竖向荷载作用下带现浇楼板的连续梁受力性能试验研究  

EXPERIMENTAL STUDY ON STRUCTURAL BEHAVIOR OF R/C CONTINUOUS BEAMS WITH CAST-IN-SITU SLABS UNDER VERTICAL LOAD

作　　者：蒋利学[1,2] 

机构地区：[1]上海市建筑科学研究院,上海200032 [2]上海市工程结构新技术重点实验室,上海200032

出　　处：《工业建筑》2009年第11期62-67,共6页Industrial Construction

基　　金：国家科技支撑计划项目(2006BAJ03A07);建设部研究开发项目(2007-K3-16)

摘　　要：因梁端钢筋较少的现浇钢筋混凝土框架结构房屋评估改造的需要,对7根带现浇楼板的连续梁进行了竖向静力加载对比试验,研究现浇楼板对连续梁受力性能的影响,分析受压翼缘内混凝土与受拉翼缘内钢筋的应力分布规律以及有效翼缘宽度的变化规律。试验结果表明:现浇楼板对梁的截面应力状态、刚度、破坏模式和承载力均有很大影响,对支座截面抗弯承载力的提高作用尤其明显。For the purpose of evaluating and retrofitting of cast-in-situ reinforced concrete frames with little reinforcement at beam ends, tests are performed for 7 reinforced concrete continuous beams with cast-in-situ slabs under vertical static load. The effects of cast-in-situ slabs on the structural behavior of continuous beams are studied. Moreover, the stress distribution of concrete and reinforcement in the flange and the change of effective flange width are analyzed. The test results show that the cast-in-situ slabs have notable effects on the stress state, stiffness, failure mode and load-carrying capacity of beams, the increase in the beam flexural strength of support section is especially significant.

关 键 词：现浇楼板 连续梁 受力性能 试验 有效翼缘宽度 

分 类 号：TU375.2[建筑科学—结构工程]