Seismic resilience of the reinforcement system of unreinforced masonry in an individual building
An unreinforced masonry structure is prone to severe damage and collapse during earth-quakes because of its poor seismic resilience.In this study,seismic resilience was used as a pa-rameter index for analyzing the seismic capacity of the reinforcement of an unreinforced masonry structure.A finite element model for the unreinforced masonry structure in buildings was estab-lished using the software ANSYS.The input waves were the Wenchuan earthquake wave,the Hanshin earthquake wave in Japan,the Kern earthquake wave in the United States,the Chi-Chi earthquake wave in Taiwan,China,and an artificial earthquake wave.Resilience index and resili-ence grade were used in evaluating the seismic resilience of an unreinforced masonry reinforce-ment system in terms of repair cost,repair time,and personnel casualties after an earthquake.Results indicate that(1)the inter-story displacement,inter-story shear stress,and extent of damage in the unreinforced masonry structure are greater than those of the unreinforced masonry with reinforcement system during rare,fortification,and frequent earthquakes;(2)the maxi-mum seismic resilience index of the reinforced masonry structure is 0.877,and the minimum seis-mic resilience index of the unreinforced masonry with reinforcement system is 0.908 at different earthquake intensities;(3)the unreinforced masonry structure suffer from severe damage levels and heavy casualties and needs long time and high costs for post-disaster reconstruction when dif-ferent seismic waves are inputted.By contrast,the unreinforced masonry structure with a rein-forcement system has a high proportion of minor damage and few casualties and can be recon-structed in a short time with low costs.
reinforcement system of unreinforced masonryseismic resilienceindividual build-ingresilience index methodresilience grade method
万方数据
维普
