摘要
为探究焊接栓钉型钢混凝土(stud steel reinforced concrete,SSRC)柱在压弯剪扭复合受力作用下的滞回性能及抗扭承载力计算方法,以型钢配钢率、纵筋配筋率、体积配箍率、栓钉间距和栓钉位置为变化参数,设计并完成了12根SSRC柱和1根对比柱的拟静力加载试验。观察了试件的破坏形态,获取了各试件的滞回曲线、骨架曲线、承载力、能量耗散、变形性能等抗震性能指标,分析了不同变化参数对上述指标的影响规律,提出了该类构件的抗扭承载力计算公式。结果表明:各变化参数对试件的破坏形态影响较小,所有试件呈现为明显的弯扭型破坏;试件的扭矩-扭转角滞回曲线存在明显的捏缩现象,表现为反“S”形,但弯矩-位移滞回曲线较为饱满,表现为梭形;型钢配钢率和体积配箍率对SSRC柱的抗扭及抗弯承载力影响较小;纵筋配筋率和栓钉间距对SSRC柱的抗扭承载力影响较大,最大提高幅度分别为12.29%、18.92%,但对SSRC柱的抗弯承载力影响较小;焊接栓钉能够显著增强型钢混凝土柱的延性及能量耗散能力;综合承载力、能量耗散、延性等抗震指标,建议栓钉采用X型焊接;最后,提出了SSRC柱抗扭承载力实用计算公式,计算结果与试验结果吻合良好。
Here,to investigate hysteresis performance and torsional bearing capacity calculation method of welded stud steel reinforced concrete(SSRC)columns under compression-bending-shear-torsion composite stress,taking steel reinforcement ratio,longitudinal reinforcement ratio,volume stirrup ratio,stud spacing and stud position as variable parameters,quasi-static loading tests for 12 SSRC columns and 1 contrastive column were designed and conducted.Failure modes of specimens were observed,and the seismic performance indexes of hysteresis curve,skeleton curve,load-bearing capacity,energy dissipation and deformation performance of various specimens were obtained.Effects of different variable parameters on the above indexes were analyzed,and a formula for calculating torsional bearing capacity of these SSRC columns was proposed.The results showed that effects of various variable parameters on failure mode of specimens was smaller,and all specimens exhibit obvious flexural-torsional failure;torque-torsion angle hysteresis curves of specimens have obvious pinch phenomena and exhibit an inverse"S"shape,but bending moment-displacement hysteresis curves are fuller and exhibit a shuttle shape;steel reinforcement ratio and volume stirrup ratio have little effect on torsional and flexural bearing capacity of SSRC columns;longitudinal reinforcement ratio and stud spacing have a significant impact on torsional load-bearing capacity of SSRC columns,the maximum increase amplitudes are 12.29% and 18.92%,respectively,but their impacts on flexural load-bearing capacity of SSRC columns are smaller;welded studs can significantly enhance ductility and energy dissipation capacity of SSRC columns;comprehensively considering aseismic indexes of load-bearing capacity,energy dissipation and ductility,it is recommended to use X-shaped welding for studs;the calculated results obtained using the proposed calculation formula for torsional bearing capacity of SSRC columns agree well with test results.
作者
陈宇良
张绍松
王双翼
叶培欢
吉云鹏
CHEN Yuliang;ZHANG Shaosong;WANG Shuangyi;YE Peihuan;JI Yunpeng(School of Civil Engineering and Architecture,Guangxi University of Science and Technology,Liuzhou 545006,China;Guangxi Engineering Research Center for Safety Prevention and Control of Assembly Structure,Guangxi University of Science and Technology,Liuzhou 545006,China;Key Laboratory of Disaster Prevention&Mitigation and Prestress Technology of Guangxi Colleges and Universities,Liuzhou 545006,China)
出处
《振动与冲击》
北大核心
2025年第5期218-229,共12页
Journal of Vibration and Shock
基金
国家自然科学基金(51908141)
中国博士后科学基金(2021M693854)
广西科技大学博士基金(校科博18Z09)。
关键词
型钢混凝土(SSRC)柱
压-弯-剪-扭
焊接栓钉
抗震性能
抗扭承载力
stud steel reinforced concrete(SSRC)column
compression-bending-shear-torsion
welded stud
seismic performance
torsional bearing capacity
