钢筋混凝土板受冲切承载力对比分析  

Comparative Analysis of Punching Shear Capacity for Reinforced Concrete Slabs

作　　者：魏巍巍[1] 贡金鑫[1] 田磊[1,2] 

机构地区：[1]大连理工大学建设工程学部,辽宁大连116024 [2]中交水运规划设计院有限公司,北京100007

出　　处：《建筑科学与工程学报》2010年第4期44-56,共13页Journal of Architecture and Civil Engineering

基　　金：“十一五”国家科技支撑计划项目(2006BAJ01B06-06)

摘　　要：对中国规范GB 50010—2002、美国规范ACI 318-08和欧洲规范EN 1992-1-1:2004中钢筋混凝土柱支撑板在无不平衡弯矩和有不平衡弯矩作用下的受冲切承载力计算方法进行了对比,研究了影响受冲切承载力的因素,并给出了不平衡弯矩作用下等效设计剪力系数的简化计算公式。结果表明:中国和美国规范板受冲切承载力计算体系较为接近,但欧洲规范计算体系与中国、美国规范相比差别较大;无不平衡弯矩作用时混凝土强度、板有效高度、柱边长比、抗冲切钢筋等因素对受冲切承载力影响较大;有不平衡弯矩作用时受冲切承载力计算还取决于不平衡弯矩;推导得到的中国、美国和欧洲规范中柱的等效设计剪力系数公式比较接近,即中国、美国和欧洲规范中的不平衡弯矩系数是接近的。Prediction models of punching shear capacity for reinforced concrete slabs with or without unbalanced moment based on GB 50010—2002,ACI 318-08 and EN 1992-1-1：2004 were compared and analyzed.Then,the factors influencing punching shear capacity were researched.Finally,simplified calculation formulas of equivalent design shear coefficients under unbalanced moment were derived.Results show that prediction models of punching shear capacity based on Chinese code are close to those of American code,but different from those of Eurocode.The effects of concrete strength,effective depth of slabs,side ratio of column and punching resistance reinforcements on punching shear capacity without unbalanced moment are significant.In addition to these factors,unbalanced moment has influence on punching shear capacity with unbalanced moment.Furthermore,the derived formulas of equivalent design shear coefficients for interior column based on three codes are close to each other,and unbalanced moment coefficients based on three codes are close to each other.

关 键 词：钢筋混凝土板 受冲切承载力 规范 配筋率 不平衡弯矩 

分 类 号：TU375.2[建筑科学—结构工程]