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.
出处
《建筑科学》
北大核心
2007年第3期77-79,86,共4页
Building Science
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
reconstruction
cantilever beam
bond of young-to-old concrete
interfacial roughness
self-leveling concrete
reinforcement
