摘要
美国混凝土结构规范(ACI 318-08)将拉压杆模型设计方法作为规范性附录,用于指导混凝土结构D区的设计。首先介绍拉压杆模型构成,分析按中国规范(GB 50010-2010)的设计参数(荷载、混凝土强度、钢筋强度)设计时,压杆、拉杆及节点区内力的计算,提供了设计步骤。按照中国规范参数,对牛腿结构进行拉压杆模型设计,对比分析了按建议方法进行设计时与按ACI 318-08规范设计时安全度的差别。算例分析表明,按建议的拉压杆方法进行牛腿结构设计,力学概念清晰,计算简便,与中国规范规定设计方法的安全度水平相当,可用于钢筋混凝土牛腿结构的设计。
In American code for design of Concrete Structures(ACI 318-08),the strut-and-tie model method was used as a normative appendix for D-region design of reinforced concrete members.The constituent of the strut-and-tie model was introduced.Calculation of internal forces in struts,ties and node zone were proposed according to the design parameters(loading,concrete strength,steel strength) of the current Chinese code(GB 50010-2010).Then the design procedure was provided.Strut-and-tie model design method for reinforced concrete corbels was proposed following Chinese code parameters which degree of safety was compared with in ACI 318-08 through an example.The compared result shows that the proposed method can be used for the design of reinforced concrete corbels with clearer mechanical concepts and easier calculations.
出处
《土木建筑与环境工程》
CSCD
北大核心
2013年第S1期36-39,61,共5页
Journal of Civil,Architectural & Environment Engineering
基金
国家自然基金项目(50779018)
郑州市科技领军人才计划(112PLJRC354)
关键词
钢筋混凝土牛腿
D区
拉压杆模型
配筋设计
安全度
reinforced concrete corbels
D-region
strut-and-tie model
reinforcement design
degree of safety.
