若干规范无腹筋梁受剪承载力公式比较  

Comparison among shear design formulae in different codes for beams without web reinforcement

作　　者：于磊[1] 车轶[1] 宋玉普[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《水利水电科技进展》2010年第4期90-94,共5页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金(50778034);国家自然科学重点基金(50838001)

摘　　要：根据收集到的集中荷载作用下无腹筋钢筋混凝土梁受剪试验数据,讨论了混凝土强度、剪跨比、截面高度和纵筋配筋率等因素对无腹筋梁计算结果的影响。通过对比分析,定量评价了我国GB 50010—2002和SL191—2008、美国ACI318—05,以及加拿大CSA A23.3—04等规范的受剪承载力计算公式。研究表明,与CSA A23.3-04相比,根据试验数据建立的GB50010—2002,SL191—2008和ACI 318—05等规范中受剪承载力公式的计算结果离散程度较大,并且采用后面3种规范公式计算有效高度大于600 mm、纵筋配筋率小于1.0%的梁时,计算结果偏于不安全。According to the collected test data of reinforced concrete beams without web reinforcement under concentrated loads,the influences of concrete strength,shear-to-span ratio,sectional depth and longitudinal reinforcement ratio on the calculated results of the beams were discussed.The shear design formulae from Chinese codes GB 50010—2001 and SL 191—2008,American code ACI 318—05 and Canadian code CSA A23.3—2004 were quantitatively evaluated and compared.The studies show that the empirical data-based formulae in Chinese and American codes present larger scattering of results than the formula in Canadian code.The former three formulae may lead to unsafe results when applied to the beams with the effective sectional depth greater than 600 mm and the longitudinal reinforcement ratio less than 1.0%.

关 键 词：钢筋混凝土梁 剪切强度 受剪承载力 规范比较 

分 类 号：TU375.1[建筑科学—结构工程]