钢板-砖砌体组合结构托换改造技术及应用  

Application of steel plate-masonry composite structure technology for underpinning of masonry walls

作　　者：敬登虎[1] 曹双寅[1] 郭华忠 

机构地区：[1]东南大学,江苏南京210096 [2]江阴华忠建筑特种技术工程有限公司,江苏江阴214400

出　　处：《土木工程学报》2009年第5期55-60,共6页China Civil Engineering Journal

基　　金：东南大学新进博士科研启动资助项目(9205002407)

摘　　要：砖混结构底层的大空间改造需要对部分砖砌体承重墙体进行拆除,使得局部砖墙承重结构体系转换为梁、柱承重,因此必须采取有效的加固措施形成可靠的承重梁和柱子。相对传统的托梁拆墙改造技术,钢板-砖砌体组合结构托换是一种创新。它采用后锚固技术将钢板外包在砖墙上,通过有效的构造措施使钢板和砖墙连接成整体,保证两者之间能协同变形,从而使原来的承重墙体变换为钢板-砖砌体组合梁、柱框架。该方法具备截面尺寸变化小、施工方便、工期短、不需要模板以及外型美观等优点。通过对此类组合结构的施工工艺与工作机理的阐述,介绍某具体工程实例,并现场实测组合梁控制截面的应变大小和分布特征。检测结果表明组合梁的工作特点以及钢板-砖砌体组合结构用于传统砖砌体结构托换的可行性。To obtain larger space in the bottom of masonry structures, parts of the load bearing walls need to be removed, resulting in a transition from partial load-bearing wall structure to frame structure. Hence, it is of vital importance to take effective measures to form reliable beams and columns for the frame structure. Compared with the traditional renovation technologies, steel plate-masonry composite structure is a new system for structural strengthening and retrofitting. Post-strengthening is employed to fix steel plate around the masonry walls, together with other effective construction details, making the steel plates and the masonry walls combined into an entity and deform together. With this retrofitting technology, load-bearing wall structures are converted to beamcolumn bearing structures （i.e. frame structures）. This technology has many advantages, including small change in cross-section size, convenience and efficiency in construction, no need for formwork, and so on. Through a presentation of the working principle and construction process, a specific project example is introduced, with the values and distributions of strain in the control cross-section of a composite beam measured. Test results demonstrate that the performance of composite beams and the underpinning of the steel plate-masonry composite structure is a feasible technology for strengthening or retrofitting traditional masonry structures.

关 键 词：钢板 砖砌体 组合结构 托换 

分 类 号：TU398.9[建筑科学—结构工程]