建筑结构学报2025，Vol.46Issue(6)：83-95,13.DOI:10.14006/j.jzjgxb.2024.0320
防屈曲分级屈服型金属阻尼器抗震性能与屈曲约束设计方法研究
Research on seismic performance and buckling constraint design method of buckling restrained graded yielding metal damper
摘要
Abstract
To enhance the energy dissipation capability of metal dampers and mitigate the out-of-plane buckling of shear dissipation plates,a buckling restrained graded yielding damper(BRGYD)was proposed.The BRGYD consisted of shear energy dissipation plate,bending energy dissipation plates and constraint plates.Under frequent earthquake conditions,shear dissipation plate yielded first to dissipate energy,while bending dissipation plates exhibited yielding behavior during design or rare earthquake events.This configuration equipped the damper with multi-stage defense mechanisms,enabling hierarchical energy dissipation under varying seismic intensity levels.Restraint plates,placed in parallel on either side of the shear dissipation plate,was served to prevent its buckling deformation.To evaluate the seismic performance of the BRGYD,four test specimens were designed and subjected to cyclic loading tests.The results indicate that the buckling mode of the shear dissipation plate transitions from lower to higher orders as the restraining force increases.Restraining the flexural deformation of the shear energy dissipation plate enhances its load-bearing capacity by 27.2％.The hysteresis curves of the BRGYD are fuller,indicating superior energy dissipation capability.The out-of-plane stiffness of the constraining plate governs the buckling behavior of the shear dissipation plate.Enhancing this stiffness leads to an 83.61％reduction in out-of-plane displacements.Both shear and bending dissipation plates effectively achieve the intended graded yielding objectives.The design method of the restrained plate and its recommended values of allowable deformation were determined.Through experimental and finite element analysis,the out-of-plane deformation of dampers with varying constraining plate thicknesses was investigated.The results verify the effectiveness of the constraining plate design method,providing valuable references for practical engineering applications and design.关键词
金属阻尼器/防屈曲/分级屈服/拟静力试验/抗震性能Key words
metal damper/buckling restraint/graded yielding/quasi-static test/seismic behavior分类
土木建筑引用本文复制引用
张智勇,门进杰,王家琛,范栋鑫,乔德浩..防屈曲分级屈服型金属阻尼器抗震性能与屈曲约束设计方法研究[J].建筑结构学报,2025,46(6):83-95,13.基金项目
国家自然科学基金项目(52178160). （52178160）
