1982 . The proposed model is used to confirm and investigate distinct failure modes observed in experimental investigations. Further, it is shown that the consideration of expansion and confinement effects generally results in a significant improvement in the accuracy of the analysis. However, a need to provide simple, yet adaptive modeling guidelines for engineers and researchers using these tools exists, specifically for, This paper deals with the elasto-plastic behaviour of reinforced concrete slit shear walls, a new type of earthquake-resistant wall structure. Editor-in-Chief: G. Ian Alsop. Confirm. The accuracy of the formulations are examined through finite element analyses of a number of shear panels and shear walls previously tested. CiteScore: 5.7 ℹ CiteScore: 2019: 5.7 CiteScore measures the average citations received per peer-reviewed document published in this title. Furthermore, not all these information are easily accessible for researchers and engineers. "Experiments on Long-Span Cold-Formed Steel Single C-Section Portal Frames" August ; 1963 . Agreement onAcademic agreement. Search. Civil Engineering Journal (C.E.J) is a multidisciplinary, an open-access, internationally double-blind peer -reviewed journal concerned with all aspects of civil engineering. The experimental program described in this study involved 97 tensile tests of six adhesive products on the following types of 5/8-in. Equilibrium, compatibility, and stress-strain relationships are formulated in terms of average stresses and average strains. 2019 Best Journal Paper in Materials and Structural Response 3) differs from the other formulas offered in the literature for similar purpose in that provides more relative curvature in the diagram for concretes of lower strengths. Smith, G. M., and Young, L. E. (1955). " Constitutive formulations are presented for concrete subjected to reversed cyclic loading consistent with a compression field approach. 2) combined with Eq. The discussion is limited to shallow beams, where shear deformations are neglected. However, little attention has been paid to torsional strengthening in terms of both experimental and numerical research. Available Issues Current Issue All Issues. The numerical analysis also includes simulations on pre-cracked beams. The proposed theory is shown to yield improved simulations of response in specific situations where the previous formulation was found to produce inaccuracies. 0.672 Publishes international research on structural engineering, including building materials, sustainability of structures, design, construction and maintenance. In the context of capacity design philosophy, where a desired failure mode exhibiting adequate levels of energy absorption capacity is envisaged, control must be exercised on the member behaviour to safeguard the achievement of the target overall response. J. Struct. Delamination occurs when the bond strength is reached locally. The modeling herein utilizes low-powered rectangular membrane elements, and material properties are smeared within the elements. Wechat; Email; Sign Up; Use Wechat scan code to follow the official account directly sign in. Jose Dario Aristizabal-Ochoa Search; Browse; Journal issue. Consideration is also given to local stress conditions at crack locations. The paper explore procedure to determine the amount of incident passive solar energy in a building using ventilation and day lighting analysis using Computer-Aided simulation and by manual calculation as well. A unique library of up to 13 parameters (mechanical properties and geometric characteristics) affecting the strength, stiffness and drift ratio of the shear walls are gathered including their sensitivity analysis. A Shape Memory Alloy (SMA) tension brace was developed as a retrofit device to improve the seismic response of deficient reinforced concrete squat shear walls. The braces consisted of SMA and reinforcing steel links, respectively, placed at the centre of the bracing system and connected to rigid hollow structural steel members. A non-linear finite element (FE) analysis is proposed in order to complete the experimental analysis of the flexural behaviour of the beams. It significantly influences the strength, ductility and load-deformation response of a concrete clement. We are now submitting the paper after its second revision. (16-mm)-diameter threaded anchors: fully bonded single anchors; partially bonded single anchors [debonded over their upper 2 in. It is concluded that, with appropriate design, the conversion of a solid shear wall into a slit shear wall can substantially increase the ductility of the wall structure, but there will be a slight reduction in lateral strength. The model proved to be able to simulate the beams' behaviour, predicting the failure modes, the failure loads and the reinforcement strain distributions relatively well. Critical to the success of the analyses was the development of constitutive bond-slip models for the link elements to simulate slotted steel connections, which function as a delay mechanism, and for anchorage of FRP sheets to concrete foundations. Emphasis is given to identifying dowel mechanisms under cyclic actions. The debonding phenomenon is the subject of the experimental program described herein, which involved the strengthening of shear-critical beams using carbon FRP (CFRP) strips. © 2008-2021 ResearchGate GmbH. しかしながら, 塑性ヒンジ長は, 断面高さ及びせん断支間比の他, 軸方向鉄筋径や帯鉄筋間隔等によって変化することが指摘されており, 特に軸方向鉄筋が降伏した後の挙動については十分解明されていないのが現状である. “Utility and Information Analysis for Optimum Inspection of Fatigue-Sensitive Structures”, 2019 Outstanding Reviewers Testing and retesting of the SMA braces illustrated their potential to act as resettable braces. Based on the non-linear load-deflection curves of the connecting beams obtained using the softened, The Finite Element Method (FEM) was employed to demonstrate that accurate simulations of seismically repaired and retrofitted reinforced concrete shear walls can be achieved provided a good analysis program with comprehensive models for material and structural behaviour is used. 2020 Society Award Papers Ahmed Elkady Seckin, M. (1981). " Deformed reinforcing steel bars that experience significant residual strains during the inelastic range of loading were incorporated into the steel links. Struct., 79(6), 595–604. Publisher country is India. The journal is one of the flagship journals of the Society. Particularly important is the characterization of the interface (FRP-concrete) mechanical properties, for which a simple test is proposed. Results from different experiments are sometimes in conflict with each other, or have minimum correlation. The modeling used simple