Abstract： The elasto-plastic responses of 54 double-layer spherical reticulated shell models are calculated. The cross-sectional size of members in those reticulated shell models is determined by the structural full-stress design under non-seismic load cases, and also satisfied by the check of frequently occurred earthquake. The interaction between reticulated shell and its substructure is considered in numerical computation. An equivalent elasto-plastic hysteretic model, which can simultaneously deal with both the tensile yielding and the compressive buckling of bar element, is adopted. According to the results of numerical computation, the structural plastic region, magnitude of plastic strain and residual deformation effected by the span of shell, rise-span ratio, connection condition of abutment, layout of substructure and choice of ground motion are analyzed. The results reveal that the weak regions of double-layer spherical reticulated shells under rare earthquake are not quite near the abutments. For those reticulated shells strongly constrained by substructure or with longer span and high rise-span ratio, the members with residual plastic strain are mainly located in the inner annular region near the center of shell. The span of shell, rise-span ratio and connection condition of abutment are three main sensitive parameters to the distribution of plastic members and the magnitudes of their plastic strains. However, no collapse occurs for all numerical models under rare earthquake.
刘河江;邓 华. 罕遇地震下双层球面网壳的弹塑性动力响应分析[J]. , 2012, 31(24): 161-167.
LIU Hejiang; DENG Hua. Analysis on the elasto-plastic dynamic response of double-layer spherical reticulated shells under rare earthquake. , 2012, 31(24): 161-167.
2012, Vol. 31 
