Download or read book Progressive Collapse Analysis of Reinforced Concrete Flat Slab Structures Considering Post punching and Dynamic Response written by Nsikak Ulaeto and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progressive Collapse Resistance of Reinforced and Post tensioned Concrete Flat Plate Structures written by Leila Keyvani and published by . This book was released on 2015 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flat plates are found to be susceptible to progressive collapse which has rarely been investigated at the system-level. One of the methods to evaluate the response of structures to progressive collapse is to impose initial damage to the "actual" buildings. Column removal scenarios have been investigated in actual buildings using wired data acquisition systems. In the first part of this dissertation a wireless data acquisition system capable of peer-to-peer and multi-hop communication is developed that would replace and overcome the constraints and drawbacks of wired systems. Using field data, the progressive collapse resistance of an actual post-tensioned flat plate parking garage is analytically evaluated after an interior column is dynamically removed. The tendons and the interaction of the tendons and floor are modeled explicitly. The slab had no bottom bars yet successfully redistributed the gravity load to the adjacent columns without failure. Compressive membrane forces developed as a result of growth tendency contributed to an increase of the gravity load carrying capacity of slab. Use of total moments developed in post-tensioned slab sections were found to be misleading in identifying the contribution of different portions of the post-tensioned slab to collapse resistance. The punching and post-punching failure of an isolated and simply supported slab-column specimen is analytically evaluated. The model was verified against available experimental result. The model was improved to account for the effect of compressive membrane forces in the slab. Using the method developed, the system-level response after a column loss of a reinforced concrete flat plate floor designed according to ACI 318-11 and ACI 352.1R with and without the effects of membrane forces is presented. The results show that the compressive membrane forces increase the punching strength of the slab and help mitigate progression of punching failures to the adjacent columns. Previous studies showed that the bottom integrity bars in flat plates play a significant role in the load transfer after punching failure. ACI 318-11, however, has no minimum requirement for the integrity steel size passing over the column. A simple FE model is introduced to evaluate the post-punching response of flat plates. The simple model was first verified against the results of an analysis carried out in this dissertation. Then, the post-punching response of a flat plate designed based on ACI 318-11 is investigated using the model mentioned. It was found that following the punching failure of an overloaded column, there is a risk of bar fracture at a deflection of about one third of the slab depth for the flat plate detailed according to ACI 318-11. Increasing the bar diameter and steel rupture strain increases the maximum post-punching strength and deformation capacity of the connection before bar fracture.
Download or read book Guide to the design and construction of reinforced concrete flat slabs written by and published by . This book was released on 2007-01-01 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progressive Collapse of Reinforced Concrete Flat Slab Structures written by Justin Russell and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progressive Collapse Resilience of Concrete Structures Mechanisms Simulations and Experiments written by Kai Qian and published by Springer Nature. This book was released on 2023-07-08 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book introduces the comprehensive analysis methodology regarding progressive collapse, and the critical issues may happen in concrete structures. Main topics include: the influential parameters of the development of the main load-resisting mechanisms; the dynamic effects with sudden column removal scenarios; the contribution of non-structural components to improve the resilience of concrete structures; uncertainties in progressive collapse analysis. Based on the empirical research of the author and his team, the book provides valuable knowledge in the field of progressive collapse and bridges the gap between academic research and practice.
Download or read book Proceedings of SECON 21 written by Giuseppe Carlo Marano and published by Springer Nature. This book was released on 2021-09-03 with total page 1127 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers peer-reviewed contributions presented at the International Conference on Structural Engineering and Construction Management (SECON’21), held on 12-15 May 2021. The meeting served as a fertile platform for discussion, sharing sound knowledge and introducing novel ideas on issues related to sustainable construction and design for the future. The respective contributions address various aspects of numerical modeling and simulation in structural engineering, structural dynamics and earthquake engineering, advanced analysis and design of foundations, BIM, building energy management, and technical project management. Accordingly, the book offers a valuable, up-to-date tool and essential overview of the subject for scientists and practitioners alike, and will inspire further investigations and research.