rectangular and triangular membrane elements for concrete with smeared internal reinforcement, truss bar elements for external steel and FRP retrofitting materials, and bond-link elements for the bonding interface between steel and FRP to concrete. of Toronto, Toronto. Wall SW34: (a) test specimen (Elnashai and Pinho 1998); (b) numerical model; (c) modeling of delay mechanism; (d) proposed bond stress-slip model for delay mechanismReferences Aprile, A., Spacone, E., and Limkatanyu, S. (2001). " The lightly reinforced concrete walls were also repaired using only vertical strips and retested. To read the full-text of this research, you can request a copy directly from the author. Issue 4 2020. Editor in Chief Dr. Ing. The formulations presented presume the use of a secant-stiffness-based solution procedure, involving the concept of material prestrains. Kara D. Peterman It is found that in certain cases, the dowel action can have significant effects on the shear strength and ductility of reinforced concrete beams and that the analytical results generally agree better with the experimental values when the dowel action is taken into account. Journal of Structural Engineering (ASCE) Language(s): English ISSN: 0044-8001: Issues. accomplish you tolerate that you require to get those all needs past having significantly cash? The number of pages and the size of your manuscript must not exceed 14 pages and 3 MB, respectively. The so-called compression softening effect responsible is thought to be related to the degree of transverse cracking and straining present. Yan Liu, A.M.ASCE; and Dan M. Frangopol, Dist.M.ASCE, (2018) Author Name(s) Type. 5a through 5d, 8a through 8d, and 9. Volume 147 Volume 146 Volume 145 Volume 144 Volume 143 Volume 142 Volume 141 Volume 140 Volume 139 Volume 138 Volume 137 Volume 136 Volume 135 Volume 134 … Tak-Ming Chan A critical issue of this strengthening technique is that, when the plate debonds, the load capacity suddenly drops and the failure mode is typically brittle. The modelling utilized simple rectangular membrane elements for the concrete, truss bar elements for the steel and FRP retrofitting materials, and bond-link elements for the bonding interface between steel or FRP to concrete. Based on 2020, SJR is 0.138. Special Collection on “Twenty Years of Advances in Disproportionate Collapse Research and Best Practices Since 9/11/2001”, 2019 Best Journal Paper in Analysis & Computation of London, London. Based on new data, previously derived analytical models are updated. These data are compared against the predictions of previously developed crack slip models, as well as against an alternative constitutive model proposed herein. J. The focus herein is to provide quick, simple, but reliable modelling procedures for repair and retrofitting strategies such as concrete replacement, addition of diagonal reinforcing bars, bolting of external steel plates, and bonding of external steel plates and fibre reinforced polymer sheets, thus illustrating versatility in the modelling. The analyses satisfactorily simulated seismic behavior, including lateral load capacity, displacement capacity, energy dissipation, hysteretic response, slip between the retrofitting material and the concrete structure, and failure mode. Further advancements have made the analysis of arbitrary loading conditions, including reverse cyclic loading or earthquake-type loading, feasible. Elnashai and Pinho 1998); (b) numerical model; (c) modeling of delay mechanism; (d) proposed bond stress-slip model for delay mechanismReferences Role of bond in RC beams strengthened with steel and FRP plates. It is shown that the inclusion of concrete lateral expansion can, in some cases, significantly alter the computed response of an element or structure. View editorial board. on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures, American Concrete Institute, Farmington Hills, MI, 1305–1324. 22 Full PDFs related to this paper. International Journal of Advanced Structural Engineering. This paper describes the formulation of the theory at the fundamental level. SP-230: 7th Int. Wei-Liang Jin ISSN online 1758-7336 ISSN print 1758-7328 4 issues per year . The concrete walls had minimum reinforce-ment. Four concrete block masonry and two reinforced concrete walls were designed to simulate low-rise nonductile walls built decades ago, before the enactment of earthquake-resistant design provisions. A method is presented by which concrete lateral expansion can be incorporated into a nonlinear finite element algorithm. The implementation of link and contact elements, along with linear elastic and elastic-plastic bond laws, is shown to produce accurate predictions of member response. Start at call number: 620.6 .A512P ST V.108:9-12 1982. 2008) published by the National Institute of Standards and Technology (NIST). (1992). " truss model, the elasto-plastic behaviour of the slit shear wall structure as a whole was evaluated using a non-linear finite-element method. Category: Mechanical and Materials Engineering. The analytical results are then reduced into simple model equations. Variation of assumptions, materials, test procedures, and test objectives make it difficult to choose the right model for validation of the numerical models. New sets of equilibrium, compatibility, and constitutive relations are formulated accordingly, and alternative crack slip models are discussed. Therefore, local repair and retrofitting methods that result in unquantifiable effects on seismic response characteristics should be re-assessed. These revisions were made and several additional comments were received. At the same time, a number of diverse analytical models have been proposed by various researchers aimed at modeling this behavior, In this paper, a review is made of the experimental data available, of the various models proposed, and of the accuracy of the models in correlating to the test data. Indeterminate truss models are proposed for the analysis of low-rise walls retrofitted using a special system of vertical and diagonal steel strips. One of the oldest and most respected peer-reviewed periodicals in the field of structural engineering, the Journal reports on fundamental knowledge that advances the state-of-the-art and state-of-the-practice in structural engineering. This allows following more accurately the crack propagation and the failure mechanism of the flexural member. Browse. The Journal of Structural Engineeringis the principal professional peer-reviewedjournal of the American Society of Civil Engineers, the oldest professional civil engineering society in the United States.
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