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首页> 外文期刊>Advances in Concrete Construction >Behavior of tension lap spliced sustainable concrete flexural members
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Behavior of tension lap spliced sustainable concrete flexural members

机译：搭接搭接可持续混凝土受弯构件的受力性能

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摘要

The use of spliced reinforcing bars in sustainable concrete members to manage inadequate bars length is a common practical issue which is may be due to some limitations. The lap splicing means two bars overlapped in parallel with specified length called the splice length in order to provide the required bond between the two bars. The bond between sustainable concrete and spliced steel bars is another important issue. The normal strength sustainable concrete specimens of sizes 1700 x150 x 150 mm with tension reinforcement lap spliced were selected according to testing device length limitations. These members were designed to fail in flexure in order to investigate the lap spliced tension bars effect. The selected lap spliced tension bars were of 10 mm size with smooth and deformed surfaces in order to investigate the surface nature accompanied with the splice nature. The sustainable concrete mechanical properties and mix workability were also studied. This study reveals that the effect of number of spliced bars on the response of beams reinforced with smooth bars is found to be more obvious than deformed one. Finite element modeling in three dimensions was carried out for the tested beams using ABAQUS software. A parametric study is carried out using finite elements on considering the following parameters, concrete compressive strength, load type and opening in cross section (hollow section) for weight reduction purposes.The laboratory and numerical results show good agreements in terms of ultimate load and deflection with an average difference of 10% and 15% in ultimate load and deflection respectively.
机译：在可持续的混凝土构件中使用拼接钢筋来控制钢筋长度不足是一个常见的实际问题，可能是由于某些限制。搭接是指以指定的长度（称为拼接长度）平行重叠的两根钢筋，以便在两根钢筋之间提供所需的粘结。可持续混凝土与拼接钢筋之间的粘合是另一个重要问题。根据测试设备的长度限制，选择尺寸为1700 x150 x 150 mm的普通强度可持续混凝土标本，并搭接抗拉钢筋搭接。这些构件被设计为不能弯曲，以便研究搭接的拉紧杆效应。选定的搭接拼接拉力棒的尺寸为10 mm，表面光滑且变形，以便研究伴随拼接特性的表面特性。还研究了混凝土的可持续力学性能和可加工性。这项研究表明，拼接钢筋的数量对用光滑钢筋加固的梁的响应的影响比变形钢筋更明显。使用ABAQUS软件对测试梁进行了三维三维有限元建模。为了减少重量，使用有限元进行了参数研究，考虑了以下参数，混凝土抗压强度，荷载类型和横截面（空心截面）的开度，实验室和数值结果在极限荷载和挠度方面显示出良好的一致性极限载荷和挠度的平均差异分别为10％和15％。

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