框架短梁设计方法的探讨

Research on design method of frame short span beams

旨在解决地震高烈度区钢筋混凝土框架结构和框架-抗震墙结构抗震验算时,框架短梁出现的超筋问题.从分析短梁受力及变形特点入手,针对不同部位和不同功能,分别提出不同的简便可行的解决方案:对于受竖向荷载较小的一般部位的个别短梁,可采用折减梁刚度的办法;其他情况应采用调整相邻框架梁柱刚度的办法.采用的结构分析软件是PKPM-SATWE和广厦结构CAD-SSW.

The paper tried to give solution to the condition of having to allocate excessive reinforcement ratio in short span beams in the reinforced concrete frame and frame-shear wall constructions built in the high seismic fortification intensity when computing seismic capability of the building. First it analyzed the characteristic of deformation and strain of short span beams, then gave different solutions from positions and functions of short span beams. If short span beams are imposed with a very small value of vertical load and they are very few amount, depreciating the stiffness is viable; under other condition should adjust stiffness of the frame columns and beams nearby. The softwares used for computing are PKPM-SATWE and Guang Xia CAD-SSW.