Study On Sesimic Performance Of Different Module Arrangement Of Integrsted Modular Steel Structures

Modular structure has gradually become a development trend of the construction industry due to its high degree of industrialization,green environmental protection and high quality.However,Pure modular structure(PMS)is mostly used in non-seismic zones currently.They are mostly low-rise or multi-storey buildings which are used in anti-seismic-zones,and the arrangement form of the building is relatively simple.In order to make the PMS be used in the anti-seismic-zones,improve its maximum height,and expand its application range,this paper takes integrsted modular steel structure(IMSS)which is commonly used at present as the research object,and analysed the seismic performance of IMSS with different arrangements.The major research work and achievements are as follows:(1)A simplified hysteretic model of corrugated steel plate shear walls(CSPSWs)which are used as the main lateral resistant system for IMS was proposed in this paper.The calculation formulas of key points on skeleton curves and hysteretic curves were given.The corresponding calculation procedure was developed based on the user subroutine UMAT provided by ABAQUS.The accuracy of simplified model was proved both at component level and structure level.It was verified that this simplified hysteretic model can balance the calculation accuracy and computational efficiency,and build a foundation for the analysis of the sesimic performance of integrsted modular structures.(2)The natural vibration characteristics,response under the action of frequently and seldomly occurred earthquake action of IMSS in parallel arrangement which are widely used were analysed.Through the analysis the seismic performance of this arrangement form was obtained.Furthermore,the influence of the number of CSPSWs on the seismic performance of the structure was analyzed.The results indicated that since the longitudinal direction of the structure had a large hole,the lateral stiffness of the structure was small,and the overall deformation was shear-type.Under the same steel consumption,the response of the structure under earthquake action was minimal when the CSPSWs were arranged in the longitudinal direction of the stair modular.(3)The seismic performance of IMSS with different staggered arrangement forms were analysed,and were compared with the IMSS in parallel arrangement.The results indicated that the staggered arrangement can solve the problem in some extent that the rigidity of two-direction is not consistent in parallel arrangement.The seismic performance of IMSS with intermediate modules staggered is better.