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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

42卷

期数:

2025年02期

页码:

16-26

栏目:

建筑结构

出版日期:

2025-03-20

文章信息/Info

Title:

Seismic performance analysis of prefabricated beam-column joints based on slot connections

文章编号:

1673-2049(2025)02-0016-11

作者:

张敏^1,2,金志超²,陈宜虎³,蒋鸿民⁴,卢旦⁵

(1. 桂林理工大学 广西绿色建材与建筑工业化重点实验室,广西 桂林 541004; 2. 桂林理工大学 土木工程学院,广西 桂林 541004; 3. 贺州学院 建筑与电气工程学院,广西 贺州 542899; 4. 广西建设职业技术学院 土木工程学院,广西 南宁 530007; 5. 华东建筑集团股份有限公司,上海 200002)

Author(s):

ZHANG Min^1,2, JIN Zhichao², CHEN Yihu³, JIANG Hongmin⁴, LU Dan⁵

关键词:

卡槽连接;  装配式梁柱节点;  抗震性能;  试验研究

Keywords:

slot connection;  prefabricated beam-column joint;  seismic performance;  experimental research

分类号:

TU375

DOI:

10.19815/j.jace.2023.08061

文献标志码:

A

摘要:

为简化节点构造,防止由于节点区钢筋过密而影响混凝土的浇筑,提出一种卡槽连接的梁柱节点。通过低周反复加载试验,将一个现浇节点与两个卡槽连接节点进行对比,研究了各节点试件的滞回曲线、骨架曲线、刚度退化、耗能能力等抗震性能指标。在试验基础上,用ABAQUS软件对各试件进行有限元分析,并对卡槽上部端板厚度进行参数拓展分析。结果表明:使用C30混凝土灌注的卡槽连接节点承载力接近现浇节点,但由于卡槽上部端板出现应力集中而发生起拱,导致卡槽周围混凝土破坏,增加了钢筋与混凝土之间的滑移,最终导致滞回曲线的捏缩现象明显,且刚度、耗能等指标也不如现浇节点; 使用高强灌浆料的卡槽连接节点时,由于灌浆料的抗压强度较高,且灌浆料在卡槽内处于三向受压状态,随着围压的增加,其极限抗压强度会得到明显的增强,由卡槽上部端板变形产生的对灌浆料的破坏作用有所减小,保证了钢筋和灌浆料之间的协同工作,其滞回曲线相对饱满,刚度及耗能也得到改善,抗震性能与现浇节点相当,能够满足实际工程的需求; 模拟的骨架曲线及试件破坏特征与试验结果吻合较好,卡槽上部端板的厚度会影响试件的初始刚度及承载力。

Abstract:

In order to simplify joint construction and prevent concrete pouring from being affected by excessive steel reinforcement in the joint area, a beam-column joint with slot connection was proposed. By conducting low cycle repeated loading tests, a cast-in-place joint was compared with two slot connection joints to study the seismic performance indicators such as hysteresis curve, skeleton curve, stiffness degradation, and energy dissipation capacity of each joint specimen. Based on the experiment, finite element analysis was conducted on each specimen using ABAQUS software, and parameter expansion analysis was performed on the thickness of the upper end plate of slot. The results show that the bearing capacity of the joint connected by C30 concrete pouring is close to that of the cast-in-place joint, but due to stress concentration on the upper end plate of the joint, arching occurs, causing damage to the concrete around the joint and increasing the slip between the steel bars and the concrete. Ultimately, this leads to significant shrinkage of the hysteresis curve, and the stiffness, energy dissipation, and other indicators are not as good as those of the cast-in-place joint. Due to the high compressive strength of the grouting material and the grouting material is in a triaxial compression state inside the slot, the ultimate compressive strength of the slot connection joint using high-strength grouting material will be significantly enhanced with the increase of confining pressure. The destructive effect on the grouting material caused by the deformation of the upper end plate of the slot is reduced, ensuring the coordinated work between the steel bars and grouting material. Its hysteresis curve is relatively full, and its stiffness and energy dissipation are also improved. Its seismic performance is comparable to that of cast-in-place joints, which can meet the needs of practical engineering. The simulated skeleton curve and the failure characteristics of the specimen are in good agreement with the experimental results. The thickness of the upper end plate of the slot can affect the initial stiffness and bearing capacity of the specimen.

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相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2023-08-18
基金项目:国家自然科学基金项目(51868014); 广西重点研发计划项目(桂科AB22036001); 广西重点实验室基金项目(桂科能17-J-21-9)
作者简介:张 敏(1980-),男,工学博士,教授,E-mail:emailzm@126.com。
通信作者:卢 旦(1978-),男,工学博士,教授级高级工程师,E-mail:dan_lu@arcplus.com.cn。
Author resumes: ZHANG Min(1980-), male, PhD, professor, E-mail: emailzm@126.com; LU Dan(1978-), male, PhD, senior engineer, E-mail: dan_lu@arcplus.com.cn.

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更新日期/Last Update: 2025-03-20