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Strength Evaluation Of Deteriorated Reinforced Concrete Bridge Columns
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Book Synopsis Strength Evaluation of Deteriorated Reinforced Concrete Bridge Columns by : Mucip Tapan
Download or read book Strength Evaluation of Deteriorated Reinforced Concrete Bridge Columns written by Mucip Tapan and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Determining Strength Capacity of Deteriorated Reinforced Concrete Bridge Substructures by : Timothy Kenneth Saad
Download or read book Determining Strength Capacity of Deteriorated Reinforced Concrete Bridge Substructures written by Timothy Kenneth Saad and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Fiberglass Wrapped Concrete Bridge Columns by : Dante Fratta
Download or read book Evaluation of Fiberglass Wrapped Concrete Bridge Columns written by Dante Fratta and published by . This book was released on 2008 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main purpose of this project was to assess the effectiveness of fiberglass wrappings in reducing the corrosion degradation rate of concrete bridge columns. To evaluate the effectiveness of the technique, the research team used both nondestructive and destructive test methods. The results of the study show that the wrappings, while protecting the columns from further ingress of chloride ions, do not help deter corrosion activity when it is already present. Recommendations for the future use of fiber wraps, complemented with other remediation techniques and maintenance practices, are provided.
Book Synopsis Performance Evaluation of Reinforced Concrete Bridge Columns Through Experimental Blast Testing by : A. E. Echevarria
Download or read book Performance Evaluation of Reinforced Concrete Bridge Columns Through Experimental Blast Testing written by A. E. Echevarria and published by . This book was released on 2014 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Shear Strength of Reinforced Concrete Columns by : M. J. N. Priestley
Download or read book Seismic Shear Strength of Reinforced Concrete Columns written by M. J. N. Priestley and published by . This book was released on 1993 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Steel-Reinforced Concrete Structures by : Mohamed El-Reedy
Download or read book Steel-Reinforced Concrete Structures written by Mohamed El-Reedy and published by CRC Press. This book was released on 2007-10-22 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Practical Guide to Maintenance Carrying a billion-dollar price tag, corrosion of reinforced concrete is the enemy of every country's investment in real estate. The widespread and long-term use of reinforced concrete makes its correct and proper examination, maintenance, and repair paramount. Steel-Reinforced Concrete Structur
Book Synopsis Life Cycle Analysis and Assessment in Civil Engineering: Towards an Integrated Vision by : Robby Caspeele
Download or read book Life Cycle Analysis and Assessment in Civil Engineering: Towards an Integrated Vision written by Robby Caspeele and published by CRC Press. This book was released on 2018-10-31 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the papers presented at IALCCE2018, the Sixth International Symposium on Life-Cycle Civil Engineering (IALCCE2018), held in Ghent, Belgium, October 28-31, 2018. It consists of a book of extended abstracts and a USB device with full papers including the Fazlur R. Khan lecture, 8 keynote lectures, and 390 technical papers from all over the world. Contributions relate to design, inspection, assessment, maintenance or optimization in the framework of life-cycle analysis of civil engineering structures and infrastructure systems. Life-cycle aspects that are developed and discussed range from structural safety and durability to sustainability, serviceability, robustness and resilience. Applications relate to buildings, bridges and viaducts, highways and runways, tunnels and underground structures, off-shore and marine structures, dams and hydraulic structures, prefabricated design, infrastructure systems, etc. During the IALCCE2018 conference a particular focus is put on the cross-fertilization between different sub-areas of expertise and the development of an overall vision for life-cycle analysis in civil engineering. The aim of the editors is to provide a valuable source of cutting edge information for anyone interested in life-cycle analysis and assessment in civil engineering, including researchers, practising engineers, consultants, contractors, decision makers and representatives from local authorities.
