Anti-seismic performance and bearing capacity calculation method of point contact multi-gird composite wall

In order to research the work mechanism of multi-seismic defensive lines for multi-gird composite wall structure,a point contact multi-gird composite wall,where RC sash and X shape filling block as well as wallboard and external framework are connected at the corner,was proposed.In addition,the experimental study concerning the seismic performance of the point contact multi-grid composite wall was carried out.Through the analysis on the experimental results,the main failure modes and failure process of the proposed wall were studied.Such seismic performance as the hysteretic characteristic,bearing capacity and energy dissipation of the proposed wall was investigated.Moreover,the experimental results of point contact multi-gird composite wall were compared with those of standard wallboard.Meanwhile,the strain of steel bars in the wallboard was analyzed,and the calculation formula for the bearing capacity of point contact multi-gird composite wall was proposed.The results show that compared with the standard wall,the point contact multi-gird composite wall exhibits the slightly lower bearing capacity and energy dissipation performance.Because the transmission path and distribution relation of seismic action between different seismic defensive lines of the point contact multi-gird composite wall are relatively clear and the calculation model for the wall at different stages is simple,the control design of the multi-gird composite wall structure can be realized with the accurate analysis and calculation at each stage.Furthermore,both repair and replacement of the structural components after earthquake are much easier due to the separation of different defensive lines.