[1]于婧,贾会芳,张辉.钢-PVA纤维混凝土预制连梁抗震性能试验研究[J].西安建筑科技大学学报(自然科学版),2024,56(01):57-64.[doi:10.15986/j.1006-7930.2024.01.008]
　YU Jing,JIA Huifang,ZHANG Hui.Experimental study on seismic performance of Steel -PVA hybrid fiber reinforced concrete coupling beam[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2024,56(01):57-64.[doi:10.15986/j.1006-7930.2024.01.008]
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钢-PVA纤维混凝土预制连梁抗震性能试验研究()
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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:
56
期数:
2024年01期
页码:
57-64
栏目:
出版日期:
2024-02-28

文章信息/Info

Title:
Experimental study on seismic performance of Steel -PVA hybrid fiber reinforced concrete coupling beam
文章编号:
1006-7930(2024)01-0057-08
作者:
于婧1; 2; 贾会芳1; 张辉1
（1.西安建筑科技大学 土木工程学院，陕西 西安 710055；2.西部绿色建筑国家重点实验室(XAUAT)，陕西 西安 710055）
Author(s):
YU Jing1; 2;  JIA Huifang1;  ZHANG Hui1
（1.School of Civil Engineering, Xi ′an Univ. of Arch. & Tech., Xi ′an 710055, China;2.State Key Laboratory of Green Building in Western China, Xi ′an 710055, China）
关键词:
钢-PVA混杂纤维混凝土(SPHFC); 拟静力试验; 小跨高比预制连梁; 抗震性能
Keywords:
steel-PVA hybrid fiber reinforced concrete;  quasi-static test;  coupling beam;  seismic performance
分类号:
TU528.01
DOI:
10.15986/j.1006-7930.2024.01.008
文献标志码:
A
摘要:
为研究钢-聚乙烯醇混杂纤维混凝土（Steel -Polyvinyl Alcohol Hybird Fiber Concrete，简称SPHFC）预制连梁的抗震性能，对1个普通混凝土（RC）预制连梁试件和3个SPHFC预制连梁试件进行低周往复加载试验，分析预制连梁的破坏过程、破坏形态、滞回性能、刚度及耗能能力等抗震指标，研究连梁基体材料和截面宽度对其抗震性能的影响，阐明了SPHFC预制连梁的破坏机理.结果表明：RC预制连梁破坏时混凝土剥落现象严重，最终表现为剪切型破坏；SPHFC预制连梁破坏时几乎无混凝土剥落现象，充分发挥了纤维混凝土多裂缝开展的特点，最终发生弯剪型破坏；SPHFC预制连梁的承载力、延性、刚度和耗能能力均远高于RC预制连梁；分别增大SPHFC预制连梁基体强度或截面宽度，连梁承载力提高，延性和耗能能力略有降低.本文提出的新型SPHFC预制连梁各项抗震指标均显著优于普通RC预制连梁，且制作简便，轻质高强，便于预制吊装，可在装配式结构中推广应用.
Abstract:
In order to study the seismic performance of Steel-Polyvinyl Alcohol Hybird Fiber Concrete ( SPHFC ) precast coupling beams, a low-cycle reciprocating loading test was carried out on one ordinary concrete ( RC ) precast coupling beam specimen and three SPHFC precast coupling beam specimens to analyze the seismic indicators such as failure process, failure mode, hysteresis performance, stiffness, and energy dissipation capacity of the prefabricated connecting beams. The influence of the matrix material and section width of the connecting beam on its seismic performance was studied, and the failure mechanism of SPHFC prefabricated connecting beams was clarified. The results show that the concrete peeling phenomenon is severe when the RC prefabricated connecting beam is damaged, and ultimately manifests as shear type failure. There is almost no concrete spalling when the prefabricated coupling beam of SPHFC is destroyed, which fully shows the characteristics of multicrack development of fiber concrete, and finally bending-shear failure occurs. The bearing capacity, ductility, stiffness and energy dissipation capacity of SPHFC coupling beams are much higher than those of RC coupling beam. By increasing the material strength or cross-section width, the bearing capacity of coupling beam is improved, while the ductility and energy dissipation capacity are slightly reduced. The results show that the seismic performance of SPHFC coupling beam is significantly better than that of ordinary RC coupling beam, and the new SPHFC precast coupling beam is simple to manufacture, light in weight and high in strength, which is convenient for prefabrication and hoisting, and can be popularized and applied in assembled structures.

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备注/Memo

备注/Memo:
收稿日期:2022-12-19修回日期:2023-02-02
基金项目:陕西省自然科学基础研究计划一般项目（面上）（2020JM-487）；西部绿色建筑重点实验室自主研究课题（LSZZ202019）
第一作者:于婧(1982—)，女，博士，副教授，主要从事新型建筑材料及混凝土结构抗震的研究. E-mail:yujing1506@163.com
更新日期/Last Update: 2024-04-08