[1]刘博研,薛伟辰,孙 哲.界面构造对预制混凝土柱接缝抗剪性能的影响研究[J].西安建筑科技大学学报(自然科学版),2022,54(02):164-173.[doi:10.15986/j.1006-7930.2022.02.002]
　LIU Boyan,XUE Weichen,SUN Zhe.Influence of interface structures on shear performance of precast concrete column joints[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2022,54(02):164-173.[doi:10.15986/j.1006-7930.2022.02.002]
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界面构造对预制混凝土柱接缝抗剪性能的影响研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
54
期数:
2022年02期
页码:
164-173
栏目:
出版日期:
2022-04-28

文章信息/Info

Title:
Influence of interface structures on shear performance of precast concrete column joints
文章编号:
1006-7930(2022)02-0164-10
作者:
刘博研; 薛伟辰; 孙 哲
(同济大学 土木工程学院, 上海 200092)
Author(s):
LIU Boyan;  XUE Weichen;  SUN Zhe
(College of Civil Engineering, Tongji University, Shanghai 20092, China)
关键词:
预制混凝土柱;  接缝;  界面构造;  抗剪性能;  计算方法
Keywords:
precast concrete column;  joint;  interface structure;  shear performance;  calculation method
分类号:
TU398+.9
DOI:
10.15986/j.1006-7930.2022.02.002
文献标志码:
A
摘要:
开展了4个轴压比为0.4的预制混凝土柱接缝的抗剪试验,研究了界面构造(凿毛注浆、齿槽注浆、光面注浆、凿毛叠合)对接缝抗剪性能的影响.凿毛注浆和凿毛叠合界面的凹凸深度约6 mm; 齿槽注浆界面的齿槽深度约20 mm; 光面注浆界面的凹凸深度小于2 mm.试验结果表明:接缝试件均发生剪切破坏; 试件的荷载-滑移曲线可分为弹性、滑移、极限和破坏四个阶段; 叠合接缝的抗剪刚度为注浆接缝的6.02～6.76倍; 各注浆接缝的抗剪刚度接近,相差不超过10.9%; 叠合接缝的抗剪承载力为注浆接缝的1.38～1.85倍; 齿槽注浆、凿毛注浆接缝的抗剪承载力分别比光面注浆接缝高33.5%和14.9%; 提高界面粗糙度或设置齿槽可增强接缝的抗剪性能.基于试验结果和以往文献中的试验数据,分析了现有接缝抗剪承载力计算方法的适用性.发现现行规范中计算方法对凿毛叠合和齿槽注浆接缝的计算结果大多过于保守,对凿毛注浆和光面注浆接缝的部分计算结果偏于不安全.根据试验数据和对比结果,提出了考虑界面构造影响的预制混凝土柱接缝抗剪承载力计算方法.
Abstract:
Shear tests were conducted on four precast concrete column joint specimens under the axial compression ratio of 0.4 in order to investigate the influence of interface structures on their shear performance. Four specimens had different types of joints, including the grouting joint with rough interface, the grouting joint with shear keys, the grouting joint with smooth interface and the composite joint with rough interface. The depths of the rough interface, shear keys and smooth surface were approximately 6 mm, 20 mm and less than 2 mm, respectively. Results demonstrated that all specimens failed in shear mode. The load-slip curves of the specimens could be divided into four stages, namely the elastic stage, the slipping stage, the ultimate stage and the failure stage. The shear stiffness of the composite joints was 6.02～6.76 times that of the grouting joints. The shear stiffness of three grouting joints was similar, and the difference was nomore than 10.9%. The shear resistance capacity of the composite joints was 1.35～1.85 times that of the grouting joints. And these of the grouting joints with rough interface and shear keys were 33.5% and 14.9% higher than that of the grouting joints with smooth surface. It was concluded that the rough interface and shear keys led to superior shear performance. Based on the test results and the data from the existing research, the analysis was conducted on the applicability of the existing calculation methods for shear resistance capacity of joints. It was found that most existing methods gave conservative results for the grouting joints with shear keys and the composite joints with rough interface, and part of them gave unsafe results for the grouting joints with rough interface and smooth interface. Finally, taking the interface structures into consideration, a calculation method for shear resistance capacity of precast concrete column joints was proposed.

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备注/Memo

备注/Memo:
收稿日期:2021-04-01修改稿日期:2021-04-20
基金项目:国家自然科学基金项目(51878478,52130806)
第一作者:刘博研(1995—),男,硕士生,从事预制混凝土结构研究.E-mail:1732525@tongji.edu.cn 通信作者:薛伟辰(1970—),男,教授,博士,“长江学者”特聘教授,从事现代预应力结构、预制混凝土结构研究.E-mail:xuewc@tongji.edu.cn
更新日期/Last Update: 2022-04-28