Seismic Performance of Asymmetric Oblique Weakly Connected Structures

LIAO Xuzhao; LAO Zhiyuan; WANG Yansong; SHI Kairong; LIU Weijia

doi:10.13512/j.hndz.2025.02.12

Abstract：Compared with conventional orthogonal connected structures,oblique connected structures exhibit more complex mechanical behaviors under seismic actions.The connection method between the connector and tow-ers serving as a critical influencing parameter.This study focused on an asymmetric oblique weakly connected struc-ture of dual connectors and predominantly conducted comparative analysis on seismic performance under the con-nection stiffness variation schemes of three kinds of bearings.The results indicate that:As the stiffness of each con-nector bearing increases,the natural vibration period of the structure decreases,while the variation amplitudes of base shear and displacement increase with the number of stiffness-modified bearings.The control effect on displace-ment increases in the direction with lower lateral stiffness.The load stress of the double-layer connector increases with bearing stiffness,while that of the single-layer connector shows no distinct pattern.Bearing relative displace-ment generally decrease,and the shear forces on the edge columns of towers connected to double-layer connectors exhibit a generally increasing trend along seismic action directions,whereas those connected to single-layer con-nectors demonstrate more complex load stress situations.When modifying unilateral bearing stiffness,the transla-tional vibration modes of corresponding main structures experience greater impacts,with relative displacements and edge column shear variations exceeding those on unmodified sides.Stiffness adjustment in individual connector minimally affects translational vibration modes and seismic responses of other connectors.Therefore,these conclu-sions provide valuable references for scheme selection and design of asymmetric oblique weakly connected struc-tures.