Download or read book Thermal Behavior for Steel Column Subjected to Fire in Transient Condition written by and published by . This book was released on 2007 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis of Thermally Induced Forces in Steel Columns Subjected to Fire written by Chung Thi Thu Ho and published by . This book was released on 2010 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects that thermally induced forces and deformations have on the performance and safety of steel columns subjected to fire are not well understood and are not clearly treated in building codes and standards. This thesis investigates the behavior of steel columns subjected to fire, with an emphasis on studying the significance of thermally induced forces and deformations. The approach used in this research is to conduct a series of analyses of steel columns using the finite element computer program ABAQUS. Columns are modeled in ABAQUS using beam elements that include nonlinear geometry, nonlinear temperature dependent material properties, and initial geometric imperfections. Using the ABAQUS model, a series of analyses are conducted on the behavior of columns under axial compression for temperatures varying from room temperature up to 2400° F.A series of individual columns are analyzed with and without restraint to thermal expansion. A column that is part of a truss is also analyzed to study a simple case of a flexible restraint to thermal expansion. Finally, the behavior of columns that are part of multi-story steel moment frames are investigated. All of the analyses conducted in this research indicate that forces generated by restraint to thermal expansion can have a very large impact on the performance of a steel column in fire. When evaluating the safety of a column in a fire, it is important to recognize that the total axial force in the column is the sum of the force generated by external gravity load on the frame and the force generated by restraint to thermal expansion. The force generated by restrained thermal expansion can be very large, and neglecting this force can lead to unsafe designs.

Download or read book Reliability of Steel Columns Protected by Intumescent Coatings Subjected to Natural Fires written by Chao Zhang and published by Springer. This book was released on 2016-10-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis studied the effect of aging of intumescent coatings (ICs) on the reliability of protected steel columns in fire condition and developed a probabilistic approach to assess the service life of ICs applied on steel columns. In the study, Monte Carlo simulations were conducted to obtain the reliability index or failure probability of steel columns protected by ICs subjected to compartment fires. The effect of aging of intumescent coatings on the failure probability of protected steel columns was investigated by using variable insulation property of intumescent coatings in the simulation. The test data on aging effect on insulation property of intumescent coatings from literature was used. Based on the reliability analysis, a probabilistic approach is given to determine the service life of intumescent coatings for steel columns. In that approach, the failure probability of the protected steel columns is compared with the target probability of the structural fire design. The approach can also be used for probabilistic analysis of steel columns protected by conventional inert fire protection materials.

Download or read book Creep Buckling Behavior of Steel Columns Subjected to Fire written by Mohammed Ali Morovat and published by . This book was released on 2014 with total page 990 pages. Available in PDF, EPUB and Kindle. Book excerpt: The essence of performance-based structural fire safety design of steel building structures is the ability to predict thermal and structural response to fire. An important aspect of such predictions is the ability to evaluate strength of columns at elevated temperatures. Columns are critical structural elements, and failure of columns can lead to collapse of a structure. The ability of steel columns to carry their design loads is greatly affected by timeand temperature-dependent mechanical properties of steel at high temperatures due to fire. It is well known that structural steel loses strength and stiffness with temperature, especially at temperatures above 400 °C. Further, the reductions in strength and stiffness of steel are also dependent on the duration of exposure to elevated temperatures. The time-dependent response or creep of steel plays a particularly important role in predicting the collapse load of steel columns subjected to fire temperatures. Specifically, creep of steel leads to the creep buckling phenomenon, where the critical buckling load for a steel column depends not only on slenderness and temperature, but also on duration of exposure to fire temperatures. The main focus of the research summarized in this dissertation is on a testing program to investigate the effects of time-dependent material behavior or creep on buckling of steel columns subjected to fire. Material characterization tests were conducted at temperatures up to 1000 °C to evaluate tensile and creep properties of ASTM A992 steel at elevated temperatures. In addition, buckling tests on W4×13 wide flange columns under pin-end conditions were conducted to characterize short-time and vii creep buckling phenomena at elevated temperatures. The column test results are further used to verify analytical and computational tools developed to model the time-dependent buckling of steel columns at elevated temperatures. Test results are also compared against code-based predictions such as those from Eurocode 3 and the AISC Specification. Results of the research study presented in this dissertation clearly indicate that thermal creep of steel has a very large effect on strength of steel columns at high temperatures due to fire. The effect of creep on column capacity at high temperatures can be predicted using analytical and computational approaches presented in this dissertation.