Download or read book Blast Effects on Buildings written by David Cormie and published by Thomas Telford Publishing. This book was released on 2009 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflects developments in the field of blast engineering since the early 1990s. Combining coverage of the design standards, codes and materials with an appreciation of the needs and demands of the designer, this book provides the engineer with a comprehensive source of reference for the main elements of blast engineering design in modern practice.
Download or read book Recueil factice d articles de presse sur Firmin G mier et l Od on 1er d c 1921 avr 1922 written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Macromodel based Progressive Collapse Simulation of Reinforced Concrete Structures written by Yihai Bao and published by . This book was released on 2008 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progressive Collapse Analysis of Reinforced Concrete Buildings Under Blast Loadings written by Sahar Mirhosseini and published by . This book was released on 2007 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last two decades, a significant number of embassies, commercial centers, governmental structures, industrial facilities, and residential buildings have been attacked by explosives. Consequently, blast-resistant design of structures has gained importance in recent years to minimize structural damage and threat to life safety. Some guidelines have been developed for this purpose, based on previously conducted research. The U.S. General Services Administration (GSA) report is one of these guidelines that provide practical solutions to blast-related engineering problems, including requirements for analysis and design for prevention of progressive collapse in structures. The guidelines also help establish the potentials for progressive collapse in existing buildings.
Download or read book Investigation of the Effects of Dynamic Loads on Reinforced Concrete Flat plate Buildings Under Collapse Scenarios written by Aamer H. Jawdhari and published by . This book was released on 2018 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the initial stages of a collapse, failure of the initiating member (i.e. column loss) can cause a dynamic load redistribution in the surrounding members. The ability of the structure to withstand these dynamically redistributed loads will determine if the building is susceptible to collapse. If the surrounding members cannot support the redistributed load, the second stage of progressive collapse can happen. In this stage, there is falling debris from the failed members surrounding the removed column and dynamic impact on the floors below. Furthermore, while the behavior of RC members under static and high-rate (blast) loads are well researched, there is less information about the response under medium rate loads that occur during collapse. This research first looks specifically at flat-plate slab column connections to study the effect of collapse loading rate on the slab column connection behavior and how that behavior changes the collapse potential of the building. Second, the effect of falling debris load on the lower floors of flat-plate buildings during the collapse is investigated.
Download or read book Failures in Concrete Structures written by Robin Whittle and published by CRC Press. This book was released on 2012-11-01 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a selection of the author‘s firsthand experience with incidents related to reinforced and prestressed concrete structures, helping readers gain an understanding of errors that can occur in order to avoid making them. He includes mistakes discovered at the design stage, ones that led to failures, and some that involved partial structure collapse all of which required remedial action to ensure safety. The book focuses on specific incidents that occurred at various points in the construction process, including mistakes related to structural misunderstanding, extrapolation of codes of practice, and poor construction.
Download or read book Progressive Collapse of Structures written by Uwe Starossek and published by ICE Publishing. This book was released on 2017-12-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progressive Collapse of Structures, Second edition provides structural engineers with the practical and systematic frameworks they need to anticipate the risk of progressive and/or disproportionate collapse, and to apply this knowledge to the design of new structures as well as the retrofit design of existing structures.
Download or read book Handbook for Blast Resistant Design of Buildings written by Donald O. Dusenberry and published by John Wiley & Sons. This book was released on 2010-01-26 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unique single reference supports functional and cost-efficient designs of blast resistant buildings Now there's a single reference to which architects, designers, and engineers can turn for guidance on all the key elements of the design of blast resistant buildings that satisfy the new ASCE Standard for Blast Protection of Buildings as well as other ASCE, ACI, and AISC codes. The Handbook for Blast Resistant Design of Buildings features contributions from some of the most knowledgeable and experienced consultants and researchers in blast resistant design. This handbook is organized into four parts: Part 1, Design Considerations, sets forth basic principles, examining general considerations in the design process; risk analysis and reduction; criteria for acceptable performance; materials performance under the extraordinary blast environment; and performance verification for technologies and solution methodologies. Part 2, Blast Phenomena and Loading, describes the explosion environment, loading functions needed for blast response analysis, and fragmentation and associated methods for effects analysis. Part 3, System Analysis and Design, explains the analysis and design considerations for structural, building envelope, component space, site perimeter, and building system designs. Part 4, Blast Resistant Detailing, addresses the use of concrete, steel, and masonry in new designs as well as retrofitting existing structures. As the demand for blast resistant buildings continues to grow, readers can turn to the Handbook for Blast Resistant Design of Buildings, a unique single source of information, to support competent, functional, and cost-efficient designs.
