[1]管东芝,郭正兴,尹航,等.部分高强筋装配式框架梁柱连接塑性铰长度研究[J].东南大学学报(自然科学版),2019,49(4):645-651.[doi:10.3969/j.issn.1001-0505.2019.04.006]
　Guan Dongzhi,Guo Zhengxing,Yin Hang,et al.Study on plastic hinge length of precast beam-column connections reinforced partially with high-strength rebars[J].Journal of Southeast University (Natural Science Edition),2019,49(4):645-651.[doi:10.3969/j.issn.1001-0505.2019.04.006]
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部分高强筋装配式框架梁柱连接塑性铰长度研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
49
期数:
2019年第4期
页码:
645-651
栏目:
土木工程
出版日期:
2019-07-20

文章信息/Info

Title:
Study on plastic hinge length of precast beam-column connections reinforced partially with high-strength rebars
作者:
管东芝1; 2; 郭正兴1; 2; 尹航3; 杨辉1; 陈子轩1
1东南大学土木工程学院, 南京 210096; 2东南大学混凝土及预应力混凝土结构教育部重点实验室, 南京 210096; 3中建国际投资(江苏)有限公司, 南京 210000
Author(s):
Guan Dongzhi1; 2;  Guo Zhengxing1; 2;  Yin Hang3;  Yang Hui1;  Chen Zixuan1
1School of Civil Engineering, Southeast University, Nanjing 210096, China
2Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China
3China State Construction International Investments(Jiangsu)Ltd., Nanjing 210000, China
关键词:
装配式混凝土;  梁柱连接;  塑性铰;  试验;  计算模型
Keywords:
precast concrete;  beam-column connection;  plastic hinge;  test;  calculation model
分类号:
TU375.4
DOI:
10.3969/j.issn.1001-0505.2019.04.006
摘要:
考虑钢筋混凝土在地震作用下的受力特点,提出了拉-压综合塑性铰长度概念.针对部分高强筋装配式框架梁柱连接,开展低周反复荷载试验,研究了该连接的塑性铰特点,得出了拉-压综合塑性铰长度的试验结果.以Panagiotakos和Fardis模型为基础,提出了考虑预制形式、混凝土局部横向约束、钢筋相对强度和配筋率影响的改进型塑性铰长度模型.结果表明,部分高强筋装配式框架梁柱连接按照“强柱弱梁”原则设计,可以实现梁铰机制破坏,但破坏形态与现浇对比试件显著不同,梁端下部混凝土破坏主要发生在预制键槽内现浇混凝土部分,改进型塑性铰长度模型可以较好地计算部分高强筋装配式框架梁柱连接拉-压综合塑性铰长度,计算结果与试验结果误差在8%以下.
Abstract:
Considering the characteristics of concrete elements under earthquakes, the concept of tension-compression plastic hinge length was proposed. Aimed at the precast concrete beam-column connections reinforced partially with high-strength rebars, cyclic reversal loading tests were conducted, the plastic hinges of these connections were studied, and the experimental results of tension-compression plastic hinge length were obtained. Based on the Panagiotakos and Fardis model, a modified plastic hinge length model was put forward considering precast concrete details, the local confinement of concrete, yielding strength ratio of corresponding rebars and reinforcement ratios. The results show that the precast concrete beam-column connections reinforced partially with high-strength rebars, which are designed according to the “strong column-weak beam” principle, can exhibit the failure modes of the beam sideway mechanism. However, the failure modes of these connections are different from those of the monolithic specimen, and the damage at beam end bottom occurs mostly in the cast-in-situ concrete in the prefabricated shell. The modified plastic hinge length model can estimate the tension-compression plastic hinge length of the precast concrete beam-column connections reinforced partially with high-strength rebars. The errors between the calculated results and the experimental ones are below 8%.

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备注/Memo

备注/Memo:
收稿日期: 2018-12-12.
作者简介: 管东芝(1989—),男,博士,讲师;郭正兴(联系人),男,教授,博士生导师,guozx195608@126.com.
基金项目: 国家重点研发计划资助项目(2016YFC0701703)、国家自然科学基金资助项目(51808109、51678136)、江苏省自然科学基金青年基金资助项目(BK20180385).
引用本文: 管东芝,郭正兴,尹航,等.部分高强筋装配式框架梁柱连接塑性铰长度研究[J].东南大学学报(自然科学版),2019,49(4):645-651. DOI:10.3969/j.issn.1001-0505.2019.04.006.
更新日期/Last Update: 2019-07-20