首页> 外文OA文献 >Experimental and analytical study of the shear transfer in composite shallow cellular floor beams
【2h】

Experimental and analytical study of the shear transfer in composite shallow cellular floor beams

机译:复合浅层地板梁剪切传递的试验与分析研究

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

This research investigated the longitudinal shear transfer mechanism in composite shallow cellular floor beams. The shear transfer mechanism is different with the headed shear studs used in composite construction. The shear resisting properties and behaviour of the shear transfer mechanism has not been studied previously. Experimental and analytical studies were carried out with the aims of improving and optimizing the design details, and advancing the method of shear connection in shallow floor beam construction. The composite shallow cellular floor beam investigated in this research is a new type of beam fabricated by welding two highly asymmetric cellular tees along the web. The shear connections of this type of composite beam are formed by the web openings, which transfer longitudinal shear force. Four types of these shear connections were studied: concrete-infill-only, tie-bar, ducting and web-welded-stud shear connections. In total, 24 push-out tests were performed in two test series to investigate the load-slip behaviour and shear resistance of the shear connections under direct shear force. The failure mechanisms of the two forms of shear connections were extensively studied, which lead to the development of a design method for the composite action. The concrete infill element passing through the web opening is subject to a complex three-dimensional stress state, and it is difficult to analyse it using the mathematical model rather than empirical formula. Finite Element Analysis of the concrete-infill-only shear connection was performed with a parametric study to further verify the design method that has been developed. Two flexural tests were carried out on a full-scale composite shallow cellular floor beam with a solid slab. The shear connections investigated in the flexural tests were: concrete-infill-only and tie-bar shear connections passed through the web. The behaviour and performance of the shear connections in the flexural tests were compared with those in the push-out tests. The degree of shear connection of the two flexural tests was determined in the back analysis using plastic theory with measured material properties. Based on the findings of the push-out tests and flexural tests, two design methods of deflection check and moment resistance were developed for composite shallow cellular floor beams at the serviceability limit state and the ultimate limit state respectively. The deflection check design method is based on the uncracked section properties of the composite beam. The moment resistance design method developed in this thesis is compatible with the design methods of BS5950 and Eurocode 4 (EC4).
机译:这项研究研究了复合浅蜂窝楼板梁中的纵向剪切传递机理。剪切传递机制与复合结构中使用的带头剪切螺柱不同。先前尚未研究过剪切传递机构的抗剪切特性和行为。进行了实验和分析研究,目的是改善和优化设计细节,并改进浅层横梁施工中的剪力连接方法。这项研究中研究的复合浅蜂窝楼板梁是一种新型的梁,它是通过沿腹板焊接两个高度不对称的蜂窝三通制成的。这种类型的复合梁的抗剪连接由传递纵向剪力的腹板开口形成。研究了四种类型的剪切连接:仅混凝土填充,拉杆连接,管道连接和腹板焊接螺柱剪切连接。总的来说,在两个测试系列中进行了24个推出试验,以研究在直接剪切力作用下的剪切连接的负载滑移行为和剪切阻力。对两种形式的剪力连接的破坏机理进行了广泛的研究,从而导致了复合作用设计方法的发展。通过腹板开口的混凝土填充元件要承受复杂的三维应力状态,因此很难使用数学模型而不是经验公式来对其进行分析。通过参数研究对仅混凝土填充物的剪力连接进行了有限元分析,以进一步验证已开发的设计方法。在具有实心平板的全尺寸复合浅蜂窝楼板梁上进行了两个弯曲测试。在挠曲测试中研究的剪切连接是:仅混凝土填充的和通过网的拉杆剪切连接。将挠曲测试中的剪力连接的行为和性能与推出测试中的进行了比较。两次挠曲测试的剪力连接度是在塑性分析的基础上,通过塑性理论和测得的材料性能确定的。基于推挤试验和挠曲试验的结果,针对复合浅蜂窝楼板梁,分别在使用极限状态和极限极限状态下,分别建立了挠度检查和抗弯力的两种设计方法。挠度检查设计方法基于复合梁的无裂纹截面特性。本文开发的抗力矩设计方法与BS5950和Eurocode 4(EC4)的设计方法兼容。

著录项

  • 作者

    Huo Bingyu;

  • 作者单位
  • 年度 2012
  • 总页数
  • 原文格式 PDF
  • 正文语种 English
  • 中图分类

相似文献

  • 外文文献
  • 中文文献
  • 专利

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号