Study On Contribution And Earthquake Resistance Of Masonry Filling Wall To Frame Structure

Reinforced concrete frame structure with its adaptability and excellent economy has become one of common structures in our country. The infill-walls were usually arranged in the frame structures due to the use of founction.Studies shown that a complex interplay between the infill-wall and the frame structure. But in the code for seismic design of buildings consider infill-walls as non-structural components. Taken infill-walls as line load and multiplied by the reduction factor of0.6to0.7in consideration of the impact of infill-walls. In recent earthquakes shown that the contribution of infill-walls to the structure stiffness is not limited to this.In view of this situation. This article primary research the several points as below.1. Summarize the advantages and disadvantages of various calculation models and the seismic response analysis of structures.2.Using finite element software ABAQUS to conducted simulation analysis for mansory infilled frame structures. First, comparing the effects of ABAQUS/Standard and ABAQUS/Explicit to layer displacement and acceleration of the results and comparion the advantages and disadvantages of two analytical methods for model operation.7different finite element models are established according to the layout.3.From the model analysis the natural period and frequsncy of different models can be obtained. Then concluded that the impact on the frame structure natural period beyond the natural period reduction coefficient ranges given by the "Code for seismic design of buildings" and recommended to take0.5to0.8.4.From the dynamic time-history analysis the stress, damage, layer acceleration, layer displacement, interlayer displacement, drift ratio can be obtained. Analyzed the cause of all the differences and concluded that the infill-walls have a significant effect on Structural dynamic characteristics under earthquake when asymmetrical arranged of structure layer in the vertical direction.5.Theoretical analysis of the impact of connection between infill-walls and frame structural of the seismic performance, concluded that the main difference between flexible connection and rigid connection if in the the initial stiffness contribution stage, and then provide the same stiffness contribution after this stage. Analyzed the cause of weak layer and presented some corresponding structural measures.