高强钢筋混凝土连续梁受弯性能的试验研究和有限元分析  

Experimental Study and FEM Analyses of the Flexural Behavior of the Reinforced Concrete Continuous Beam with High-strength Steel Bar

作　　者：韩重庆[1] 刘桥[2] 许清风[3,4] 徐智敏[1] 

机构地区：[1]东南大学建筑设计研究院有限公司,南京210096 [2]中铁第四勘察设计院集团有限公司,武汉430063 [3]上海市工程结构安全重点实验室,上海200032 [4]上海市建筑科学研究院(集团)有限公司,上海200032

出　　处：《结构工程师》2015年第4期172-181,244,共10页Structural Engineers

基　　金：上海市人才发展资金资助项目(2011058);上海市科委应用技术开发项目(2011-114)

摘　　要：共进行了2根采用HRB500级高强钢筋和1根HRB335普通钢筋混凝土连续梁的受弯性能试验研究及有限元分析。研究结果表明:高强钢筋混凝土连续梁在裂缝发展规律、截面应变分布、塑性铰出铰顺序和破坏形态等方面与普通钢筋混凝土连续梁基本一致。但高强钢筋混凝土连续梁的跨中屈服荷载、中支座屈服荷载和极限荷载均较普通钢筋混凝土连续梁明显提高,分别提高28.7%、22.8%和30%;构件延性有所提高,提高幅度为8.1%。有限元分析结果与试验结果吻合较好,精度符合工程精度要求。The flexural behavior of two reinforced concrete continuous beams with HRB500 bars and one RC continuous beam with HRB335 bars was experimentally studied.And the numerical analysis was also conducted by using the FEM software.Test results indicated that the crack progression,the sectional strain distribution,the sequence of plastic hinges and the failure mode were almost the same for all three specimens. But the yielding load at the midspan,the yielding load at the mid-support,the ultimate load and the ductility factor of RC continuous beams with high-strength steel bars had a 28.7%,22.8%,30% and 8.1% increase respectively than that of RC continuous beam with normal-strength steel bars.The predictions of finite element analysis were in good agreement with the test results and can satisfy the engineering use requirement.

关 键 词：钢筋混凝土连续梁 高强钢筋 重分布 塑性铰 

分 类 号：TU375.1[建筑科学—结构工程]