新型三向预应力钢筋混凝土桥墩抗震性能试验研究（论文）.pdf

第 49卷第 6期 2017年 12月 西安建筑科技大学学报(自然科学版) J．Xi an Univ．of Arch．＆Tech．f Natural Science Edition) Vo1．49 No．6 DOI：10．15986／j．1006—7930．2017．06．006 新 型 三 向 预 应 力 钢 筋 混 凝 土 桥 墩 抗 震 性 能 试 验 研 究 杨 勇 ， 张 锦 涛 ， 李 亚 宁 ， 李 辉 ， 叶 俊 ， 马 新 堡 (1．西安建筑科技大学 土木工程学院，陕西西安，710055；2．西安体育中心控股有限公司，陕西西安，710026) 摘要：为提高钢筋混凝土桥墩的自复位性能和抗震性能 ，先对钢筋混凝土桥墩施加竖向预应力，后采用预应力钢带对桥 墩施加横向双向预应力，形成三向预应力钢筋混凝土桥墩形式．结合 4个三向预应力钢筋混凝土桥墩试件和 2个普通钢 筋混凝土桥墩对比试件的低周反复加载拟静力试验 ，对三向预应力钢筋混凝土桥墩受力机理、自复位性能和抗震性能开 展了详细研究 ，并着重分析了试件的裂缝发展情况、破坏形态、滞回曲线 、骨架曲线 、耗能能力、延性和 自复位能力 ． 研究结果表明 ，所提出的新型三向预应力钢筋混凝土桥墩相对普通钢筋混凝土桥墩 ，是 自复位性能得到明显改善和 提高． 关键词：预应力钢筋混凝土；桥墩；三向预应力；抗震性能 ；自复位结构；试验研究． 中图分类号：TU378．3 文献标志码：A 文章编号：1006—7930(2017)06—0804—08 Experim ental study on seism ic perform ance of the three-direction prestressed reinforced concrete bridge piers YANG Yong ，ZHANG Jintao ，LI Yaning ，LI Hui ，YE Jun ，MA Xinbao (1．School of Civil Engineering，Xi an Univ．of Arch．& Tech．，Xi an，710055，China； 2．Xi an Sports Center Holdings LTD．，Xi an，710026，China) Abstract：To i’mprove the self-centering ability and seismic performance of reinforced concrete bridge piers，a new kind of three—direction prestressed reinforced concrete bridge pier was created and introduced，in which vertical prestressed steel rode and horizontal two—direction prestressed steel strips were both used to introduce three prestressed stress in the piers．Based on experimental results of four specimens of this new kind of three—direction prestressed reinforced concrete pier specimens and two control common reinforced concrete specimens without any prestressing，the self—centering performance，mechanical performance and seismic performance of the three— direction prestressed reinforced concrete pier were fully studied，which means the development of cracks，failure patterns，hysteretic curves，skeleton curves，energy dissipation，ductility and self-centering ability were mainly analyzed．According to the comparing analysis with that of two reinforced concrete bridge pier control specimens，it was found that the new three—direction prestressed reinforced concrete bridge piers seismic performance，especially self-centering ability，was obviously improved and made better． Key words：prestressed reinforced concrete；bridge pier；three—direction prestressed concrete；seismic performance； self-centering structures；experimental study 自复 位 结 构 (Self—centering structures， 自复 位 的 概 念 最 早 在 美 国 的 PRESSS研 究 计 划 中 提 出[1