Mechanical properties of short rebar connectors in ultra-thin lightweight composite decks

IF 5.6 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2024-11-09 DOI:10.1016/j.engstruct.2024.119272

Shuwen Deng , Yingzhuo Liu , Xudong Shao , Hanwen Zhang , Lian Shen , Junhui Cao

引用次数: 0

Abstract

To address the challenge of shear connector applicability in ultra-thin Lightweight Composite Decks (LWCDs), a novel type of Short Rebar Connectors (SRCs) was proposed. With the height of 16–20 mm, the connectors are well-suited for ultra-thin LWCDs with Ultra-High-Performance Concrete (UHPC) thicknesses within 35 mm. The mechanical performance of SRCs was investigated through pull-out tests, static and fatigue push-out tests. The results demonstrate that SRCs exhibit excellent tensile and shear resistance, with the maximum pull-out and shear capacities of 80.4 kN and 948 kN, respectively. The shear stiffness of SRCs is twice that of traditional stud connectors. From fatigue push-out tests, a design strength of 69.2 MPa at 2 million cycles was obtained. Finite Element Method (FEM) calculations for practical bridge engineering SRCs layout recommend arranging SRCs with a spacing of 200 mm × 200 mm.

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超薄轻质复合材料甲板中短钢筋连接件的机械特性

为解决超薄轻质复合材料露台（LWCD）中剪力连接器的适用性难题，我们提出了一种新型短螺纹钢筋连接器（SRC）。这种连接器的高度为 16-20 毫米，非常适合超高性能混凝土（UHPC）厚度在 35 毫米以内的超薄 LWCD。通过拉拔试验、静态和疲劳推挤试验研究了 SRC 的机械性能。结果表明，SRC 具有优异的抗拉和抗剪性能，其最大拉出和剪切能力分别为 80.4 kN 和 948 kN。SRC 的剪切刚度是传统螺栓连接件的两倍。疲劳顶推试验得出，在 200 万次循环时的设计强度为 69.2 兆帕。针对实际桥梁工程 SRC 布局的有限元法（FEM）计算建议 SRC 的间距为 200 mm × 200 mm。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Structures 工程技术-工程：土木

CiteScore

10.20

自引率

14.50%

发文量

1385

审稿时长

67 days

期刊介绍： Engineering Structures provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. Particularly welcome are contributions dealing with applications of structural engineering and mechanics principles in all areas of technology. The journal aspires to a broad and integrated coverage of the effects of dynamic loadings and of the modelling techniques whereby the structural response to these loadings may be computed. The scope of Engineering Structures encompasses, but is not restricted to, the following areas: infrastructure engineering; earthquake engineering; structure-fluid-soil interaction; wind engineering; fire engineering; blast engineering; structural reliability/stability; life assessment/integrity; structural health monitoring; multi-hazard engineering; structural dynamics; optimization; expert systems; experimental modelling; performance-based design; multiscale analysis; value engineering. Topics of interest include: tall buildings; innovative structures; environmentally responsive structures; bridges; stadiums; commercial and public buildings; transmission towers; television and telecommunication masts; foldable structures; cooling towers; plates and shells; suspension structures; protective structures; smart structures; nuclear reactors; dams; pressure vessels; pipelines; tunnels. Engineering Structures also publishes review articles, short communications and discussions, book reviews, and a diary on international events related to any aspect of structural engineering.