混凝土悬挑梁的接长改造与加固  

Lengthening and Reinforcement of Concrete Cantilever Beams

作　　者：王佐[1] 

机构地区：[1]华东建筑设计研究院重庆分院,重庆400015

出　　处：《建筑科学》2007年第3期77-79,86,共4页Building Science

摘　　要：某结构改造中混凝土悬挑梁从1.2m分别接长至2.0m和3.0m。由于悬挑梁是静定结构,其连接的可靠性是悬挑梁接长改造的关键,而新旧混凝土的结合面是改造加固的薄弱环节。通过对影响新旧混凝土粘结性能的因素进行分析,采取多重措施确保了悬挑梁接长的可靠性。A cantilever beam is lengthened from 1.2 meter to 2.0 meter and 3.0 meter. The reliability of connection of new beam to old beam is key to lengthening of a cantilever beam which is statically determinate with no redundancy. Young-to-old concrete interface is the week link of reconstructed structure. Through the analysis on the factors related to bond behavior of young-to-old concrete, the reliability of prolongation of cantilever beams is ensured by several measures.

关 键 词：结构改造 悬挑梁 新旧混凝土粘结 粗糙度 自流平混凝土 加固 

分 类 号：TU32[建筑科学—结构工程]