高强钢筋混凝土梁抗剪性能对比分析

Contrast Analysis of Shear Performance of High-strength RC Beams

通过对国内外有关试验数据分析,对集中荷载作用下高强钢筋高强混凝土矩形截面梁斜向开裂荷载的实用公式进行探讨,同时分别用《混凝土结构设计规范》(GB50010-2010)和美国《钢筋混凝土房屋建筑规范》(ACI318-08)中受剪承载力的计算公式对试验数据进行对比分析。结果表明,有腹筋高强钢筋混凝土梁在集中荷载作用下,我国规范安全度略低,美国规范比我国规范偏安全,富余度较高。据此提出了集中荷载作用下高强钢筋混凝土矩形截面梁抗剪承载力实用设计公式。

Based on the analysis of the domestic and foreign relevant test data, concentrated load practical formula of the high-strength RC rectangle section beam diagonal cracking load are discussed, and with the computational formula of 《Code for Design of Concrete Structures》（GB50010-2010） and American 《Building Code Requirements for Structural Concrete and Commentary》（ACI318-08）, test data are analyzed. The results show that, for high-strength RC beam with stirrups under concentrated load, the reliability of Chinese specification is lower. Comparing with Chinese specification, American specification is more safe, regulating partial security surplus degrees are higher. According to these, a practical design formula of the high-strength RC rectangle section beam resisting shear bearing capacity under concentrated load is proposed.