SRC-RC转换柱型钢延伸高度的试验与研究  

Experimental Analysis of Extension Length of Shape Steel in SRC-RC Transfer Column

作　　者：伍凯[1] 薛建阳[2] 赵鸿铁[2] 

机构地区：[1]河海大学土木与交通学院,南京210098 [2]西安建筑科技大学土木工程学院,西安710055

出　　处：《土木建筑与环境工程》2012年第5期102-108,115,共8页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金(51208175;50978217);中国博士后基金资助(2012M511186);中央高校基本科研业务费专项资金资助(2011B07714);教育部高等学校博士学科点专项科研基金(20096120110005);教育部留学回国人员科研基金(教外司留[1108]号);陕西省重点学科建设专项基金(E01003)

摘　　要：完成了12根SRC-RC转换柱试件和1根钢筋混凝土柱对比试件的低周反复荷载试验,对具有不同型钢延伸高度转换柱试件的抗震性能进行了研究。对比研究了不同型钢延伸高度转换柱试件的骨架曲线,分析了延性、承载能力、耗能能力及强度退化率随型钢延伸高度的变化情况。转换柱试件的位移延性系数随着型钢延伸高度的增加呈现出先升后降的规律,型钢延伸高度达到3/5倍的柱高时位移延性系数达到最大值;型钢的延伸高度对承载能力影响不大;影响转换柱试件耗能能力的因素较多,且各因素之间尚有耦合关系,3/5倍的柱高是较为合理的型钢延伸高度,此时试件的耗能能力较好且刚度和强度均保持了一定的稳定性;随着型钢延伸高度的增加,型钢与混凝土之间的粘结问题越突出,粘结裂缝的不稳定发展不但导致粘结破坏,而且使强度的稳定性越来越差,试件的强度退化率越来越小。Seismic performance of SRC-RC transfer column was analyzed based on experiment of 12 specimens of transfer columns and 1 RC specimen under low cyclic reversed loading,which mainly focused on the extension length of shape steel.Analysis and comparison on skeleton curves of specimens was carried out.Analysis was completed for ductility,bearing capacity,energy dissipation capacity and degeneration ratio of strength.Displacement ductility changes with the increase of extension length of shape steel,enhancing at first,then reducing,and reaching peak value when extension length is close to three fifths of column height.Extension length of shape steel has little effect on bearing capacity.Energy dissipation capacity of transfer columns has relationship with many factors.Three fifths of column height is rational for extension length of shape steel,and specimens have not only advanced performance of energy dissipation but also good stability of stiffness and strength in this condition.The bond performance between concrete and shape steel decreases with the increment of extension length of shape steel,and hence stability of strength decreases.

关 键 词：型钢混凝土 转换层 延性 耗能能力 

分 类 号：TU398[建筑科学—结构工程]