Download or read book Temperature Calculation in Fire Safety Engineering written by Ulf Wickström and published by Springer. This book was released on 2016-05-25 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a consistent scientific background to engineering calculation methods applicable to analyses of materials reaction-to-fire, as well as fire resistance of structures. Several new and unique formulas and diagrams which facilitate calculations are presented. It focuses on problems involving high temperature conditions and, in particular, defines boundary conditions in a suitable way for calculations. A large portion of the book is devoted to boundary conditions and measurements of thermal exposure by radiation and convection. The concepts and theories of adiabatic surface temperature and measurements of temperature with plate thermometers are thoroughly explained.Also presented is a renewed method for modeling compartment fires, with the resulting simple and accurate prediction tools for both pre- and post-flashover fires. The final chapters deal with temperature calculations in steel, concrete and timber structures exposed to standard time-temperature fire curves. Useful temperature calculation tools are included, and several examples demonstrate how the finite element code TASEF can be used to calculate temperature in various configurations. Temperature Calculation in Fire Safety Engineering is intended for researchers, students, teachers, and consultants in fire safety engineering. It is also suitable for others interested in analyzing and understanding fire, fire dynamics, and temperature development. Review questions and exercises are provided for instructor use.

Download or read book Failure Consequences and Reliability Acceptance Criteria for Exceptional Building Structures written by Michael H. Faber and published by vdf Hochschulverlag AG. This book was released on 2004 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance Based Fire Engineering of Structures written by Yong Wang and published by CRC Press. This book was released on 2012-06-22 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: Major events—notably the Broadgate fire in London, New York’s World Trade Center collapse, and the Windsor Tower fire in Madrid—as well as the enlightening studies at the Cardington fire research project have given international prominence to performance-based structural fire engineering. As a result, structural fire engineering has increasingly attracted the interest not only of fire and structural engineers but also of researchers and students. And studies in recent years have generated a vast number of findings. Performance-Based Fire Engineering of Structures summarizes the latest knowledge on performance-based approaches to structural fire engineering, enabling readers to critically assess research in the field. Whereas most recent books have been mainly concerned with dissemination of principles encapsulated in established codes of practice such as the Eurocodes, this work addresses in depth: Global structural behaviour and modelling Progressive collapse of structures in fire and the importance of connection robustness The integrity of compartmentation in fire Structural fire engineering under realistic fire conditions and its implications for material properties The limitations of research results and design methods The unexploited potential for advanced fire engineering design This authoritative book draws on the work of internationally active researchers who were core members of the European Network project’s COST C26 working group on fire resistance. It helps readers develop a thorough understanding of how to use advanced fire engineering design to improve structural safety and reduce construction costs.

Download or read book Behavior and Analysis of Fire exposed Steel Beam columns that Develop Thermal Gradients written by Spencer Edward Quiel and published by . This book was released on 2009 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research presented in this dissertation describes (for the first time) the fundamental behavior of steel beam-columns with thermal gradients, with emphasis on the case of the perimeter column. The study focuses on the performance of wide-flanged member types that are used as perimeter columns in typical North American steel frame construction. Both computational and experimental research results are used to (1) demonstrate the unique changes in capacity and demand experienced by beam-columns that develop thru-depth thermal gradients when exposed to fire, (2) examine the parameters that affect the use of computational models to predict the behavior of beam-columns in a high-rise steel moment frame exposed to fire, and (3) develop performance-based tools and methodologies to predict the demand and capacity of these members.

