Download or read book Visual Inspection Capacity Assessment of Earthquake Damaged Reinforced Concrete Bridge Elements written by and published by . This book was released on 2008 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Introduction to Bridge Inspection for Construction Managers written by J. Paul Guyer, P.E., R.A. and published by Guyer Partners. This book was released on 2022-05-24 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introductory technical guidance for construction managers interested in inspection of bridges. Here is what is discussed: 1. INSPECTION TYPES AND INTERVALS, 2. INSPECTION PROCEDURES.

Download or read book Focus written by and published by . This book was released on 2005 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Crack based Damage Assessment of In service Reinforced Concrete Bridge Members written by Jarrod Robert Zaborac and published by . This book was released on 2017 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reinforced concrete bridge infrastructure is typically evaluated based on visually observed cracking/damage. However, traditional inspection procedures typically provide little-to-no insight into the remaining capacity of the inspected member. Although more rigorous methods have been proposed in the literature that offer quantitative insight into a structure’s health (with various levels of success), no procedure has been widely adopted. Furthermore, many of these proposed procedures have not been validated by experimental data. Experimental visual crack data were collected into a database to provide researchers and practitioners a means of developing and evaluating crack-based shear strength assessment procedures. The database has an emphasis on members which are similar in detail or scale to typical bridge elements. The database was subsequently used to evaluate a proposed mechanics-based damage assessment procedure based on an inverse solution of the modified compression field theory. In addition to visually observed crack characteristics (e.g., crack width and inclination), the proposed procedure relies upon basic material properties and design details. Average load proportions are estimated as a part of the procedure, therefore actual loading conditions (e.g., M/V∙d ratio for a beam) need not be known to calculate an estimate of an element’s residual capacity. Results from 420 analyses on beams from three experimental programs carried-out with the procedure show the potential of a mechanics-based procedure for the crack-based shear strength assessment of reinforced concrete bridge members. The average predicted-to-experimental ratio for normalized shear strength (i.e., capacity-in-use) was reasonable for two of the experimental series (0.98 – 1.17); however, results from the third group of beams trended much more conservatively (average predicted-to-experiment ratio of 1.43). Overall, the procedure is relatively simple and general in its application and shows promise as an evaluation tool.

Download or read book Building for the Future Durable Sustainable Resilient written by Alper Ilki and published by Springer Nature. This book was released on 2023-07-04 with total page 1808 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the proceedings of the fib Symposium “Building for the future: Durable, Sustainable, Resilient”, held in Istanbul, Turkey, on 5–7 June 2023. The book covers topics such as concrete and innovative materials, structural performance and design, construction methods and management, and outstanding structures. fib (The International Federation for Structural Concrete) is a not-for-profit association whose mission is to develop at an international level the study of scientific and practical matters capable of advancing the technical, economic, aesthetic, and environmental performance of concrete construction.

Download or read book Seismic Design Aids for Nonlinear Pushover Analysis of Reinforced Concrete and Steel Bridges written by Jeffrey Ger and published by CRC Press. This book was released on 2016-04-19 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonlinear static monotonic (pushover) analysis has become a common practice in performance-based bridge seismic design. The popularity of pushover analysis is due to its ability to identify the failure modes and the design limit states of bridge piers and to provide the progressive collapse sequence of damaged bridges when subjected to major earthq

