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shear capacity of reinforced concrete columns strengthened with CFRP sheet

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2005年第8期6卷 853-858页

作者：谢剑刘雪梅赵彤 Department of Civil Engineering Tianjin University

This paper discusses the results of tests on the shear capacity of reinforced concrete columns strengthened with carbon fiber reinforced plastic (CFRP) sheet. The shear transfer mechanism of the specimens reinforced with CFRP sheet was studied. The factors affecting the shear capacity of reinforced concrete columns strengthened with CFRP sheet were analyzed. Several sug-gestions such as the number of layers, width and tensile strength of the CFRP sheet are proposed for this new strengthening technique. Finally, a simple and practical design method is presented in the paper. The calculated results of the suggested method are shown to be in good agreement with the test results. The suggested design method can be used in evaluating the shear capacity of reinforced concrete columns strengthened with CFRP sheet.

关键词： Reinforced concrete Carbon fiber reinforced plastic (CFRP) Column shear capacity

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A Comprehensive Investigation on shear Performance of Improved Perfobond Connector

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Structural Durability & Health Monitoring 2024年第3期18卷 299-320页

作者： Caiping Huang Zihan Huang Wenfeng You School of Civil Engineering Architecture and EnvironmentHubei University of TechnologyWuhan430068China

This paper presents an easily installed improved perfobond connector (PBL) designed to reduce the shearconcentration of PBL. The improvement of PBL lies in changing the straight penetrating rebar to the Z-typepenetrating rebar. To study the shear performance of improved PBL, two PBL test specimens which containstraight penetrating rebar and six improved PBL test specimens which contain Z-type penetrating rebars weredesigned and fabricated, and push-out tests of these eight test specimens were carried out to investigate andcompare the shear behavior of PBL. Additionally, Finite Element Analysis (FEA) models of the PBL specimenswere established and validated against the test results. Through FEA, the effects of concrete grade, perforatedplate’s aperture, Z-type penetrating rebar’s diameter, Z-type penetrating rebar’s bending angle, and bending lengthon shear behaviors were discussed. The results indicate that (1) Compared with PBL specimens with straightpenetrating rebars, Z-type penetrating rebar can significantly improve the shear resistance and shear stiffnessof the specimens. This enhanced performance can be mainly attributed to the increased adhesion of the transverserebar. (2) By comparing the load-slip curve, the slip of PBL test specimens which contain straight penetratingrebar increases rapidly and the bearing capacity decreases rapidly after concrete craking, while the bearingcapacity of Z-type penetrating rebar specimens decreases first and then increases gradually, showing betterductility. (3) The stress of the PBL shear connector with Z-type penetrating rebar is more uniform than thePBL shear connector with straight penetrating rebar, and the overall deformation is more uniform. (4) The higherthe concrete grade, the higher the shear bearing capacity and the better ductility of the new PBL. Increasing theaperture of the perforated plate or the diameter of the rebar has a very limited effect on the improvement of theshear capacity of PBL. Through the system

关键词： PBL penetrating rebar push-out test load-slip curve shear capacity finite element analysis

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Experimental shear Study on Reinforced High Strength Concrete Beams Made Using Blended Cement

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Journal of Architectural Environment & Structural Engineering Research 2022年第1期5卷 9-16页

作者： Brijesh Singh Vikas Patel P.N.Ojha Amit Trivedi V.V.Arora National Council for Cement and Building Materials BallabgarhHaryanaIndia

With the increased application of High Strength Concrete(HSC)in construction and lack of proper guidelines for structural design in India,behavioral study of high strength concrete is an important aspect of *** on the behavior of HSC reinforced beams with concrete strength more than 60 MPa has been carried out in the past and is still continuing to understand the structural behavior of HSC *** with the many benefits of the high strength concrete,the more brittle behavior is of concern which leads to sudden *** paper presents the behavior of reinforced HSC beams in shear with considering the effects of various factors like shear reinforcement ratio,longitudinal reinforcement ratio,l/d ratio(length to depth ratio),*** numbers Reinforced Concrete Beams of various sizes using concrete mix with three different w/c ratios(0.46,0.26 and 0.21)were cast for shear strength *** beams were tested in simply supported condition over two fixed steel pedestals with load rate of 0.2 mm/minute in displacement ***-point deflection was measured using LVDT.A comparative analysis of theoretical approaches of Euro code,extension of current IS code up to M90 and the experimental data was done to understand the behavior of *** capacities of beams without any factors of safety were used to assess the actual capacities and then was compared with the experimental capacity *** of this study can be used in the design of high strength concrete and will be more reliable in Indian continent as the regional materials and exposure conditions were considered.

关键词： High strength concrete shear capacity Reinforced concrete beams shear behaviour Span to depth ratio

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钢筋混凝土剪力墙塑性铰区受剪承载力分析

钢筋混凝土剪力墙塑性铰区受剪承载力分析

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第六届全国高强与高性能混凝土学术交流会

作者：文保军梁兴文侯莉娜西安建筑科技大土木工程学院西安建筑科技大土木工程学院

＜正＞1．引言钢筋混凝土剪力墙又称抗震墙,是一种有效的抗侧力构件,在高层建筑中得到广泛运用。剪力墙塑性铰区的剪切问题是剪力墙剪切问题中最重要的组成部分,是剪力墙延性设计的重要内容,同时也是尚未很好解决的问题之一。由于其影... 详细信息

＜正＞1．引言钢筋混凝土剪力墙又称抗震墙,是一种有效的抗侧力构件,在高层建筑中得到广泛运用。剪力墙塑性铰区的剪切问题是剪力墙剪切问题中最重要的组成部分,是剪力墙延性设计的重要内容,同时也是尚未很好解决的问题之一。由于其影响因素众多、受力复杂,国内外对此问题研究不够深入,故其受剪机理尚不十分清楚。在我国的混凝土结构设计规范

关键词： shear wall yield hinge regions shear capacity truss and strut actions effectiveness factor

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