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首页> 外文期刊>Magazine of Concrete Research >Flexural and shear capacities of semi-precast RC beams with embedded steel connections
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Flexural and shear capacities of semi-precast RC beams with embedded steel connections

机译：带有嵌入式钢连接的半预制RC梁的抗弯和抗剪承载力

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摘要

This paper proposes two types of semi-precast reinforced-concrete (RC) beams with steel connections embedded at each end. The proposed beams are designed to address the problems of complex detailing and construction difficulties between concrete-filled steel tubular columns and conventional RC beams. The proposed beams are composed of two steel I-beams partially embedded into the end sections of the RC beams. Full-scale experiments were carried out on the two proposed beams and a reference conventional RC beam to study the failure mode, crack propagation and flexural and shear strengths. Results indicated that the flexural strength of the proposed beams was well predicted by the current design codes on concrete structures including GB 50010, ACI 318-11 and BS EN 1992-1-1 (Eurocode 2). To further examine the shear behaviour of proposed beams, six experiments with two different shear span-to-depth ratios were conducted. The influence of the embedded steel connections on the shear behaviour was investigated and a correction coefficient for the shear span-to-depth ratio was proposed. Based on the current design codes on concrete structures, modified equations for calculating the shear strength were proposed. Finite-element methodology was also adopted to simulate the structural behaviour of the embedded steel connections under combined bending and shear force. Based on numerical findings, design methods for the embedded steel connections were recommended.
机译：本文提出了两种类型的半预制钢筋混凝土（RC）梁，其两端均嵌有钢连接。提出的横梁旨在解决混凝土钢管柱和常规RC梁之间复杂的细节设计和施工困难的问题。提议的梁由两个部分嵌入RC梁端部的钢工字梁组成。在建议的两个梁和参考常规RC梁上进行了全面试验，以研究破坏模式，裂纹扩展以及弯曲和剪切强度。结果表明，目前的设计规范对包括GB 50010，ACI 318-11和BS EN 1992-1-1（欧洲规范2）在内的混凝土结构，可以很好地预测所提议梁的抗弯强度。为了进一步检查提议的梁的剪切特性，进行了六个具有两个不同剪切跨度-深度比的实验。研究了嵌入式钢连接对剪切行为的影响，并提出了剪切跨度与深度之比的校正系数。根据现行的混凝土结构设计规范，提出了计算抗剪强度的修正公式。还采用有限元方法来模拟在组合弯曲和剪切力作用下嵌入式钢连接的结构行为。基于数值结果，推荐了嵌入式钢连接的设计方法。

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  • 来源
    《Magazine of Concrete Research》 |2019年第16期|827-846|共20页
  • 作者

    Liu Changyong; Wang Yuyin; Chan Tak-Ming; Wang Qinghe;

  • 作者单位

    Harbin Inst Technol, Minist Educ, Key Lab Struct Dynam Behav & Control, Harbin, Heilongjiang, Peoples R China|Harbin Inst Technol, Minist Ind & Informat Technol, Key Lab Smart Prevent & Mitigat Civil Engn Disast, Harbin, Heilongjiang, Peoples R China;

    Harbin Inst Technol, Minist Educ, Key Lab Struct Dynam Behav & Control, Harbin, Heilongjiang, Peoples R China|Harbin Inst Technol, Minist Ind & Informat Technol, Key Lab Smart Prevent & Mitigat Civil Engn Disast, Harbin, Heilongjiang, Peoples R China;

    Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China;

    Shenyang Jianzhu Univ, Sch Civil Engn, Shenyang, Liaoning, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    beams girders; modelling; structural design;

    机译：梁和大梁;建模;结构设计;

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