基于试验数据的钢筋混凝土梁受剪承载力分析  

Shear capacity analysis for reinforced concrete beam based on test data

作　　者：袁健[1,2] 陈伯望[2] 

机构地区：[1]湖南大学土木工程学院,长沙410082 [2]中南林业科技大学土木工程与力学学院,长沙410004

出　　处：《建筑结构》2016年第2期12-18,共7页Building Structure

基　　金：住房和城乡建设部科技研发项目(2013-K4-21);湖南省住房和城乡建设厅科技项目(KY201318)

摘　　要：收集整理国内外420根钢筋混凝土矩形截面有腹筋简支梁的剪切试验数据,对《混凝土结构设计规范》(GB 50010—2010)、《公路钢筋混凝土及预应力混凝土桥涵设计规范》(JTG D62—2004)和美国规范ACI 318-11受剪承载力计算模型进行了误差分析,并进一步分析了各规范最小配箍率的合理性。选取其中113根有腹筋梁与同条件无腹筋梁进行比较,得到了箍筋对梁的受剪承载力贡献比例的变化趋势。结果表明,对于集中荷载作用下有腹筋梁受剪承载力,《混凝土结构设计规范》(GB 50010—2010)的计算公式预测值偏高,尤其是配置高强箍筋的普通强度混凝土梁;对于均布荷载作用下有腹筋梁受剪承载力,美国规范ACI 318-11预测结果的误差较小;各规范的最小配箍率取值较合理,能有效地避免梁发生斜拉破坏。The shear test data of 420 simply-supported rectangular cross-section reinforced concrete beams with stirrups from home and abroad were collected,and error analysis for shear capacity calculation model was carried out for several calculation models in Code for design of concrete structures（ GB 50010—2010）,Specification for design of reinforced concrete and prestressed concrete highway bridges and culverts（ JTG D62—2004） and American code ACI 318-11.Moreover,the reasonability of the minimum stirrup ratio of above codes was further conducted. The changing trend of stirrups contribution to the shear capacity of beams was obtained by the comparison of selected 113 beams with stirrups and beams without stirrups under the same condition. The results show that the values of shear capacity of beams predicted by Code for design of concrete structures（ GB 50010—2010） with stirrups subjected to concentrated loads are higher than the experimental ones,especially for normal strength concrete beams with high-strength stirrups. For shear capacity of beams with stirrups under uniformly distributed loads,American code ACI 318-11 provides less biased prediction. The values of minimum stirrup ratio in above three codes are reasonable,which can effectively avoid diagonal tension failure of beams.

关 键 词：钢筋混凝土梁 受剪承载力 计算模型误差 箍筋作用 最小配箍率 

分 类 号：TU318[建筑科学—结构工程] TU375