Email Address is required Invalid Email Address
In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Learn More
Become an ACI Member
Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
Staff Directory
ACI World Headquarters 38800 Country Club Dr. Farmington Hills, MI 48331-3439 USA Phone: 1.248.848.3800 Fax: 1.248.848.3701
ACI Middle East Regional Office Second Floor, Office #207 The Offices 2 Building, One Central Dubai World Trade Center Complex Dubai, UAE Phone: +971.4.516.3208 & 3209
ACI Resource Center Southern California Midwest Mid Atlantic
Feedback via Email Phone: 1.248.848.3800
ACI Global Home Middle East Region Portal Western Europe Region Portal
Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 73 Abstracts search results
Document:
SP275-57
Date:
March 1, 2011
Author(s):
Z. Y. Sun, G. Wu, Z. S. Wu, and J. B. Hao
Publication:
Symposium Papers
Volume:
275
Abstract:
A parametric analysis and experimental study of concrete columns reinforced by steel-BFRP (basalt fiber reinforced polymer) composite bar (SBFCB) were conducted. The relationship between post-yield stiffness of SBFCB and SBFCB reinforced concrete columns was investigated. The influences of reinforcement ratio, axial compression ratio, and post-yield stiffness ratio were explored. The results show that (1) under the same reinforcement ratio, the post-yield stiffness of SBFCB columns increases with the post-yield stiffness ratio of SBFCB; (2) the higher the BFRP content of SBFCB, the better deformation capacity of SBFCB column can be achieved due to the smaller curvature demand of column base; (3) a higher SBFCB post-yield stiffness ratio can delay or prevent the collapse of concrete column caused by P- effect; (4) the residual displacements of SBFCB columns are much smaller than those of ordinary RC columns, that is, the SBFCB column has a more better post-earthquake repairability.
DOI:
10.14359/51682467
SP275-37
K. Gordon and L. Cheng
This paper presents the results evaluating the empirical fatigue-life relation-ships currently available for predicting the fatigue life of reinforced concrete beams strengthened with fiber reinforced polymers. Derived from individual studies, each relationship is used to generate predictions for sets of test data that are reported in the open literature. The predictions are then analyzed for accuracy and investigated for factors that may lead to improved fatigue-life models. Analyses of data using currently available models indicate that much improvement is needed. The improvements should not only address individual factors that can affect fatigue life, but should also result in accurate predictions across multiple sets of data.
10.14359/51682447
SP275-60
Clayton A. Burningham, Chris P. Pantelides, and Lawrence D. Reaveley
This paper presents research that uses novel clamp anchors and a simple mechanical stressing device for post-tensioning carbon FRP (CFRP) composite rods. The CFRP system was used in the repair of prestressed and normal reinforced concrete beams controlled by flexural and shear failure, respectively. The scaled specimens were designed to simulate concrete bridge girders with two different types of field-observed damage—end cracking and damage to internal steel prestressing tendons caused from vehicle collision. The CFRP repair system increased the ultimate strength and proved to be a practical and feasible method of repairing concrete girders with reduced shear or flexural capacity.
10.14359/51682470
SP275-26
Mohamed F.M. Fahmy, Z.S. Wu, and G. Wu
Existence of positive post-yield stiffness and mitigation of both residual deformation and damage level are critical indices in the performance of reinforced concrete (RC) bridge frame columns to assure the quick recovery of bridge original functions after a massive earthquake. In this study, because bond between longitudinal reinforcement and concrete is a key factor controlling the performance of RC structures, effects of bond parameters on the required post-earthquake recoverability of RC bridge columns reinforced with innovative composite rebars: steel fiber composite bars (SFCBs), are studied. Results of experimentally tested columns reinforced with different products of SFCBs are firstly presented. Afterward, a computer program is employed to investigate the effect of bond parameters on the recoverability indices (post-yield stiffness, residual deformations, and damage level) of columns reinforced with steel basalt-fiber composite bars (SBFCBs). The study showed that weaked bond between SFCBs and the surrounding concrete at plastic hinge zone would play an important role in the recoverability of structures reinforced with SBFCBs, where the achieved post-yield stiffness, residual deformations, and damage level could be controlled.
10.14359/51682436
SP275-38
Fadi Oudah, and Raafat El-Hacha
A flexural fatigue strength prediction model of prestressed Near Surface Mounted (NSM) Carbon Fiber Reinforced Polymer (CFRP) strengthened beams has been developed in this paper. The prediction model is based on the degradation of the concrete compressive block and the degradation of the bond between the tension reinforcements, prestressed CFRP and steel reinforcements, and the surrounding concrete during the fatigue life. A parametric study using the developed model was conducted on reinforced concrete (RC) beam strengthened with prestressed NSM-CFRP reinforcement. It was concluded that the degradation of the concrete stress-strain relationship has a minor effect on the ultimate capacity of the beam as compared with the effect of bond breakdown.
10.14359/51682448
Results Per Page 5 10 15 20 25 50 100