Book Synopsis Shaking Table Evaluation of Reinforced Concrete Bridge Columns Repaired Using Fiber Reinforced Polymer Jackets by : Pardeep Kumar
Download or read book Shaking Table Evaluation of Reinforced Concrete Bridge Columns Repaired Using Fiber Reinforced Polymer Jackets written by Pardeep Kumar and published by . This book was released on 2014 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: After an earthquake event it is the responsibility of the engineers to decide if the bridge structure is safe for the traffic flow, requires repair or needs to be replaced completely depending on the damage level. Effective, economical and timely repair of Reinforced Concrete (RC) bridges after a seismic event is crucial to avoid traffic congestion and lengthy detours. Fiber Reinforced Polymer (FRP) composite laminates are one of few options with several advantages. Use of FRP jackets in structural engineering is gaining interest in applications such as strengthening weak structural elements, improving the existing structure capacity to resist increased loads due to change in use of structure and retrofitting structural elements for seismic upgrades. The study presents shaking table experimental investigation to evaluate the use of FRP for repairing RC bridge columns with circular cross-sections. Two 1/4-scale RC columns were tested in as-built configuration. Both tests had identical geometry and reinforcement details except for the spacing of the transverse reinforcing bars. One column had closely spaced hoops satisfying code requirements and the other had larger spacing, representing a shear-critical column. The test specimens were subjected to a series of horizontal and vertical excitations on a shaking table and experienced moderate to high damage. The damaged columns were subsequently repaired with unidirectional FRP composite laminates and subjected to the same set of earthquake excitations. The obtained experimental data showed that the repaired columns achieved higher strength and ductility with lower residual displacements compared to the as-built ones contributing to the resiliency of the bridge system. A three-dimensional (3D) Finite Element (FE) model was developed and calibrated using the experimental test results. A bilinear confined concrete model was adopted to model the constitutive relationship of the FRP confined concrete without explicitly modeling the FRP composite jacket. Due to variability of the material properties, several calibration parameters were studied to develop a reliable FE model. The results of the dynamic FE analysis showed great potential for 3D modeling of the repaired test specimens. From this study, it is concluded that the used FRP composite laminates represent a viable solution for the effective and rapid repair of damaged RC bridge columns. A parametric study was conducted to evaluate the horizontal force, deformation, and confining strain response of the retrofitted RC bridge columns using the computational model. The response of the FE models with different number of FRP plies in the jacket was investigated. The analytical results suggested that increasing the number of FRP plies in the jacket significantly changed the confining strains response of the confined cross-section but the global force-deformation was not significantly affected.
Book Synopsis Nonlinear Analysis of Reinforced Concrete Bridge Columns with Confinement Effect by : Seigo Nasu
Download or read book Nonlinear Analysis of Reinforced Concrete Bridge Columns with Confinement Effect written by Seigo Nasu and published by . This book was released on 1990 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Computational Evaluation of Reinforced Concrete Bridge Beam-column Connections for Seismic Performance by : Clay Joshua Naito
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:
Book Synopsis Deterioration Analysis of a 37 Year Old Reinforced Concrete Bridge Deck by : Mark A. Heckenmueller
Download or read book Deterioration Analysis of a 37 Year Old Reinforced Concrete Bridge Deck written by Mark A. Heckenmueller and published by . This book was released on 1992 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Determining the Capacity of Deteriorated Reinforced Concrete Bridge Structures Under Seismic Loading by :
Download or read book Determining the Capacity of Deteriorated Reinforced Concrete Bridge Structures Under Seismic Loading written by and published by . This book was released on 2013 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the continual deterioration of the US infrastructures, the matter of safety is consistently in question. Records show that 80% of the entire US transportation infrastructure, such as bridges, roads, railways, etc. is either deficient or functionally obsolete. This thesis focuses specifically on the seismic capacity and demand of bridge structures at different levels of deterioration that may occur over time. This thesis also relates the design demand and capacity of the original and deteriorated bridges. The purpose is to show that the existing conditions of deteriorated bridges are more critical under earthquake loading than expected. A simple bridge design was constructed using design guidelines from Caltrans. Accelerograms were taken from recorded earthquakes within the state of California. The model was developed in SAP2000 and nonlinear time-history analyses where performed for multiple earthquake motions to demonstrate the demand and the capacity of the bridge. Deterioration was predetermined as a 10, 25, and 50 percent reduction in the diameter of the longitudinal reinforcement bars and therefore, 15, 37.5, and 75 percent reduction in the diameter of the lateral reinforcement bars. The results did confirm that with deterioration, even as little as ten percent, the bridge was no longer able to provide the displacement capacity that it was originally designed for and failed when the displacement demands were larger than this reduced capacity. Current methods utilize only dead and live loads to determine the maximum load-carrying capacity of a structure; deterioration is not explicitly accounted for. The contribution of this thesis is a set of first-of-a-kind nonlinear time-history analyses that examine the two dimensional behavior of columns at critical sections, such that evaluation of the columns' reduction in rotation capacity due to deterioration under seismic loading can be formalized.
