集中荷载下无腹筋梁抗剪承载力新的设计方法  

New design method on shear strength of RC beams without web reinforcement under concentrated load

作　　者：张建新[1] 李辉[1] 李青宁[2] 

机构地区：[1]四川建筑职业技术学院,四川德阳618000 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《四川建筑科学研究》2015年第6期11-14,共4页Sichuan Building Science

基　　金：四川省科技厅研究项目(2009SZ0107)

摘　　要：采用数理统计的方法,通过对收集到的国内外集中荷载作用的钢筋混凝土无腹筋简支梁的大量试验数据进行回归分析,对无腹筋简支梁受剪承载力的主要影响因素综合加以考虑,通过引入纵筋率及截面高度综合影响参数,提出无腹筋简支梁抗剪承载力实用计算公式,并把利用该式得到的相应计算值与试验数据进行比较。研究表明,本文所建议的计算公式与试验结果有较好的吻合度且偏于安全,基本可以应用于实际工程。To evaluate the shear bearing capacity of reinforced concrete composite beams, the accurate calcutation formulas are needed. On the basis of available testing data of simply supported reinforced concrete beams without web reinforcement under two-point concentrated load, the effects of concrete strength, the shear-span to depth ratio, and the reinforcement ratio of longitudinal reinforcing bar on the shear resistance of reinforced concrete beams subject to concentrated load are reinvestigated. Researches are shown that through leading into comprehensive influence parameter of longitudinal reinforcement ratio and the high of beam, the formulas are proposed to calculate the shear bearing capacity of reinforced concrete beams without web reinforcement, which are simple, in better agreement with a large number of the experimental data. At the same time, compare the shear design equations of China design code of reinforced concrete structures, the credibility contain very big exaltation. Therefore, that formula is available for the extensive applicability.

关 键 词：无腹筋梁 受剪承载力 集中荷载 数理统计 

分 类 号：TU37[建筑科学—结构工程]