论文部分内容阅读
根据Timoshenko梁剪切理论和模型试验数值模拟,分析了剪切变形对空心楼盖箱型构件挠度的影响;依据弹性薄板理论,对比了不同边界条件下多种拟板方法的思路和计算精度;提出了等效实心平板剪切模量的取用方法和实用的考虑剪切变形挠度的修正手段。分析结果表明:剪切变形对空心楼盖的影响远大于实心楼盖;规程拟板法优于其他拟板方法,但其挠度计算值与空心楼盖实际值存在误差;现有基于抗弯刚度相等的拟板方法不能正确反映空心楼盖的剪切变形大小。该文基于“剪切刚度相等”提出的剪切模量取用方法和挠度修正方法能同时适用于构造各向同性和构造各项异性空心楼盖,计算效果均优于其它拟板法。该文成果可供分析和设计时参考。
According to the Timoshenko beam shear theory and numerical simulation of model test, the influence of shear deformation on the deflection of box-shaped hollow-shaped floor members is analyzed. According to the theory of elastic thin plate, the ideas and calculation accuracy of various methods are compared under different boundary conditions. The method of obtaining the equivalent solid plate shear modulus and the practical correction method considering shear deflection are proposed. The analysis results show that the effect of shear deformation on the hollow floor is much larger than that of the solid floor; the procedure-based quasi-plate method is superior to other quasi-planar methods, but there is an error between the calculated deflection value and the actual value of the hollow floor; the existing one is based on the bending stiffness. The equivalent quasi-plate method can not accurately reflect the shear deformation of the hollow floor. In this paper, the shear modulus approach and deflection correction method proposed based on the equal shear stiffness can be applied simultaneously to constructing isotropy and constructing anisotropic hollow floor slabs. The computational results are better than those of other pseudo-plate methods. . The results of this article are available for analysis and design.