Download or read book Steel and Composite Structures written by Y.C. Wang and published by CRC Press. This book was released on 2003-09-02 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: Steel and Composite Structures: Behaviour and Design for Fire Safety presents a systematic and thorough description of the behaviour of steel and composite structures in fire, and shows how design methods are developed to quantify our understanding. Quantitative descriptions of fire behaviour, heat transfer in construction elements and structural analysis using numerical methods are all addressed and existing codes and standards for steel and composite fire safety design are critically examined. Using a comprehensive and systematic description of structural fire safety engineering principles, the author explains and illustrates the important difference between the behaviour of isolated structural elements and whole structures under fire conditions. This book is a vital source of information to structural and fire engineers. It will also be of considerable interest and value to students and researchers in this field.

Download or read book Structures in Fire written by Venkatesh Kodur and published by DEStech Publications, Inc. This book was released on 2010 with total page 1047 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance of Steel Columns Exposed to Fire written by Vute Chandrasekaran and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Steel columns are used in many high rise as well as industrial constructions. These columns act as the main load carrying member. In this paper results of analytical studies carried out to evaluate the performance mechanisms of steel columns exposed to fire have been presented. The finite element method is used to analyse the buckling behaviour of geometrically perfect steel columns at elevated temperatures. The column behaviour up to collapse was investigated considering geometric as well as material non-linearities. The analysis includes non-linear material characteristics as a function of temperature. The importance of proper idealisation of stress strain temperature behaviour has been brought out. The buckling characteristics of columns have been analysed for continuous stress-strain-temperature material behaviour as well as elasto-plastic bilinear idealisations. The influence of slenderness ratios was found to control the buckling behaviour of columns at elevated temperatures. Solutions have been provided to evaluate critical stresses of columns with different end fixity conditions. The factors which control the performance of columns exposed to fire have been discussed Comparisons have been made with other analytical approaches and available experimental data. It is believed that the fire safety engineer will be benefited from these studies.

Download or read book Design of Steel Concrete Composite Structures Using High Strength Materials written by J.Y. Richard Liew and published by Woodhead Publishing. This book was released on 2021-08-04 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-strength materials offer alternatives to frequently used materials for high-rise construction. A material of higher strength means a smaller member size is required to resist the design load. However, high-strength concrete is brittle, and high-strength thin steel plates are prone to local buckling. A solution to overcome such problems is to adopt a steel-concrete composite design in which concrete provides lateral restraint to steel plates against local buckling, and steel plates provide confinement to high-strength concrete. Design of Steel-Concrete Composite Structures Using High Strength Materials provides guidance on the design of composite steel-concrete structures using combined high-strength concretes and steels. The book includes a database of over 2,500 test results on composite columns to evaluate design methods, and presents calculations to determine critical parameters affecting the strength and ductility of high-strength composite columns. Finally, the book proposes design methods for axial-moment interaction curves in composite columns. This allows a unified approach to the design of columns with normal- and high-strength steel concrete materials. This book offers civil engineers, structural engineers, and researchers studying the mechanical performance of composite structures in the use of high-strength materials to design and construct advanced tall buildings. - Presents the design and construction of composite structures using high-strength concrete and high-strength steel, complementing and extending Eurocode 4 standards - Addresses a gap in design codes in the USA, China, Europe and Japan to cover composite structures using high-strength concrete and steel in a comprehensive way - Gives insight into the design of concrete-filled steel tubes and concrete-encased steel members - Suggests a unified approach to designing columns with normal- and high-strength steel and concrete

