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为研究GB50010-2002《混凝土结构设计规范》(以下简称“我国规范”)剪扭构件的安全度水准及有关设计方法的合理性,对比分析了我国规范和ACI 318-08(以下简称“美国规范”)剪扭构件的承载力计算方法和结果,并进行了可靠度比较。结果表明,我国规范在考虑混凝土部分相关性时,用“三折线”简化模型将混凝土部分提供的抗扭和抗剪承载力相关曲线外扩,使得混凝土部分的计算承载力被高估,设计安全度偏小。美国规范对于混凝土部分剪扭相关性考虑得较为保守,使得混凝土部分设计偏于安全。美国规范配筋量比我国规范大,配筋基本满足1/4圆弧相关性模型的承载力要求;而我国规范计算所得的钢筋不能满足1/4圆弧相关性模型的承载力要求,设计安全度比美国规范小。美国规范的可靠指标比我国规范高,我国规范可靠指标不能满足GB 50068-2001《建筑结构可靠度设计统一标准》的要求。
In order to study the safety level of the shear members of GB50010-2002 “Code for Design of Concrete Structures” (hereinafter referred to as “China Code”) and the rationality of relevant design methods, the author compares and analyzes the standard of China and ACI 318-08 (hereinafter referred to as “ ”American Standard“) bearing capacity calculation method and result of shear member, and the reliability comparison. The results show that in our country, when considering the correlation between concrete parts, the curve of torsional and shear capacity correlation provided by the concrete part is extended by the simplified model of ”three fold lines“, which makes the calculated bearing capacity of concrete part overestimated, Design safety is too small. The United States Code considers the shear-torsional correlations of the concrete to be more conservative, which makes the concrete design partial to safety. The amount of standard reinforcement in the United States is larger than that in China, and the reinforcement basically meets the bearing capacity requirement of 1/4 circular arc correlation model. However, the steel bars calculated and calculated by our country can not meet the bearing capacity requirements of 1/4 circular arc correlation model. Safety is smaller than US regulations. The reliability of the United States norms norms than our norms, norms and reliable indicators of our country can not meet the GB 50068-2001 ”reliability of building structure design uniform standards" requirements.