Evaluation of the most unfavorable combinations of simultaneous element forces, for the design of R/C cross sections subjected to isotropic seismic excitation

摘要

Earthquake induced element forces are in general vector systems, whose componentsvary in time, independently one from another. Consequently the components of the same responsevector reach their maximum value at a different time over the interval of structure’s vibration. R/Ccross sections subjected to combinations of two or more element forces need to be sized and detailedfor the “most unfavorable” one. A number of methods for determining the most unfavorablecombinations of simultaneous element forces are presented in this paper. Analytical results fromthe application of these methods to a six-story building are compared.