Download or read book Effect of reinforcement corrosion on seismic performance of concrete bridges written by Caroline Ibbotson and published by . This book was released on 2009 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Corrosion on the Seismic Response of a Single bent Reinforced Concrete Bridge written by Jessica Harvat and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of corrosion on a single-bent, reinforced concrete (RC) bridge subject to seismic loading is the primary focus of this research. This work attempts to determine the effects of decreasing rebar diameter and concrete cover spalling on the strength and stiffness of the RC bridge. The application of these results to the field of historic preservation will also be explored. Through the use of static and dynamic analyses, this research shows that the effects of corrosion only have a slight influence on the seismic fragility of the RC bridge. The loss of three inches of concrete cover from the bridge column is shown to have a greater effect on the strength and stiffness of the bridge than decreasing the rebar diameter by 10%. The deformation capacity and demand both increase for bridges with reduced reinforcing steel and concrete cover; however, the capacity increases to a greater degree than the demand. The seismic fragility of the bridge based on deformation criteria is greatest for the pristine structure, and it decreases as the level of damage increases. Future work should include verifying the hysteretic behavior by accounting for reinforcement slip caused by a loss of bond.
Download or read book Seismic Performance of Corroded Reinforced Concrete Structures Retrofitted with FRP written by Dejian Shen and published by Springer Nature. This book was released on with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Cumulative Seismic Damage and Corrosion on Life cycle Cost of Reinforced Concrete Bridges written by Ramesh Kumar and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridge design should take into account not only safety and functionality, but also the cost effectiveness of investments throughout a bridge life-cycle. This work presents a probabilistic approach to compute the life-cycle cost (LCC) of corroding reinforced concrete (RC) bridges in earthquake prone regions. The approach is developed by combining cumulative seismic damage and damage associated to corrosion due to environmental conditions. Cumulative seismic damage is obtained from a low-cycle fatigue analysis. Chloride-induced corrosion of steel reinforcement is computed based on Fick's second law of diffusion. The proposed methodology accounts for the uncertainties in the ground motion parameters, the distance from source, the seismic demand on the bridge, and the corrosion initiation time. The statistics of the accumulated damage and the cost of repairs throughout the bridge life-cycle are obtained by Monte-Carlo simulation. As an illustration of the proposed approach, the effect of design parameters on the life-cycle cost of an example RC bridge is studied. The results are shown to be valuable in better estimating the condition of existing bridges (i.e., total accumulated damage at any given time) and, therefore, can help schedule inspection and maintenance programs. In addition, by taking into consideration the deterioration process over a bridge life-cycle, it is possible to make an estimate of the optimum design parameters by minimizing, for example, the expected cost throughout the life of the structure.
Download or read book Effects of Confinement and Flares on the Seismic Performance of Reinforced Concrete Bridge Columns written by Nadim I. Wehbe and published by . This book was released on 2001 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Reinforcing Steel Fracture on Seismic Performance of Concrete Structures written by Kuanshi Zhong and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Low-cycle fatigue and fracture of longitudinal reinforcing steel is a critical potential failure mode in concrete structures subjected to earthquake ground motions. Design to resist fracture depends on the reinforcing steel materials, the design details of the reinforced concrete members, and the cyclic deformation and strain demands imposed by the earthquake. Recently, concerns related to reinforcing bar fatigue and fracture have arisen due to two developments. One is the interest by the engineering and construction industry to utilize high-strength reinforcing steel materials in structures designed for regions with high seismic hazard. Since high-strength reinforcing bars tend to be less ductile and more prone to low-cycle fatigue, as compared to conventional Grade 60 bars, their adequacy for use in structures in high seismic regions needs to be confirmed. The second is related to concerns about long duration ground motions, which can increase the cyclic loading demands on steel reinforcement. Since current design methods do not explicitly consider the influences of ground motion duration, questions have been raised as to whether current seismic design requirements are adequate for structure in regions that may be affected by large magnitude earthquakes or geologic basin effects, which can lead to ground motion duration that are longer than considered in conventional designs. In the prevailing structural design and assessment methods, fatigue and fracture are only implicitly considered by checks of peak deformation measures (e.g., peak strain demand) or other proxy measures (e.g., cumulative plastic demand), which are not sufficient to resolve behavioral effects associated with material cyclic toughness and duration effects under random cyclic loading. This study (1) develops a reliable analytical framework and supporting computational tools for simulating fatigue and fracture in steel reinforcement, considering the steel material properties, reinforcing bar details in concrete structures, and random ground motion loading; (2) applies these methods to evaluate seismic design requirements for high-strength reinforcing bars, specifically Grade 80 and Grade 100 bars; (3) develops an analytical framework and algorithms for using nonlinear dynamic analysis results to systematically evaluate earthquake duration and ground motion spectral shape effects on structures; and (4) applies these methods to incorporate earthquake duration effects in the design of reinforced concrete bridge piers.
