Study On Different Connection Methods Of Masonry Structure With Framework Adding

Many buildings function of masonry in the last century in 90 s has been unable to meet the requirements,the demolition and reconstruction is neither economical nor practical.It is also compatible with our national conditions on the exacting masonry structure reinforcement and renovation and has obvious economic benefits.Especially to those longer multi-layer masonry,bearing ability is limited,so the extension story adding are becoming more and more popular.Firstly,this dissertation combined with the practical engineering of original brick structure to seismic appraiser,based on the result of seismic appraiser to reinforce the the original structure.Then use SAP2000 finite element software to establish finite element modal for the original structure and three different kinds of composite structure.(the two ends are fixed,the two ends are hinged,one end is fixed and another end is on hinged)and to run static analysis,modal analysis and seismic response spectrum analysis.By comparing the three different connection schemes of chain rod internal force,floor displacement,story drift and inter story shear to analyze the performance of original structure and composite structure.Based on the masonry structure and three different connection schemes of combined structure comparative analysis it can be known that :when the original structure and the outer structure is connected only in one direction,it should give priority to the connection scheme which is fixed at both ends or one end is fixed and another end is hinged.when the original structure and the outer structure is connected in two directions,it should give priority to the connection scheme which is hinged at both ends.Whether by which connection scheme should be avoided between the old and new structure on shear to transfer seismic force.