土木建筑工程

蜂窝组合梁-复合螺旋箍混凝土柱节点试验

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  • 1. 华南理工大学 土木与交通学院,广东 广州 510640; 2. 华南理工大学 亚热带建筑科学国家重点实验室,广东 广州 510640
马宏伟(1973-),男,博士,副教授,主要从事钢结构和组合结构研究.

收稿日期: 2016-03-18

  修回日期: 2016-06-21

  网络出版日期: 2016-11-01

基金资助

国家自然科学基金青年科学基金资助项目(50808084);亚热带建筑科学国家重点实验室开放课题(2015ZB29)

Experimental Investigation into Castellated Composite Beam-Compound Spiral Hoop Reinforced Concrete Column Connection

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  • 1.School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,Guangdong,China)
马宏伟(1973-),男,博士,副教授,主要从事钢结构和组合结构研究.

Received date: 2016-03-18

  Revised date: 2016-06-21

  Online published: 2016-11-01

Supported by

Supported by the National Natural Science Foundation of China for Young Scientists(50808084)

摘要

为推广组合梁 - 复合螺旋箍混凝土柱结构体系,提出了一种梁贯通式的蜂窝组合梁 - 复合螺旋箍混凝土柱节点,节点核芯区采用双 U 形箍筋贯穿梁腹板,并在梁上下翼缘位置设置柱短钢板箍. 对两个 1/2 缩尺的蜂窝组合梁 - 复合螺旋箍混凝土柱节点试件和一个模拟节点核芯区试件进行了低周反复荷载试验. 试验结果表明扩张比为 1. 2 的试件在非洞口处出现了钢梁的弯曲破坏,扩张比为 1. 3 的试件同时在洞口和非洞口处同时出现了钢梁的弯曲破坏. 提出了节点抗剪承载力计算公式,节点试件试验值与计算值吻合. 两个节点试件的荷载位移曲线呈理想的梭形,且延性系数分别为 4. 55 和 4. 30,等效粘滞阻尼系数分别为 0. 46 和 0. 38,说明节点有良好的抗震性能.

本文引用格式

马宏伟 林朗 刘和星 . 蜂窝组合梁-复合螺旋箍混凝土柱节点试验[J]. 华南理工大学学报(自然科学版), 2016 , 44(12) : 120 -127 . DOI: 10.3969/j.issn.1000-565X.2016.12.017

Abstract

In order to popularize the structure form consisting of the compostite beam and the compound spiral hoop-reinforced concrete (CSHRC) column,a beam-through-type connection of the castellated composite beam- CSHRC column is proposed.In the core zone of the connection,the U-shaped stirrups cross the beam web,while the short steel plate hoops of column are set at the beam top and the bottom flanges position.Through the low-cycle reversed loading experiments of two 1/2-scaled castellated composite beam-CSHRC column connection specimens and a simulating core zone specimen,it is found that the local buckling failure of the steel beam occurs near the column face for the specimen with an expansion ratio of 1. 2 while near the column face and the web opening for the specimen with an expansion ratio of 1. 3.Moreover,a formula of the shear capacity of the connection core zone is put forward,and the calculating values based on the formula accord well with the experimental ones.The two 1/2- scaled connection subassemblies both have an ideal spindle shaped load-drift hysteresis curve,and their ductility factors and equivalent viscous damping coefficients are respectively 4. 55,4. 30 and 0. 46,0. 38,which means that the proposed connection has a good anti-seismic behavior.

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