Download or read book Fire Design of Concrete Filled Steel Tube Continuous Column Subjected to Concentric Or Eccentric Axial Loading written by Kingsley Ukanwa and published by . This book was released on 2017 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design recommendations for concrete filled steel tubular (CFST) columns in fire are based on the results of experimental standard fire testing of CFST members where the same temperature is applied to the column over the full column height. However, this is not representative of a CFST column in a typical building especially in seismically active countries, which is continuous between floors and which, in fire, is subjected to severe fire conditions on one floor at a time while the floors above and below remain cooler. In the experimental tests described in this thesis, the columns are of 3.2 m height with the fire applied only to the central 2 m. The tests covered three different types of infill; plain concrete, bar reinforced concrete and steel fibre reinforced concrete, with the columns subjected to compressive load levels ranging from 0.33 to 0.41. End restraint conditions of fixed-fixed (F-F) and pinned-fixed (P-F)) are considered at the ends of the 3.2m length of column . The results show that the significant initial longitudinal expansion of the steel tube relative to the concrete reported by many researchers did not occur, due to the restraining effect of the unheated column between the furnace and the end supports (bottom 500 mm and top 700 mm). The use of steel fibre reinforced concrete or bar reinforced concrete increases the axial capacity of the column when loaded concentrically or eccentrically when compared to steel tubes filled with only plain concrete. This occurs due to an increase in the tensile strength of the concrete cores by the addition of steel reinforcement (bar reinforcement or steel fibre) to the concrete core which reduces the spalling of the concrete core at elevated temperatures. A design procedure to calculate the axial capacity of a CFST column in fire is presented and validated against over 238 laboratory experiments carried out over the last 36 years on CFST columns in fire by various researchers including research carried out by the author. The proposed design procedure is shown to be more accurate when compared to other design equations presented in the literature. More importantly, the proposed design procedure includes the design of the axial capacity of steel tube columns filled with steel fibre reinforced concrete, which has been covered by only a few researchers and which is becoming increasingly popular. The proposed design procedure has been used for the design of Auckland International Airport Phase 4 Pier B Extension concrete filled columns and brief details of which are presented in section 8 of this thesis.

Download or read book Concrete Filled Stainless Steel Tubular Columns written by Vipulkumar Patel and published by CRC Press. This book was released on 2018-12-07 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete-filled stainless steel tubular (CFSST) columns are increasingly used in modern composite construction due to their high strength, high ductility, high corrosion resistance, high durability and aesthetics and ease of maintenance. Thin-walled CFSST columns are characterized by the different strain-hardening behavior of stainless steel in tension and in compression, local buckling of stainless steel tubes and concrete confinement. Design codes and numerical models often overestimate or underestimate the ultimate strengths of CFSST columns. This book presents accurate and efficient computational models for the nonlinear inelastic analysis and design of CFSST short and slender columns under axial load and biaxial bending. The effects of different strain-hardening characteristics of stainless steel in tension and in compression, progressive local and post-local buckling of stainless steel tubes and concrete confinement are taken into account in the computational models. The numerical models simulate the axial load-strain behavior, moment-curvature curves, axial load-deflection responses and axial load-moment strength interaction diagrams of CFSST columns. The book describes the mathematical formulations, computational procedures and model verifications for circular and rectangular CFSST short and slender columns. The behavior of CFSST columns under various loading conditions is demonstrated by numerous numerical examples. This book is written for practising structural and civil engineers, academic researchers and graduate students in civil engineering who are interested in the latest computational techniques and design methods for CFSST columns.

Download or read book Concrete Filled Double Skin Steel Tubular Column with Hybrid Fibre Reinforced Polymer written by Kok Keong Choong and published by Springer Nature. This book was released on 2021-07-06 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the residual strength of the CFDST column, that can be used to determine the most suitable repair method in order to retrofit the column. The book elaborates on the behavior of CFDST column after being exposed to fire. This book also discusses the effectiveness of repair method using single and Hybrid Fibre Reinforced Polymer (FRP) of fire-damaged CFDST columns. It concludes by taking a look at different parameters such as thickness of outer steel tube and fire exposure time as factors affecting thermal properties/stability.