Download or read book Vibration based Damage Assessment and Residual Capacity Estimation of Bridges written by Reza Baghaei Naeini and published by . This book was released on 2011 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, various aspects of vibration-based damage assessment of bridge structures are investigated. Results of application of novel methodologies in vibration-based damage assessment of structures in the presence of wide range of real seismic damage and from noisy and incomplete measurements are presented and discussed. The first part of this dissertation is devoted to experimental modal analysis. Two output-only and input-output system identification techniques are applied for identification of modal properties of the bridge from ambient vibrations and responses to high amplitude earthquake excitations respectively. An optimization-based finite element (FE) model updating methodology is applied for identification of damage characteristics by monitoring the variations in stiffness properties of critical elements of the bridge. A hybrid optimization procedure based on Genetic Algorithm (GA) and quasi-Newton optimization techniques is implemented for finding the best set of FE model parameters that minimizes the objective functions. Two objective functions are defined expressing the discrepancy between the measured and analytical response characteristics in time and modal domains. The meaningful agreement between FE model parameters identified using time and modal domains data with experimental stiffness indices indicates the efficiency and accuracy of the proposed damage identification procedure. In the final part of the dissertation, two vibration-based procedures are presented and applied for investigation of the consequences of damage in collapse capacity and functionality status of the bridge. The first procedure takes advantage of a double-integration and filtering routine to estimate the maximum drift ratios experienced by the lateral force resisting elements of the bridge from acceleration measurements. Estimated drift ratios along with pushover curves of the corresponding elements are used to calculate the ductility-based residual capacity of the elements and the bridge. The second procedure utilizes the incremental dynamic analysis (IDA) curves for estimation of collapse capacity of the bridge. A new approach for generation of FE model realizations of the earthquake damaged structures is proposed and applied. Generated FE realizations of the damaged bridge are used to estimate the collapse capacity of the structure. Amount of loss in collapse capacity along with seismic hazard characteristics at the bridge site and a set of tagging criteria are utilized for tagging and determination of the functionality status of the damaged bridge. Accuracy and reliability of the residual capacity estimation procedures are evaluated and verified by the results of a shake table experiment on a large-scale model of a reinforced concrete bridge.

Download or read book Post earthquake Bridge Damage Mitigation written by Amarjeet Saini and published by . This book was released on 2013 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rapid Visual Screening of Buildings for Potential Seismic Hazards Supporting Documentation written by and published by Government Printing Office. This book was released on 2015 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Rapid Visual Screening (RVS) handbook can be used by trained personnel to identify, inventory, and screen buildings that are potentially seismically vulnerable. The RVS procedure comprises a method and several forms that help users to quickly identify, inventory, and score buildings according to their risk of collapse if hit by major earthquakes. The RVS handbook describes how to identify the structural type and key weakness characteristics, how to complete the screening forms, and how to manage a successful RVS program.

Download or read book Image based Condition Assessment for Concrete Bridge Inspection written by Ram Sebak Adhikari and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seismic Capacity Evaluation of a Reinforced Concrete Bridge Via a Calibrated Finite Element Method written by Steve S. Kith and published by . This book was released on 2000 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Review of Current NDE Technologies for Post earthquake Assessment of Retrofitted Bridge Columns written by Jianwei Song and published by . This book was released on 2006 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inspection and Monitoring Techniques for Bridges and Civil Structures written by Gongkang Fu and published by CRC Press. This book was released on 2005-11-29 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses techniques that require physical measurement for inspection, and/or monitoring of structures.

