圆形截面高强混凝土柱抗震性能试验研究  

Seismic Performance Test Study on Circular HSC Columns Confined with High-Strength PC Rebar

作　　者：阎石[1] 张曰果[1] 王旭东[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2006年第4期538-542,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：辽宁省教育厅基金项目(2004D246);沈阳市科学技术计划项目(1032045-3-01)

摘　　要：目的研究圆截面高强混凝土柱的抗震性能和破坏机理,以提高建筑结构的抗震性能.方法通过6根配有强度等级为1 420 MPa的预应力钢棒作箍筋及纵筋、混凝土强度等级分别为C90和C60的高强混凝土圆截面柱,在低周反复荷载下的模型试验,研究了轴压比、箍筋(包括含箍特征值、箍筋间距、箍筋种类)、纵筋和混凝土强度等级等参数对抗震性能的影响.结果试验明确了C90和C60高强混凝土圆截面柱的破坏机理.通过对配置的PC钢棒作箍筋和部分作纵向受力筋的高强混凝土柱的位移延性比与轴压比和含箍特征值关系的经验计算公式的计算,并与实测值相比较,二者吻合良好.结论试验证明,配置PC钢棒作箍筋和部分作纵筋可明显改善高强混凝土圆截面柱的延性性能和抗震能力.The purposes of this paper were focused on seismic performances of circular HSC columns confined with high - strength PC rebar. The experiment for 6 model specimens, which the yield strength of PC rebar was 1 420 MPa and concrete grades were C60 and C90 respectively, was carried out under the low circle loads. The influence factors on the seismic performances of the columns were researched by using varieties parameters of axial compression ratios, stirrup reinforcements （index, space and type）, longitudinal rebar and concrete grades. The failure mechanisms were clarified and were also determined experimentally. An empirical formula represented the relationship of the displacement ductility, the compressive ratio and index of stirrup is derived numerically on the basic of the test data. The results of the test show that the ductility of the HSC columns can be effectively improved by use of ultra high strength steel bars for the partial of longitudinal reinforcement and stirrup.

关 键 词：高强钢筋 高强混凝土圆截面柱 延性 抗震性能 

分 类 号：TU352.1[建筑科学—结构工程]