Download or read book Development of design rules for the fire behaviour of external steel structures written by S. Desanghère and published by . This book was released on 2007 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Predicting Fire Behavior of Composite CFT Columns Using Fundamental Section Behavior written by Amit H. Varma and published by . This book was released on 2010 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents the development and verification of a fiber-based analytical approach for predicting the behavior of concrete filled steel tube (CFT) columns subjected to constant axial load and standard fire loading. The approach consists of three parts: (1) Two-dimensional heat transfer analysis, (2) section moment-curvature analysis, and (3) column inelastic buckling analysis using modified Newmark's method. The analytical approach was verified by using it to predict (1) the thermal and structural behavior of CFT column specimens subjected to standard fire tests by different researchers and (2) the fundamental moment-curvature behavior of CFT beam-column specimens subjected to special (non-standard) fire tests conducted by the authors. The analytical approach predicts the fundamental moment-curvature behavior of CFT beam-column specimens and the standard fire behavior of CFT column specimens with reasonable accuracy. The analytical results also compare favorably with the overall behavior and stress states predicted by three-dimensional finite element analyses conducted earlier by the authors. The fiber-based analytical approach is recommended for modeling and predicting the standard, non-standard, or realistic fire behavior of CFT columns and beam-columns under various loading, heating, and boundary conditions.

Download or read book Structural Design for Fire Safety written by Andrew H. Buchanan and published by John Wiley & Sons. This book was released on 2017-01-30 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural Design for Fire Safety, 2nd edition Andrew H. Buchanan, University of Canterbury, New Zealand Anthony K. Abu, University of Canterbury, New Zealand A practical and informative guide to structural fire engineering This book presents a comprehensive overview of structural fire engineering. An update on the first edition, the book describes new developments in the past ten years, including advanced calculation methods and computer programs. Further additions include: calculation methods for membrane action in floor slabs exposed to fires; a chapter on composite steel-concrete construction; and case studies of structural collapses. The book begins with an introduction to fire safety in buildings, from fire growth and development to the devastating effects of severe fires on large building structures. Methods of calculating fire severity and fire resistance are then described in detail, together with both simple and advanced methods for assessing and designing for structural fire safety in buildings constructed from structural steel, reinforced concrete, or structural timber. Structural Design for Fire Safety, 2nd edition bridges the information gap between fire safety engineers, structural engineers and building officials, and it will be useful for many others including architects, code writers, building designers, and firefighters. Key features: • Updated references to current research, as well as new end-of-chapter questions and worked examples. •Authors experienced in teaching, researching, and applying structural fire engineering in real buildings. • A focus on basic principles rather than specific building code requirements, for an international audience. An essential guide for structural engineers who wish to improve their understanding of buildings exposed to severe fires and an ideal textbook for introductory or advanced courses in structural fire engineering.

Download or read book Analysis of Flame Retardancy In Polymer Science written by Henri Vahabi and published by Elsevier. This book was released on 2022-03-10 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analysis of Flame Retardancy in Polymer Science is a scientific/practical book that is conceptualized, designed, and written for students, early-career researchers, and junior engineers to explain the basic principles of fire analysis/characterization methods/methodologies, from flammability, ignition, and fire spread to forced convection and related analyses and to elucidate the mechanisms underlying flame retardancy in both gas and condensed phases followed by correlation between laboratory- and real-scale fire analyses as well as fire analysis from an industrial standpoint. This book is also an indispensable resource for identifying and mounting the latest achievements in fire analysis/characterization methods to frame the effects of fire evaluation strategies to be utilized for research and development. The book also gives a broad description of fire analysis related to different standards and regulations for different applications in different geographic zones. - Includes the background, fundamental, and modern features of techniques of characterization of fire and flame behavior - Provides an overview of the major techniques used in fire analysis of flame-retardant polymers - Characterizes different types of materials at small, bench, and real-life scale - Offers a comprehensive overview of fire behavior and testing and associated toxicity issues - Integrates the scientific, technical, standard, regulation, and industrial aspects of fire analysis into a book for future developments in the field

Download or read book Specifications for Structural Concrete ACI 301 05 with Selected ACI References written by American Concrete Institute and published by American Concrete Institute. This book was released on 2005 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: