正常使用状态下600 MPa级钢筋混凝土梁受弯性能试验研究  

EXPERIMENTAL STUDY ON FLEXURAL PROPERTIES OF REINFORCED CONCRETE BEAMS WITH REBAR HRB600 UNDER SERVICE CONDITIONS

作　　者：王新玲[1] 白岩 朱俊涛[1] WANG Xinling;BAI Yan;ZHU Juntao(School of Civil Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学土木工程学院,郑州450001

出　　处：《工业建筑》2020年第10期20-25,共6页Industrial Construction

基　　金：国家自然科学基金项目(51708511);河南省自然科学基金项目(182300410210)。

摘　　要：为探究600 MPa级钢筋用于混凝土受弯构件在正常使用状态下的适用性,设计制作了5根具有不同配筋率、钢筋直径及布筋方式的600 MPa级钢筋混凝土梁。采用三分点加载方式对上述试件进行受弯性能试验,结果表明:600 MPa级钢筋混凝土梁的整体受弯性能(裂缝分布、破坏形态和延性)与配置普通钢筋的混凝土梁基本相同;按准永久值组合并考虑长期荷载作用影响的构件挠度满足GB 50010—2010《混凝土结构设计规范》限值要求;但按上述荷载取值时所对应的构件裂缝宽度不满足GB 50010—2010限值要求。分析了裂缝宽度超限的原因,重点研究了减小受弯构件裂缝宽度的方法。In order to explore the applicability of rebar HRB600 for concrete flexural members under normal service conditions,five reinforced concrete beams with rebar HRB600 and different reinforcement ratios,rebar diameters and reinforcement methods were designed and fabrcated.The bending performances test of the above specimens were carried out by the three-point loading method.The results showed that the overall bending performances(crack development,failure modes and ductility)of the beams were the same as that of the concrete beam with ordinary rebars.The calculation deflection values that took quasi-permanent combination and considered long-term load action could meet limit requirements of the code of GB 50010-2010.However,the crack width of the corresponding members could not meet the limit.The reasons that crack width exceed the limits,especially the measures to reduce crack width of the flexural members,were analyzed.

关 键 词：600 MPa钢筋混凝土梁 受弯性能 正常使用状态 裂缝宽度 

分 类 号：TU375.1[建筑科学—结构工程]