Calculation of Shear Capacity of SRC Joints Based on Softening Effect
According to the existing test data,the shear bearing capacity calculation formula of medium steel concrete joints in the Technical Specification for Steel Reinforced Concrete Structures(YB 9082-2006)and the Code for Design of Composite Structures(JGJ 138-2016)are calculated.The results show that the calculation results in the code are conservative and have a large dispersion,mainly because the value of the concrete item is too simplified,resulting in a large dispersion of the calculation results.Based on the softening effect,considering the weakening effect of the main tensile direction on the strength of the main compressive direction,the influence of concrete strength,stirrup ratio,section steel restraint strength,axial compression ratio and other factors is quantitatively analyzed,and a modified formula for the concrete term in the shear bearing capacity calculation formula is proposed.The results show that the proposed formula can reasonably consider the influence of various factors,improve the accuracy of the calculation results and reduce the dispersion.
steel reinforced concreteshear bearing capacity of jointsoftening effect
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