【摘要】 通过托梁拔柱实现大空间在工程中并不少见 ,对某工程采用主、被动相结合的手法 ,把预应力和粘钢加固综合应用在抽柱后形成的大跨度梁上 ,将梁柱节点设置为铰接以减小对柱的抗弯承载力的影响 ,合理设置体外预应力转向块 ,提高了安全度 ,同时便于施工 ,为同类工程改造设计提供了参考更多还原

【Abstract】 It′s a passive method to reinforce RC beam with glued steel plate and enlarging cross section while the post-stressed method is an active one.This paper introduced a reconstruction project of a long span RC beam with demolishing column,which applied the advantages of the above two types.The beam-column joint is designed as a hinged one to reduce the effect on bending bearing capacity of columns,and the transfer of external prestress is also set properly,which may be served as reference for the design of similar reconstruction projects.更多还原