加劲T形钢管约束混凝土柱滞回性能研究

发布时间：2018-01-10 05:16

本文关键词：加劲T形钢管约束混凝土柱滞回性能研究　出处：《地震工程与工程振动》2017年05期 　论文类型：期刊论文

【摘要】：异形柱框架结构较传统框架结构能有效地改善建筑内部的使用空间,但目前应用较多的钢筋混凝土异形柱结构在抗震性能方面限制较严,制约了其进一步的推广和应用。加劲钢管约束混凝土异形柱可有效提高核心混凝土的约束作用,改善其滞回性能。为研究加劲T形钢管约束混凝土柱的滞回性能,进行了2个T形组合柱的压弯滞回性能试验研究。试验结果表明:外包钢管越长,试件的承载力和延性也相应越高;相比T形钢筋混凝土柱,T形钢管约束混凝土柱的刚度、承载力以及耗能性能均明显提高;对拉钢筋加劲肋能有效限制钢管局部屈曲和阴角处钢管与混凝土脱开。提出了适合T形钢管约束混凝土柱的数值分析程序并将数值程序计算所得的水平荷载-位移曲线与试验曲线对比,吻合较好。
[Abstract]:Compared with traditional frame structure, special-shaped column frame structure can effectively improve the use of space inside the building, but the reinforced concrete special-shaped column structure which is widely used at present is more restricted in seismic performance. Restricted its further promotion and application. Stiffened steel tube confined concrete special-shaped columns can effectively improve the constraint of core concrete. In order to study the hysteretic behavior of stiffened T-shaped steel tube confined concrete columns, two T-shaped composite columns are tested and studied. The experimental results show that the length of the wrapped steel pipe is longer. The bearing capacity and ductility of the specimens are also higher. Compared with T-shaped reinforced concrete columns, the stiffness, bearing capacity and energy dissipation performance of T-shaped steel tube confined concrete columns are obviously improved. The local buckling of steel tube and the release of steel tube from concrete at underside corner can be effectively restricted by the stiffening rib of tensile steel bar. A numerical analysis program suitable for T-shaped steel tube confined concrete column is put forward and the horizontal load-potential calculated by the numerical program is put forward. The shift curve was compared with the test curve. The match is better.
【作者单位】：兰州大学土木工程与力学学院;甘肃省交通规划勘察设计院有限公司;重庆大学土木工程学院;
【基金】：国家重点研发项目(2016YFC0701200)~~
【分类号】：TU398.9
【正文快照】： 引言钢管约束混凝土柱是在薄壁钢管内填充混凝土后将钢管在柱子顶部和底部断开,钢管不承担纵向荷载,主要对核心混凝土起横向约束的一种新型组合柱。钢管约束混凝土柱在外在形式上与钢管混凝土柱相似,但是其受力性能与钢管混凝土柱有着本质的区别。国内外学者对方形和圆形钢管

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