Download or read book Post earthquake Damage Repair and Probabilistic Damage Control Approach for Reinforced Concrete Bridges written by Amarjeet Saini and published by . This book was released on 2014 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objectives of the study were to develop post-earthquake repair methods using carbon fiber reinforced polymers (CFRP) and probabilistic damage control approach (PDCA) for reinforced concrete (RC) bridges. To develop repair methods, first repair objectives were defined. To define repair objectives, internal earthquake damage was quantified and correlated to a series of visible damage states (DSs). Bridge columns are designed to be the primary source of energy dissipation through nonlinear action under seismic loading and experience a wide range of apparent damage. Therefore, in the present study, DSs for bridge columns were used as a guide to define damage states for other bridge components. The degree of damage in columns depends on the earthquake level (seismic demand). Due to uncertainties in seismic demand and response, damage to bridge columns is probabilistic in nature. In the present study, in addition to bridge repair, a probabilistic damage control approach PDCA was developed for new and repaired bridge columns by incorporating the extent of lateral displacement nonlinearity defined by "Damage Index" (DI) and reliability analysis. The performance objective was defined based on predefined apparent DSs and the DSs were correlated to damage indices based on a previous study at the University of Nevada, Reno. The correlation between DI and DS was determined from a statistical analysis (resistance model) of over 140 response data measured from testing of 22 bridge column models subjected to seismic loads. To accomplish the objectives of this study, the present study was divided into seven parts. The first part was to conduct a detailed review of damage and repair methods in past earthquakes to identify gaps in repair methods. The second part was to develop practical methods to access the condition of an earthquake damaged bridge structural components in terms of apparent DS's. In the third part, repair design recommendations and design examples were developed to aid bridge engineers in quickly designing the number of CFRP layers based on the apparent DS. The fourth part was to establish a resistance model for the reliability analysis to develop a probabilistic based seismic design of bridge columns. In the fifth part, a load model was developed by conducting a large number of non-linear dynamic analyses on bridge bents. The uncertainties in ground motions, site class, bent configuration, earthquake return period were included in the analyses. In the sixth part of the study, the results of the reliability analyses were investigated, and a direct probabilistic design procedure was developed to calibrate design DI based on target reliability against failure. Finally, the PDCA methodology that was developed for conventional columns was used to extend the PDCA and reliability analysis approach to earthquake-damaged columns that have been repaired. Through this study, a new simple non-iterative method was developed for design of CFRP fabrics used in repair of concrete members. The step-by-step repair methods for bridge components that were developed as part of this study address a gap in rational and systematic repair tools that are needed subsequent to moderate and strong earthquakes. The PDCA that was developed and investigated provides design tools enabling designers and researchers to detail bridge columns for a target expected damage with an associated probability of occurrence and a reliability index.

Download or read book Performance based Seismic Bridge Design written by M. Lee Marsh and published by Transportation Research Board. This book was released on 2013 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 440, Performance-Based Seismic Bridge Design (PBSD) summarizes the current state of knowledge and practice for PBSD. PBSD is the process that links decision making for facility design with seismic input, facility response, and potential facility damage. The goal of PBSD is to provide decision makers and stakeholders with data that will enable them to allocate resources for construction based on levels of desired seismic performance"--Publisher's description.

Download or read book Adaptive Reliability Analysis of Reinforced Concrete Bridges Using Nondestructive Testing written by Qindan Huang and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: There has been increasing interest in evaluating the performance of existing reinforced concrete (RC) bridges just after natural disasters or man-made events especially when the defects are invisible, or in quantifying the improvement after rehabilitations. In order to obtain an accurate assessment of the reliability of a RC bridge, it is critical to incorporate information about its current structural properties, which reflects the possible aging and deterioration. This dissertation proposes to develop an adaptive reliability analysis of RC bridges incorporating the damage detection information obtained from nondestructive testing (NDT). In this study, seismic fragility is used to describe the reliability of a structure withstanding future seismic demand. It is defined as the conditional probability that a seismic demand quantity attains or exceeds a specified capacity level for given values of earthquake intensity. The dissertation first develops a probabilistic capacity model for RC columns and the capacity model can be used when the flexural stiffness decays nonuniformly over a column height. Then, a general methodology to construct probabilistic seismic demand models for RC highway bridges with one single-column bent is presented. Next, a combination of global and local NDT methods is proposed to identify in-place structural properties. The global NDT uses the dynamic responses of a structure to assess its global/equivalent structural properties and detect potential damage locations. The local NDT uses local measurements to identify the local characteristics of the structure. Measurement and modeling errors are considered in the application of the NDT methods and the analysis of the NDT data. Then, the information obtained from NDT is used in the probabilistic capacity and demand models to estimate the seismic fragility of the bridge. As an illustration, the proposed probabilistic framework is applied to a reinforced concrete bridge with a one-column bent. The result of the illustration shows that the proposed framework can successfully provide the up-to-date structural properties and accurate fragility estimates.

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.