span prestressed beams on the second floor and setting large-span prestressed reinforced concrete cross-layer trusses on the third and fourth floors.SAP2000 software was used to compare the internal forces of the members in the cross-layer truss under the one-time full tension construction and the layered pouring and batch tension construction of the prestressed tendons.The results show that the final tension of the lower chord of the truss of the latter is small and meets the design requirements.Through the internal force changes of truss members in each construction stage,the arrangement and number of prestressed tendons were determined.Finally,the design of the prestressed members of the project and the targeted design measures were introduced,and the monitoring situation in the construction stage was explained.Through the above analysis and design,the feasibility of prestressed reinforced concrete cross-layer truss structure was verified,and the building function is well realized.

关 键 词：大跨度场馆 预应力钢筋混凝土跨层桁架 预应力筋张拉 预应力监测 

分 类 号：TU378[建筑科学—结构工程]