Influence of the Vertical Component of Yangbi Ground Motion on the Dynamic Response of RC Frame and Brick-Concrete Structure

An earthquake of magnitude 6.4 occurred in Yangbi County, Yunnan Province on 21 May 2021, with a focal depth 8 km, and strong ground motion vertical components was monitored by station (53YBX). A total 14,122 houses were damaged the earthquake, 232 them collapsed. Vertical motions have been gained more attention for its effect structure’s seismic response epicenter or near-fault regions at present. Taking three Yangbi, Chi-Chi, Loma Prieta as inputs, modeling based Perform-3D, this research carried out dynamic time history analysis an RC (reinforced concrete) frame structure brick-concrete under both horizontal working conditions. The results showed that had no evident impact top displacement acceleration two types structures. Among motions, component has largely influenced displacement, acceleration, axial force column bottom (or masonry wall bottom). different amplification effects pressure bending moment single structure, thus causing resonance floors amplifying floor. In addition, it considerably increase maximum tensile strain walls possibility faster failure structure. Influence bearing capacity columns should not be ignored. may provide reference earthquake-resistant design building structures, especially considering effect.