Investigation On Global Collapse Resistance Capacity Of RC Frame Subjected To Severe Earthquake Considering Shear Effect

Earthquake is a devastating natural disaster, the energy released often brought a dramatic, even catastrophic damage to the building. In the earthquake, the collapse of the building structure, usually brings a lot of casualties and property losses, such as occurred in China in recent years, WenChuan and Yushu earthquake brought huge losses. The main reasons causing the collapse of buildings include strength and stiffness degradation and the effects of seismic shear strength. How to prevent the collapse of buildings under earthquake action is a topic of current engineering need to be thought about, where an accurate assessment of structures under earthquake or earthquake action against overall collapse capacity is one of the most critical scientific questions of these.This article describes the nonlinear time history analysis which must be evaluated in the structure collapse resistance, focusing on the theory and nonlinear time history analysis method for establishing and solving dynamic equations, also made a detailed presentation platform to the nonlinear analysis software OpenSees.Finally build a five-story three-span reinforced concrete frame structure with OpenSees for modeling and analysis, considering the shear effect, through build the finite element fiber model, taking one of them specimens of RC plane framework to do modal analysis, nonlinear dynamic time history analysis, pushover analysis and incremental dynamic analysis, modal analysis obtained the vibration mode of its first12cycles and modes, got the damping, obtained the displacement curves between floors and floor displacement angle curve through dynamic nonlinear time history analysis with three seismic waves, pushover analysis obtained the base shear-displacement curve. Finally, according to the principles of ATC-63select ground motion records selected24ground motion recordsfor incremental dynamic analysis, anti-collapse probability curve framework, whereby the overall collapse of the ability of anti-frame structures were assessed.