斜向配筋耦合梁混凝土芯的非线性行为

IF 1 Q3 MULTIDISCIPLINARY SCIENCES gazi university journal of science Pub Date : 2023-05-14 DOI:10.35378/gujs.1233545
Saeid Foroughi, Bahadır Yüksel
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引用次数: 0

摘要

由于剪力墙的功能原因,门、窗或其他装置等开口被留下,因此会建造带连梁的连动剪力墙。连梁剪力墙的抗震性能取决于连梁的结构性能。在跨度与深度之比小于2的连梁中,发生剪切断裂而不是弯曲断裂。为了满足连梁形成的剪力和弯矩,在连梁中使用了斜束。通常优选斜向增强连梁,因为斜向增强联梁表现出比传统增强连梁更好的性能。对角钢筋束必须由规范中规定的横向钢筋限制。斜向钢筋束中的约束混凝土具有明显不同于素混凝土的应力-应变特性。研究了纵向和横向配筋率对斜向钢筋束内约束混凝土应力-应变特性的影响。利用该程序对54根不同斜筋束约束参数和不同变量的钢筋混凝土连梁进行了分析。研究表明,斜筋束内混凝土的强度和最大应变随约束钢筋配筋率的增加而增加。斜束中横向钢筋直径的增加和横向钢筋间距的减小,增加了混凝土截面的约束作用,提高了延性和强度,并对连梁的抗震性能产生了显著影响。
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Nonlinear Behavior of the Concrete Core of the Diagonally Reinforced Coupling Beams
Coupled shear walls with coupling beams are constructed because of openings such as doors, windows, or other installations that are left behind due to functional reasons in shear walls. The seismic behavior of coupled shear walls with coupling beams depends on the structural performance of the coupling beams. In coupling beams having a ratio of span-to-depth less than two, shear fracture occurs rather than flexural fracture. In order to meet the shear force and the bending moment formed by the coupling beams, diagonal bundles are used in the coupling beams. Diagonal reinforced coupling beams are generally preferred because diagonal reinforced coupling beams exhibit better behavior than conventional reinforced coupling beams. The diagonal reinforcement bundles have to be confined by transverse reinforcements prescribed in the codes. Confined concrete in the diagonal reinforcement bundles has stress-strain characteristics that are distinctly different from those of plain concrete. The effects of longitudinal and transverse reinforcement ratios on the stress-strain behavior of confined concrete inside the diagonal reinforcement bundles were investigated. Fifty-four reinforced concrete coupling beams with different confining parameters of the diagonal reinforcement bundles and different variables were analyzed using the program. It was demonstrated that the strength and the maximum strain of the concrete inside the diagonal reinforcement bundles increase with the reinforcement ratio of the confinement reinforcement. The increase in the diameter of the transverse reinforcement and the decrease in the transverse reinforcement spacing in the diagonal bundles, increase the confining effect in the concrete sections, increasing the ductility and strength, and has a significant effect on the seismic behavior of the coupling beams.
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来源期刊
gazi university journal of science
gazi university journal of science MULTIDISCIPLINARY SCIENCES-
CiteScore
1.60
自引率
11.10%
发文量
87
期刊介绍: The scope of the “Gazi University Journal of Science” comprises such as original research on all aspects of basic science, engineering and technology. Original research results, scientific reviews and short communication notes in various fields of science and technology are considered for publication. The publication language of the journal is English. Manuscripts previously published in another journal are not accepted. Manuscripts with a suitable balance of practice and theory are preferred. A review article is expected to give in-depth information and satisfying evaluation of a specific scientific or technologic subject, supported with an extensive list of sources. Short communication notes prepared by researchers who would like to share the first outcomes of their on-going, original research work are welcome.
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