Download or read book Evaluation of the Effects of In plane Lateral Restraint and Reinforcement Ratio on the Punching Capacity of Flat Slab Column Specimens written by Christopher Robert Henquinet and published by . This book was released on 2013 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Localized damage to certain structural members in a building can trigger a chain reaction which results in a partial or complete collapse of the building. A collapse of this nature is called a progressive collapse and has the potential to cause significantly more damage than would be expected from the failure of the first member. This research project is particularly concerned with the potential of progressive collapses in older flat plate reinforced concrete structures. The nature of the design of these structures puts them at risk for progressive collapses normally resulting from punching shear failures at the slab column connections. The goal of this research is to investigate the behavior of slab column specimens in a setup that more closely resembles a complete structure by applying in-plane lateral restraints. In a structure compressive membrane action can help to increase the capacity of the connection prior to a failure occurring and tensile membrane action can increase the residual capacity of a connection after it has failed. Specifically the experimental tests examine the effects of in plane lateral restraint on the punching shear capacity of the slabs prior to failure and the effects of reinforcement ratio before and after the failure occurs. Better estimation of the punching shear capacity will lead to better prediction if the punching shear failure will cause a progressive collapse. Isolated slab column specimens were constructed with two different reinforcement ratios (0.5% and 1.0%) and tested in two different test setups (without lateral restraint and with lateral restraint). The slab column specimens were constructed following the provisions in the 1971 American Concrete Institute design code. The goal of the testing was to simulate a progressive collapse scenario where a nearby supporting column had been damaged. Slabs tested with the higher reinforcement ratio had punching shear capacities that were at least 130% of the capacities of the specimens with lower reinforcement ratios. It was found that the unrestrained slab with the 1.0% reinforcement ratio had a punching capacity just over 69 kips which is very close to the ACI equations capacity estimation (70 kip) while the unrestrained slab with the 0.5% reinforcement ratio had a punching capacity of just under 52 kips. The effects of the addition of in-plane lateral restraint were not as well defined. The restrained slab with the 1% reinforcement ratio had a punching capacity of 74 kips and the retrained slab with 0.5% reinforcement had a capacity of 54 kips. The restrained slabs showed little to no increase in punching shear capacity due to the in-plane lateral restraint. However, the actual stiffness of the test setup (500 kip/in) was much lower than the designed stiffness (1600 kip/in) therefore the full benefits of the in-plane restraint may not have be realized. The post punching capacity of the slab column specimens was also investigated. All four of the specimens tested had peak residual capacities of more than 70% of the punching capacity. This residual capacity may be capable of arresting the progression of collapse. These residual capacities are higher than the estimated residual capacities based on previous research work possibly the result of the reinforcement being hooked at the edges of the slab specimens.
Download or read book Preventing Progressive Collapse of Flat Plate Structures with an Irregular Layout of Structural Integrity Reinforcement written by Michael Egberts and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progressive Collapse written by Daniel Justin Reese Morone and published by . This book was released on 2012 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research results provide valuable information to the study of progressive collapse as the behavior and response of a reinforced concrete structure subjected to multiple column losses is investigated and discussed at length. The proposed procedure and model are suggested for use by engineers for the quick and simple check of a structure's ability to resist progressive collapse. The final simplified model consists of only a few frame elements and is developed for general use of analyzing different types of building structures.
