荷载分项系数调整对砌体结构设计的影响  

Influence of load partial factors adjustment on design of masonry structures

作　　者：吴柯娴 金伟良[1] 夏晋 WU Ke-xian;JIN Wei-liang;XIA Jin(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学建筑工程学院,浙江杭州310058

出　　处：《浙江大学学报（工学版）》2018年第10期1901-1910,共10页Journal of Zhejiang University：Engineering Science

摘　　要：为了确定《建筑结构可靠性设计统一标准》(GB 50068)征求意见稿中的荷载分项系数调整对砌体结构设计安全性和材料用量的影响,以《砌体结构设计规范》(GB 50003–2011)中的无筋砌体和配筋砌体构件为研究对象,通过综合安全系数法和可靠指标法,分别计算荷载分项系数调整后砌体结构设计安全度的变化幅度.计算无筋砌体构件的横截面积增率和配筋砌体构件的配筋量增率,得到砌体结构设计材料用量的变化幅度.结果表明,荷载分项系数调整使砌体结构设计的综合安全系数提高5%,可靠指标提高5%~6.5%,无筋砌体构件的砌块材料用量提升6%~8%,配筋砌体构件的配筋量提升10%~23%.Unreinforced and reinforced masonry components from Code for Design of Masonry Structures(GB 50003-2011)were analyzed in order to illustrate the influence of load partial factor adjustment on safety level and material consumption of the masonry structures in the draft of Unified Standard for Reliability Design of Building Structures(GB 50068).The comprehensive safety factor method and the reliability index method were used to calculate the change range of the masonry structures design safety after the adjustment of the load partial factors.The increase rate of cross-sectional area of the unreinforced components and the reinforcement rate of the reinforced components were calculated to obtain the variation of the material consumption.Results showed that the adjustment of load partial factors improved the comprehensive safety factors of the masonry structures by 5%and the reliability indexes by 5%~6.5%.The block material consumption of unreinforced components was increased by 6%~8%,and the reinforcement consumption of reinforced components was increased by 10%~23%.

关 键 词：砌体结构 规范修订 分项系数 安全系数 可靠指标 材料用量 

分 类 号：TU365[建筑科学—结构工程] TU318