Download or read book Effects of Bond Deterioration Due to Corrosion on Seismic Performance of Reinforced Concrete Structures written by Anton Kivell and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Confinement and Flares on the Seismic Performance of Reinforced Concrete Bridge Columns written by Nadim I. Wehbe and published by . This book was released on 1997 with total page 958 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Confinement and Flares on the Seismic Performance of Reinforced Concrete Bridge Columns written by Nadim I. Wehbe and published by . This book was released on 1997 with total page 958 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Bibliography on the Corrosion and Protection of Steel in Concrete written by E. Escalante and published by . This book was released on 1979 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental and Computational Evaluation of Reinforced Concrete Bridge Beam column Connections for Seismic Performance written by Clay Joshua Naito and published by . This book was released on 2001 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Reinforcement Corrosion on the Structural Performance of Reinforced Concrete Beams written by Gavin De Vos Theron and published by . This book was released on 1994* with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismic Performance of Corroded Reinforced Concrete Structures Retrofitted with FRP written by Dejian Shen and published by Springer. This book was released on 2024-02-26 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph is written based on the author's research on seismic assessment and retrofitting of corrosion-damaged reinforced concrete structures during the recent two decades. It points out that reinforcement corrosion is one of the main reasons that contribute to the deterioration of the seismic performances and durability of reinforced concrete structures. It illustrates that the mechanism of reinforcement corrosion should be investigated to propose a method for evaluating the seismic performance of corroded components and structures. It calls for a comprehensive investigation on the bond performance between corroded reinforcing bars and concrete, as well as the degradation law of seismic performance of corroded beams, columns, beam column joints, and shear walls from the perspectives of materials, components, and structures. With the promotion and application of composite materials, fiber reinforced polymer (FRP) has been proposed as an ideal material for retrofitting reinforced concrete structures. By emphasizing the mechanism of reinforcement corrosion and the integrated evaluation of materials, components, and structures, this monograph offers an idea of using FRP to retrofit the seismic performance of corroded reinforced concrete structures. It is designed as a reference work for professionals or practitioners and a textbook for undergraduates or postgraduates. This book provides valuable knowledge and useful methods that can be considered in the field of seismic assessment and retrofitting of corrosion-damaged reinforced concrete structures with other FRPs.
Download or read book Effect of varying axial loads including a constant tension on seismic performance of reinforced concrete bridge columns written by Jun'ichi Sakai and published by . This book was released on 2000 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Flexural Strength Variations on the Seismic Performance of Reinforced Concrete Multiple Column Bridge Bents written by Mark Lee Marsh and published by . This book was released on 1991 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reinforced Concrete Structures written by Robert Park and published by John Wiley & Sons. This book was released on 1991-01-16 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sets out basic theory for the behavior of reinforced concrete structural elements and structures in considerable depth. Emphasizes behavior at the ultimate load, and, in particular, aspects of the seismic design of reinforced concrete structures. Based on American practice, but also examines European practice.
Download or read book Seismic Fragility Estimates and Sensitivity Analyses for Corroding Reinforced Concrete Bridges written by Do-Eun Choe and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to develop methodologies to estimate and predict the fragility of deteriorating reinforced concrete (RC) bridges, and to identify the effect of design and construction parameters on the reliability of RC bridges over time to assist in the design and construction process. To accurately estimate the fragility of deteriorating bridge, probabilistic capacity and demand models are developed. In addition, to simplify the calculation cost maintaining accuracy, fragility increment functions are developed. The proposed fragilities account for model uncertainties in the structural capacity, demand models, corrosion models. Furthermore, proper account is made of the uncertainties in the environmental conditions, material properties, and structural geometry. To identify the effect of design and construction parameters on the reliability of RC bridges, a sensitivity and importance analysis is conducted. Sensitivity analysis for an example bridge subject to corrosion is carried out to identify which parameters have the largest impact on the reliability over time. This dissertation considers different combinations of chloride exposure condition, environmental oxygen availability, water-to-cement ratios, and curing conditions, which affect the reliability of bridges over time. The developed models are applicable to both existing and new RC bridges and may be employed for the prediction of service-life and life-cycle cost analysis of RC bridges.
