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 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 2015-02-25 with total page 155 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 Material Properties of Steel in Fire Conditions written by Weiyong Wang and published by Academic Press. This book was released on 2019-11-10 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Material Properties of Steel Fire Conditions is a major new contribution on how to understand the material properties of steel in fires. The application of new types of steel and development of sophisticated codes of practice has grown dramatically in recent years, making this a timely resource on the topic. Under fire conditions, knowing the material properties of steel is essential in the fire resistance design of steel structures, such as in Eurocode3. This book shows that the reduction factors of mechanical properties of different steels are quite different. In recent years, the authors of this book have carried out significant testing on the material properties of several types of steels, such as Q460 steel, Q690 steel and A992 steel, etc. Users will find this new test data on the material properties of steel with temperature useful in evaluating the fire resistance of steel structures in their own projects. - Deals with the material properties of steels in fire conditions, including thermal properties and mechanical properties, such as thermal conductivity, strength, elastic modulus and creep behavior - Provides basic knowledge to perform fire resistance design of steel structures - Presents information useful to designers, researches and students who must conduct fire resistance design or perform structural analyses on high strength steel structures
Download or read book Behavior and Design of High Strength Constructional Steel written by Guo-Qiang Li and published by Woodhead Publishing. This book was released on 2020-10-21 with total page 663 pages. Available in PDF, EPUB and Kindle. Book excerpt: Behavior and Design of High-Strength Constructional Steel presents readers with extensive information on the behavior of high-strength constructional steels, providing them with the confidence they need to use them in a safe and economic manner to design and construct steel structures. The book includes detailed discussions on the mechanical properties of HHS while explaining the latest progress in research and design guidelines, including material properties at ambient and elevated temperatures. In addition, the book explains the behavior of elementary members subject to different types of loads and load combinations, and those that are integral to the design of bolted and welded connections. The hysteretic behavior of HHS materials and members are also discussed. This is critical for application and designs under earthquakes and fire conditions. The buckling behaviors of HSS box-section and H-section columns are included in terms of experimental and numerical investigations, along with the geometric imperfection induced by welding. - Provides a comprehensive review on the topic of high-strength constructional steel and the latest progress in research and design guidelines - Explains the behavior of elementary members subjected to different types of loads and load combinations - Recommends structural systems for using high-strength constructional steels in seismic zones
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 Analysis 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: 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 effect of elevated temperatures on the stress-strain characteristics of steel have been incorporated in these studies. Solutions have been provided to evaluate critical stresses of columns with different end fixity conditions. The influence of slenderness ratios was found to control the building behaviour of columns at elevated temperatures. 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. Results are presented in a form that could be of use to fire safety engineers.
Download or read book Guide to Stability Design Criteria for Metal Structures written by Ronald D. Ziemian and published by John Wiley & Sons. This book was released on 2010-02-08 with total page 1120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive guide to stability design criteria, fully updated and incorporating current research Representing nearly fifty years of cooperation between Wiley and the Structural Stability Research Council, the Guide to Stability Design Criteria for Metal Structures is often described as an invaluable reference for practicing structural engineers and researchers. For generations of engineers and architects, the Guide has served as the definitive work on designing steel and aluminum structures for stability. Under the editorship of Ronald Ziemian and written by SSRC task group members who are leading experts in structural stability theory and research, this Sixth Edition brings this foundational work in line with current practice and research. The Sixth Edition incorporates a decade of progress in the field since the previous edition, with new features including: Updated chapters on beams, beam-columns, bracing, plates, box girders, and curved girders. Significantly revised chapters on columns, plates, composite columns and structural systems, frame stability, and arches Fully rewritten chapters on thin-walled (cold-formed) metal structural members, stability under seismic loading, and stability analysis by finite element methods State-of-the-art coverage of many topics such as shear walls, concrete filled tubes, direct strength member design method, behavior of arches, direct analysis method, structural integrity and disproportionate collapse resistance, and inelastic seismic performance and design recommendations for various moment-resistant and braced steel frames Complete with over 350 illustrations, plus references and technical memoranda, the Guide to Stability Design Criteria for Metal Structures, Sixth Edition offers detailed guidance and background on design specifications, codes, and standards worldwide.
Download or read book An Investigation of the Creep Buckling Behavior of Columns written by George Gerard and published by . This book was released on 1962 with total page 28 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 The Behaviour of Steel Columns in Fire Material written by Diego Somaini and published by . This book was released on 2012 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fire Safety Science written by Geoffrey Cox and published by Taylor & Francis. This book was released on 1991 with total page 1036 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Third International Symposium on Fire Safety Science, University of Edinburgh, Scotland, UK, 8-12 July 1991.
Download or read book Investigation of the Creep Buckling Behavior of Columns written by Ralph Pairno and published by . This book was released on 1960 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Behaviour of Steel Columns in Fire written by Jacqueline Claudia Pauli and published by . This book was released on 2012 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of the Creep Buckling Behavior of Columns written by Donn W. Duffey and published by . This book was released on 1963 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of the Creep Buckling Behavior of Columns written by Ralph Papirno and published by . This book was released on 1960 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 A Summary of Compressive creep Characteristics of Metal Columns at Elevated Temperatures written by R. L. Carlson and published by . This book was released on 1958 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