Book Synopsis Shear Strength and Deformability of RC Bridge Columns Subjected to Inelastic Cyclic Displacements by : Mark Aschheim
Download or read book Shear Strength and Deformability of RC Bridge Columns Subjected to Inelastic Cyclic Displacements written by Mark Aschheim and published by . This book was released on 1992 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of Italian Concrete Days 2016 by : Marco di Prisco
Download or read book Proceedings of Italian Concrete Days 2016 written by Marco di Prisco and published by Springer. This book was released on 2018-04-16 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the best peer-reviewed papers presented at the Italian Concrete Days national conference, held in Rome, Italy, on October 27-28, 2016. The conference topics encompass the aspects of design, execution, rehabilitation and control of concrete structures, with particular reference to theory and modeling, applications and realizations, materials and investigations, technology and construction techniques. The contributions amply demonstrate that today’s structural concrete applications concern not only new constructions, but more and more rehabilitation, conservation, strengthening and seismic upgrading of existing premises, and that requirements cover new aspects within the frame of sustainability, including environmental friendliness, durability, adaptability and reuse of works and / or materials. As such the book represents an invaluable, up-to-the-minute tool, providing an essential overview of structural concrete, as well as all new materials with cementitious matrices.
Book Synopsis Earthquake Resilient Bridge Columns Utilizing Damage Resistant Hybrid Fiber Reinforced Concrete by : William Dean Trono
Download or read book Earthquake Resilient Bridge Columns Utilizing Damage Resistant Hybrid Fiber Reinforced Concrete written by William Dean Trono and published by . This book was released on 2014 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern reinforced concrete bridges are designed to avoid collapse and to prevent loss of life during earthquakes. To meet these objectives, bridge columns are typically detailed to form ductile plastic hinges when large displacements occur. California seismic design criteria acknowledges that damage such as concrete cover spalling and reinforcing bar yielding may occur in columns during a design-level earthquake. The seismic resilience of bridge columns can be improved through the use of a damage resistant hybrid fiber reinforced concrete (HyFRC). Fibers delay crack propagation and prevent spalling under extreme loading conditions, and the material resists many typical concrete deterioration mechanisms through multi-scale crack control. Little is known about the response of the material when combined with conventional reinforcing bars. Therefore, experimental testing was conducted to evaluate such behaviors. One area of focus was the compression response of HyFRC when confined by steel spirals. A second focus was the tensile response of rebar embedded in HyFRC. Bridge columns built with HyFRC would be expected to experience both of these loading conditions during earthquakes. The third focus of this dissertation was the design, modeling, and testing of an innovative damage resistant HyFRC bridge column. The column was designed to rock about its foundation during earthquakes and to return to its original position thereafter. In addition to HyFRC, it was designed with unbonded post-tensioning, unbonded rebar, and headed rebar which terminated at the rocking plane. Because of these novel details, the column was not expected to incur damage or residual displacements under earthquake demands exceeding the design level for ordinary California bridges. A sequence of scaled, three dimensional ground motion records was applied to the damage resistant column on a shaking table. An equal scale reinforced concrete reference column with conventional design details was subjected to the same motions for direct comparison. Compression tests showed that the ductility of HyFRC is superior to concrete in the post-peak softening branch of the response. HyFRC achieved a stable softening response and had significant residual load capacity even without spiral confinement. Concrete required the highest tested levels of confinement to achieved comparable post-peak ductility. Tension tests showed that HyFRC provides a substantial strength enhancement to rebar well beyond their yield point. Interesting crack localization behavior was observed in HyFRC specimens and appeared to be dependent on the volumetric ratio of rebar. The damage resistant HyFRC bridge column attained its design objectives during experimental testing. It exhibited pronounced reentering behavior with only light damage under earthquake demands 1.5 to 2.0 times the design level. It accumulated only 0.4% residual drift ratio after seven successive ground motions which caused a peak drift ratio of 8.0%. The conventional reinforced concrete column experienced flexural plastic hinging with extensive spalling during the same seven motions. It accumulated 6.8% residual drift ratio after enduring a peak drift ratio of 10.8%.
Book Synopsis The Effects of a Large Velocity Pulse on Reinforced Concrete Bridge Columns by : Gregory L. Orozco
Download or read book The Effects of a Large Velocity Pulse on Reinforced Concrete Bridge Columns written by Gregory L. Orozco and published by . This book was released on 2001 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Strength Evaluation of Existing Reinforced Concrete Bridges by : Roy A. Imbsen
Download or read book Strength Evaluation of Existing Reinforced Concrete Bridges written by Roy A. Imbsen and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: