This paper has primarily studied stress-lag effect for reinforced components by using the finite element method. The mature finite element analysis software ANSYS is selected as the calculation tool and the research object is a brick wall of reinforcing concrete splint. The concrete splints bear most horizontal seismic shear force for the stiffness of the new surface course is high. When seismic action occurs, the concrete splints may be broken before the brick walls. After compared the results of ANSYS and PKPM, the actual bearing capacity value of the concrete splints is smaller than the calculation results of the reinforcement design method by current codes for ignoring the influence of stress-lag effect.
Based on seismic analysis of concrete-masonry mixed structure, a new strengthening method will be introduced. In order to find the effective and reasonable reinforcement measures to adjust to the characteristics of the mixed structure, the method of equivalent stiffness should apply to the structure, it can change the original unreasonable force transmission route, and then transform and reinforce the original structure into a quasi-frame-shear wall structure whose force transmission route is similar to frame-shear wall structure. This could be a reference to similar projects.
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