型钢混凝土梁受剪承载力的计算及其可靠度分析

目的研究型钢混凝土梁斜截面受剪承载力计算公式的适用性．方法在阐述型钢混凝土梁斜截面受剪承载力计算理论、计算方法和计算公式的基础上，基于工程实例和33根试验梁的试验数据对型钢混凝土梁的斜截面受剪承载力进行了研究；并应用结构可靠度分析的一次二阶矩法。对型钢混凝土梁的斜截面受剪承载力计算公式进行了可靠度分析．结果《型钢规程》的斜截面受剪承载力计算公式的可靠指标为4．647，满足目标可靠指标的要求，而《钢骨规程》的斜截面受剪承载力计算公式的可靠指标为2．100，不满足目标可靠指标的要求．结论使用《型钢规程》的计算公式来设计计算型钢混凝土梁的斜截面受剪承载力是安全可靠的．

Calculation and Reliability Analysis of the Shear Capacity of Steel Reinforced Concrete Beams

Two formulae can be used to calculate the shear capacity of steel reinforced concrete beams.In order to study their suitability,these calculation theories,methods and formulae were presented at the beginning of this paper.Engineering projects and experimental data from tests including thirty three specimens were employed in this research,and the reliability indices of the formulae were calculated by means of the second moment of first order method,which is used in the analysis of structural reliability.The results indicates that the reliability index of the calculation formula provided by Technical Specification for Steel Reinforced Concrete Composite Structures(JGJ 138-2001) is 4.647,which meets the requirement of the design value of reliability index.However,the reliability index of the formula from Specification for Design of Steel-Reinforced Concrete Structure(YB 9082-97) is 2.100,which does not meet the requirement.Therefore,to calculate the shear capacity of steel reinforced concrete beams,it is safe and reliable to apply the formula provided by Technical Specification for Steel Reinforced Concrete Composite Structures(JGJ 138-2001).