Experimental study on the mechanical performance of prefabricated concrete beam-column joints with different connection forms

ZHANG Jianxin; LI Chenchen; RONG Xian; ZHANG Biao

doi:10.11835/j.issn.2096-6717.2021.131

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Experimental study on the mechanical performance of prefabricated concrete beam-column joints with different connection forms

Civil Engineering | 更新时间：2023-03-07

- Experimental study on the mechanical performance of prefabricated concrete beam-column joints with different connection forms
- Journal of Civil and Environmental Engineering Vol. 45, Issue 2, Pages: 123-130(2023)
- 作者机构：
  
  1.河北工业大学，土木与交通学院，天津 300401
  2.河北工业大学，河北省土木工程技术研究中心，天津 300401
- 作者简介：
  
  ZHANG Jianxin (1986- ), PhD, main research interest: structure seismic, E-mail: zhangjianxin505@126.com.
- 基金信息：
  
  Natural Science Foundation of Hebei Province(E2021202012;E2018202290;E2020202134);from High-Level Talents Project of Hebei Province(B2017003003)
- DOI：10.11835/j.issn.2096-6717.2021.131
  CLC： TU374
- Received：01 March 2021，
  
  Published：25 April 2023
- 稿件说明：
移动端阅览
ZHANG Jianxin, LI Chenchen, RONG Xian, et al. Experimental study on the mechanical performance of prefabricated concrete beam-column joints with different connection forms[J]. Journal of Civil and Environmental Engineering, 2023, 45(2): 123-130.
DOI：

ZHANG Jianxin, LI Chenchen, RONG Xian, et al. Experimental study on the mechanical performance of prefabricated concrete beam-column joints with different connection forms[J]. Journal of Civil and Environmental Engineering, 2023, 45(2): 123-130. DOI： 10.11835/j.issn.2096-6717.2021.131.

摘要

为研究不同连接形式的装配式混凝土梁柱节点受力性能，对1个现浇混凝土节点和2个装配式混凝土梁柱节点试件进行循环往复加载试验，分析节点的破坏特征、梁端弯矩—转角、节点核心区剪力—梁端转角、刚度退化、钢板的应变等。结果表明：方钢管连接的装配式混凝土节点呈梁端弯曲破坏，设置端板和水平连接板的装配式节点和现浇节点呈节点核心区剪切破坏。装配式节点的梁端弯矩和节点剪力显著提高，梁端转角显著增加，节点核心区剪切变形减小，刚度退化变缓，受力性能得到明显改善。在节点核心区设置方钢管和十字隔板作为钢骨架的节点受力性能最佳，远优于现浇节点。在节点核心区加入钢连接件，预制梁端设置预埋工字钢，现场采用焊接或者栓接装配，后浇连接区混凝土，这种连接形式能够有效传力，提升装配式节点的受力性能。

Abstract

To study the mechanical performance of prefabricated concrete beam-column joints with different connection forms

the cyclic loading test for one monolithic concrete joint and two prefabricated concrete beam-column joints were conducted to evaluate the damage characteristics

beam end's moment-rotation

joint core shear force-beam end's rotation

stiffness degradation and strain of steel plates. The results show that the prefabricated concrete joint with square steel tube experienced flexural damage

and the prefabricated joint with end plates and horizontal connection plates and monolithic joint presented shear damage at the joint core. The bending moment and shear force of prefabricated joints significantly increased

while shear deformation in the core area decreased

stiffness degradation constrained

and the rotation in the beam end significantly enhanced

thus the mechanical performance significantly improved. The joint with square steel tube and orthogonal steel plate had the best mechanical performance

which was much better than that of the monolithic joint. The connection forms in which steel connectors were added to the joint core region

H-steel was set in the beam end

welded or bolted connection were used on site

and post-casting concrete was poured in the connection area could effectively transfer force and improve the mechanical performance.

关键词

Keywords

references

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