可拆卸式钢-预制UHPC组合梁中高强螺栓剪力键的抗剪性能试验

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国家科技期刊平台
NETL
NSTL
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中文摘要：试验共设计 16 个推出试件,探究螺栓直径、螺栓等级、螺栓预紧力和剪力键类型对钢-预制超高性能混凝土(ultra-high performance concrete,UHPC)组合梁中高强螺栓剪力键抗剪性能的影响.试验结果表明,推出试件以剪力键剪断为主要破坏模式.螺栓剪力键的抗剪性能随螺栓的直径和螺栓等级的增大而提高;螺栓预紧力仅对初始抗剪刚度有影响;相比于传统焊钉剪力键,螺栓剪力键的单栓抗剪承载力有所下降,但整体抗剪性能仍满足结构性能要求.结合试验结果和国内外规范公式,提出一条更精确的计算公式用以预测钢-预制UHPC组合梁中螺栓剪力键的抗剪承载力.

外文标题：Shear performance tests of high-strength bolted shear connectors in demountable steel-prefabricated UHPC composite beams

外文摘要：A total of sixteen push-out tests were conducted in this study to explore the effects of bolt diameter,bolt grade,bolt pretension degree and shear connector type on the shear performance of high-strength bolts in steel-prefabricated ultra-high performance concrete(UHPC)composite beams.The experimental results indicated that the specimens were mainly failed in bolts fracture.The shear behavior of bolted shear connectors increased with the increase of bolt diameter and bolt grade.The pretension degree of bolt only affected the initial shear stiffness.Compared to traditional welded studs with the same diameter,the shear capacity of bolted shear connector decreased,while the overall shear performance met the requirements of structural mechanical properties.Combining experimental results with domestic and foreign standard formulas,a more accurate model was proposed to predict the shear bearing capacity of the bolted shear connector in the steel-prefabricated UHPC composite beam.

外文关键词：

high-strength bolts shear connectorsteel-prefabricated ultra-high performance concrete(UHPC)composite beamsdetachableshear resistance performance

作者：

吴锦鹏、吴加杰、曹志鹏、方壮城、姜海波

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作者单位：

广东工业大学土木与交通工程学院,广东广州 510006

广州大学土木工程学院,广东广州 510006

关键词：

高强螺栓剪力键钢-预制超高性能混凝土(UHPC)组合梁可拆卸式抗剪性能

基金：

国家自然科学基金资助项目中国博士后基金资助项目广东省基础与应用基础研究基金区域联合基金资助项目

项目编号：

522081562022M7208742022A1515110394

出版年：

2024

DOI：

10.7631/issn.1000-2243.23220

福州大学学报(自然科学版)

福州大学

福州大学学报(自然科学版)

CSTPCD北大核心

影响因子：0.35

ISSN：1000-2243

年,卷(期)：2024.52(4)