RELATION BETWEEN LOAD-CARRYING CAPACITY AND SEISMIC MOTION LEVEL OF DYNAMIC COLLAPSE FOR LATTICE ARCH AND CYLINDRICAL ROOF

Abstract

Lattice structures consisting of various mesh patterns show different static buckling and post-buckling behaviors even if the compression members have the same slenderness ratios. There are not sufficient studies in the literature to finding document to know the effect of these static characteristics on the seismic resistant capacity. In this paper as for plane lattice arches and double-layer cylindrical lattice roofs, the relation between dynamic collapse behavior and static collapse behavior, under excessive vertical loads, is numerically investigated to present a prediction method for the load level of dynamic collapse. The prediction method can be done with the information of load-deformation curves, natural periods and velocity response spectrum of seismic motions. The value predicted may be modified with the information of the elastic and plastic strain energies at a limit state of structures.