钢筋混凝土节点在弯曲荷载作用下的结构性能

Q3 Engineering

Open Civil Engineering Journal Pub Date : 2023-03-01 DOI:10.28991/cej-2023-09-03-015

Mohammed M. Handhal, A. W. Abdulghani, Montaqa M. Al-Haydary

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引用次数: 0

摘要

本文对钢筋混凝土梁柱节点的受力性能进行了研究。研究了不同型钢对钢筋混凝土节点的加固作用。采用有限元法对钢筋截面的梁柱节点进行了数值模拟，并进行了理论分析。参数化研究的实施包括在许多配置中用钢截面加固混凝土梁。形状和长度是本研究中变量最多的，除了混凝土抗压强度变量外，还使用了许多形状，如工字截面、箱形截面和板形。最近的研究表明，该方法可以提高关节的抗载荷效率，同时提供许多额外的功能，如更高的延展性、刚度和能量吸收。结果表明，钢筋截面加固对节点抗弯强度有一定的提高作用，但受混凝土强度限制，提高幅度有限。极限强度提高了49%，这被认为是一个很好的节理效率指标。使用少量的抗压强度导致增强由于混凝土的弱点而受到限制。通过增加钢截面来加强梁的受弯侧，需要更强的混凝土为钢截面抵抗更大的弯曲荷载提供更大的贡献。混凝土抗压强度的提高使改善达到峰值。工字型钢和箱形型钢的加固结果表明，由于工字型钢的存在，加固效果大于箱形型钢。Doi: 10.28991/CEJ-2023-09-03-015全文:PDF

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Structural Behavior of Steel Reinforced Concrete Joint Under Flexural Loads

This research investigates the behavior of RC beam column joints reinforced with steel sections. The study deals with the strengthening of RC joints by different steel sections. The investigation included a theoretical analysis through a performing of simulation of beam-column joints laced with steel sections by using FEA. Implementation of the parametric study included reinforcing the concrete beam with steel sections in many configurations. Shapes and length were the most variables in this study, and many shapes were used, such as I-section, box section, and plates, beside the concrete compressive strength variable. The most recent study revealed the possibility of the method to enhance the efficiency of the joint in resisting the loads while the offering many additional features such as higher ductility, stiffness, and energy absorption. The results showed that strengthening by the steel section enhanced the flexural strength of the joint, but these enhancements were to a certain limit due to the concrete strength limitation. The ultimate strength enhancement was 49%, which is considered a good index for the joint efficiency. The use of compressive strength in small amounts led to the enhancements being limited due to the weakness of the concrete. Strengthening the flexural side of the beam by adding a steel section requires stronger concrete to provide more contribution for the steel section to resist more flexural loads. The increase in the compressive strength of the concrete made the improvements reach their peaks. Strengthening by I-shaped and box steel sections showed that the enhancement due to the existence of the I section was greater than that of the box one. Doi: 10.28991/CEJ-2023-09-03-015 Full Text: PDF

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来源期刊

Open Civil Engineering Journal Engineering-Civil and Structural Engineering

CiteScore

1.90

自引率

0.00%

发文量

期刊介绍： The Open Civil Engineering Journal is an Open Access online journal which publishes research, reviews/mini-reviews, letter articles and guest edited single topic issues in all areas of civil engineering. The Open Civil Engineering Journal, a peer-reviewed journal, is an important and reliable source of current information on developments in civil engineering. The topics covered in the journal include (but not limited to) concrete structures, construction materials, structural mechanics, soil mechanics, foundation engineering, offshore geotechnics, water resources, hydraulics, horology, coastal engineering, river engineering, ocean modeling, fluid-solid-structure interactions, offshore engineering, marine structures, constructional management and other civil engineering relevant areas.