Model for Anchored Reinforcing Bars Under Seismic Excitations PDF Download

Author: Giorgio Monti
Publisher:
ISBN:
Category : Reinforced concrete construction
Languages : en
Pages : 104

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Author: Vincenzo Ciampi
Publisher:
ISBN:
Category : Anchorage (Structural engineering)
Languages : en
Pages : 128

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Presents an analytical model for predicting the behaviour of single deformed reinforcing bars embedded in confined concrete and subjected to generalized excitations in the range of low cycle fatigue.

Author: Filip C. Filippou
Publisher:
ISBN:
Category : Concrete construction
Languages : en
Pages : 372

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 16

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A new finite element model for reinforced concrete beam-column joints is proposed. The model considers the effects of bond-slip and shear deformations in the joint panel region. The problems associated with modeling bond-slip of anchored reinforcing bars are discussed. The proposed bond-slip model is examined at the element level by comparing its predictions with other analytical and experimental results. The ability of the model to simulate bond deterioration and eventual pullout of anchored reinforcing bars under severe cyclic excitation is demonstrated. This model is incorporated into the global beam-column joint element. Further comparisons are made between the predictions of the proposed beam-column joint model and other analytical and experimental results under reversed cyclic loading to show the validity of the model to describe the bond-slip behavior of the joints.

Author: Zhiyu Zong
Publisher:
ISBN: 9781124319148
Category :
Languages : en
Pages :

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For reinforced concrete (RC) structures subjected to seismic loads, buckling of longitudinal reinforcing bar is a significant damage stage. The objective of this research is to identify the critical parameters that control the buckling of reinforcing bars in typical circular and rectangular RC columns subjected to cyclic lateral loads. A series of nonlinear finite element simulations of laterally loaded RC columns are carried out to simulate reinforcing bar buckling behavior. Next, to achieve computational efficiency and enable a large range of simulations for a parametric study, a simplified "bar-with-springs" model is developed wherein the longitudinal reinforcing bar in a column is isolated and simulated as a flexural member. The combined restraining mechanism affected by transverse reinforcing and column size is represented by springs at the location of each transverse bar. The simplified model is validated through comparison of average stress-strain curves of "bar-with-springs" models with corresponding "full column" models. After the validation of proposed models, which are capable of providing with "average stress-strain" response of longitudinal bars, an equivalent material model is developed for reinforcing steel in RC columns that implicitly incorporates the degrading effects of bar buckling. A comprehensive parametric study is performed to identify the effects of several important column parameters on the buckling behavior of the longitudinal reinforcement in RC columns. Features of average stress-strain curves of compressively loaded reinforcing bars are summarized. Constitutive relations as functions of critical column parameters are developed for the direct use in nonlinear structural analysis of RC structures. Comparison of the numerically simulated global response of experimentally tested RC columns confirm the value and significance of the proposed equivalent material models as a simple and effective way to include bar buckling effects in finite element analysis of RC structures.

Author: P. Benson Shing
Publisher: ASCE Publications
ISBN: 9780784474969
Category : Technology & Engineering
Languages : en
Pages : 636

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Proceedings of the U.S.?Japan Seminar on Post-Peak Behavior of Reinforced Concrete Structures Subjected to Seismic Loads: Recent Advances and Challenges on Analysis and Design, held in Tokyo and Lake Yamanaka, Japan, October 25-29, 1999. Sponsored by the National Science Foundation, U.S.A.; Japan Society for the Promotion of Science; Japan Concrete Institute. This collection presents the latest ideas and findings on the inelastic behavior of reinforced concrete (RC) structures from the analysis and design standpoints. These papers discuss state-of-the-art concrete material models and analysis methods that can be used to simulate and understand the inelastic behavior of RC structures, as well as design issues that can improve the seismic performance of these structures. Topics include modeling of concrete behavior; modeling of RC structures (finite element approach and macro-element approach); and experimental studies, analysis, and design issues.

Author:
Publisher:
ISBN:
Category : Accelerograms
Languages : en
Pages : 264

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Author: Vincenzo Ciampi
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: C. Mahrenholtz
Publisher:
ISBN:
Category : Anchor
Languages : en
Pages : 12

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Tests on anchors and reinforcing bars in cracked concrete members with cyclically opening and closing cracks are carried out to study their performance under variable live loads and seismic loads. Cyclic crack tests are the most demanding and often decisive test series conducted for the qualification of anchors, which were cast-in or post-installed in concrete. Research in the field of seismic engineering also requires cyclic crack tests on anchors as well as on reinforcing bars. Testing of anchors and reinforcing bars in cyclic cracks makes special considerations with respect to the test specimen, test setup, and test procedure necessary. This article provides guidance, discusses how to carry out the technically challenging cyclic crack tests, and presents an example.

Author: Rolf Eligehausen
Publisher:
ISBN:
Category : Buildings
Languages : en
Pages : 194

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