摘要
为了提高多高层钢结构中的抗侧力构件的延性和抗失稳能力,提出了钢板墙-控力不失稳支撑,由撑杆、内框架和嵌入其中的开设有镜像斜缝的两块薄钢墙板组成。为研究其抗震性能,对3个缩尺比例为2/3的模型进行拟静力试验,得到钢板墙-控力不失稳支撑的破坏模式、滞回特征、延性、耗能性能、承载力和刚度退化等,分析宽高比和内、外轴线间距比等参数对抗震性能的影响。试验结果表明:钢板墙-控力不失稳支撑具有稳定的滞回性能和良好的变形能力,极限层间位移角为1/13~1/10,位移延性系数为7.5~9.9;该支撑具有良好的抗失稳能力,在循环荷载下不会发生平面内和平面外失稳,承载力和刚度不会发生突变;该支撑的屈服顺序为墙板、内框架和撑杆,因内框架梁柱端部塑性区翼缘撕裂和墙板裂缝贯通导致其失去承载能力;镜像开设斜缝使每块墙板在循环荷载下始终单向受力,能有效发挥钢材的受拉性能,实现支撑的高延性;宽高比对屈服顺序和破坏模式影响小,增大内、外轴线间距比可以延缓墙板裂缝扩展、提高延性和累积耗能。
To enhance the ductility and buckling resistance of lateral force-resisting systems in multi-story steel structures,a steel plate wall force-controlled stabilizing brace was proposed.The steel plate wall force-controlled stabilizing brace consists of brace members,an inner frame,and two thin steel wall panels embedded with mirrored diagonal slits.Quasi-static tests were conducted on three 2/3 scaled specimens to evaluate its seismic performance.The tests yielded findings on the failure modes,hysteretic behavior,ductility,energy dissipation capacity,loadbearing capacity,and stiffness degradation of the steel plate wall force-controlled stabilizing brace,while analyzing the influence of key parameters,including the width-to-height ratio and the ratio of inner-to-outer frame spacing on the seismic performance.The test results demonstrate that the steel plate wall force-controlled stabilizing brace exhibits stable hysteretic behavior and excellent deformation capacity,achieving ultimate story drift angles of 1/13 to 1/10 and displacement ductility coefficients ranging from 7.5 to 9.9.The system shows remarkable buckling resistance,maintaining stability under cyclic loading without in-plane or out-of-plane buckling,and neither bearing capacity nor stiffness experiences abrupt changes.The yielding sequence follows a consistent pattern:wall panels yield first,followed by the inner frame and finally the brace members,with ultimate failure characterized by flange tearing at the plastic zone of the beam-column connections and through-thickness cracking of wall panels.The mirrored-slit configuration ensures that each wall panel maintains unidirectional force during cyclic loading,effectively utilizing the tensile properties of the steel to enhance system ductility.Although the width-to-height ratio shows minimal influence on the yielding sequence and failure modes,increasing the inner-to-outer frame spacing ratio is observed to delay crack propagation in wall panels while simultaneously improving both ductility and cumulative energy dissipation capacity.
作者
田炜烽
樊威军
张泽玉
余卫铮
郝际平
TIAN Weifeng;FAN Weijun;ZHANG Zeyu;YU Weizheng;HAO Jiping(School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an 710055,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education(XAUAT),Xi’an 710055,China)
出处
《建筑结构学报》
北大核心
2025年第9期107-118,共12页
Journal of Building Structures
基金
国家自然科学基金面上项目(52378189)
国家自然科学基金青年项目(51808436)。
关键词
钢结构
支撑
钢板剪力墙
失稳
拟静力试验
抗震性能
steel structure
brace
steel plate shear wall
instability
quasi-static test
seismic performance