Download or read book Current Perspectives and New Directions in Mechanics Modelling and Design of Structural Systems written by Alphose Zingoni and published by CRC Press. This book was released on 2022-09-05 with total page 749 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems comprises 330 papers that were presented at the Eighth International Conference on Structural Engineering, Mechanics and Computation (SEMC 2022, Cape Town, South Africa, 5-7 September 2022). The topics featured may be clustered into six broad categories that span the themes of mechanics, modelling and engineering design: (i) mechanics of materials (elasticity, plasticity, porous media, fracture, fatigue, damage, delamination, viscosity, creep, shrinkage, etc); (ii) mechanics of structures (dynamics, vibration, seismic response, soil-structure interaction, fluid-structure interaction, response to blast and impact, response to fire, structural stability, buckling, collapse behaviour); (iii) numerical modelling and experimental testing (numerical methods, simulation techniques, multi-scale modelling, computational modelling, laboratory testing, field testing, experimental measurements); (iv) design in traditional engineering materials (steel, concrete, steel-concrete composite, aluminium, masonry, timber); (v) innovative concepts, sustainable engineering and special structures (nanostructures, adaptive structures, smart structures, composite structures, glass structures, bio-inspired structures, shells, membranes, space structures, lightweight structures, etc); (vi) the engineering process and life-cycle considerations (conceptualisation, planning, analysis, design, optimization, construction, assembly, manufacture, maintenance, monitoring, assessment, repair, strengthening, retrofitting, decommissioning). Two versions of the papers are available: full papers of length 6 pages are included in an e-book, while short papers of length 2 pages, intended to be concise but self-contained summaries of the full papers, are in this printed book. This work will be of interest to civil, structural, mechanical, marine and aerospace engineers, as well as planners and architects.

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 A Study of the Behaviour of Short Concrete filled Steel Column Under Continuous Axial Loading written by Fong Hon Ho and published by . This book was released on 1997 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fire Design of Steel Structures written by Jean-Marc Franssen and published by John Wiley & Sons. This book was released on 2016-10-10 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explains and illustrates the rules that are given in the Eurocodes for designing steel structures subjected to fire. After the first introductory chapter, Chapter 2 explains how to calculate the mechanical actions (loads) in the fire situation based on the information given in EN 1990 and EN 1991. Chapter 3 is dedicated to the models which represent the thermal actions created by the fire. Chapter 4 describes the procedures to be used to calculate the temperature of the steelwork from the temperature of the compartment and Chapter 5 shows how the information given in EN 1993-1-2 is used to determine the load bearing capacity of the steel structure. Chapter 6 presents the essential features that characterize the advanced calculation models, for thermal and mechanical response. The methods used to evaluate the fire resistance of bolted and welded connections are described in Chapter 7. Chapter 8 describes a computer program called `Elefir-EN? which is based on the simple calculation model given in the Eurocode and allows designers to quickly and accurately calculate the performance of steel components in the fire situation. Chapter 9 looks at the issues that a designer may be faced with when assessing the fire resistance of a complete building. This is done via a case study and addresses most of the concepts presented in the previous chapters. For this second edition the content has been revised and extended. The book contains some new sections, e.g. a comparison between the simple and the advanced calculation, as well as additional examples.

Download or read book Fire Behaviour of Self consolidating Concrete filled Double Skin Steel Tubular Columns written by Hui Lu and published by . This book was released on 2010 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: The concrete-filled double skin tubular column (CFDST) is an innovative type of steel-concrete element which has potential for use as piers in bridges and columns in buildings. The use of self-compacting concrete (SCC) in CFDST is seen as a solution to resolve the challenge of concrete compaction in the columns. The behaviour of CFDST under static and cyclic loading at ambient temperature has been extensively studied. The fire performance of CFDST is crucial due to the direct fire exposure of the outer steel tube. Nevertheless, there is at present little information about the fire performance of CFDST. This thesis reports on research into the fire performance of SCC-filled CFDST columns. The research aims to understand the fundamental behaviour of SCC-filled CFDST columns under standard fire exposure by means of standard fire tests and finite element modelling and to develop guidance for fire resistance design of the columns.Given the complexity in the responses of SCC-filled CFDST in fires, SCC-filled steel tubular stub columns (CFST), a specific type of CFDST without an inner steel tube, were selected for study in the first phase of the research program because of their simple configuration. Six SCC-filled CFST stub columns were prepared for standard fire tests and a finite element model to simulate the thermal and structural responses was developed. The main purpose of this phase of research was to develop a methodology for the further study of fire behaviour of CDFST columns by investigating how SCC affects the fire behaviour of composite columns and how steel tube affords confinement of the SCC to alter its behaviour at elevated temperature.A series of standard fire tests for CFDST columns was conducted in the second phase of the research. Six CFDST columns and sixteen CFDST stub columns were prepared for standard fire tests. A further two CFDST stub columns were prepared as reference specimens to test the axial capacity at ambient temperature. The columns and stub columns in the tests represent slender and stub columns in authentic engineering practice in which the failure modes are buckling and compression failure respectively. Data obtained from the fire tests, i.e. temperatures, axial deformation, failure modes and fire resistance, were used to investigate the fire behaviour of the columns. Interaction among the three components in the columns during fire exposure was clearly shown in the tests. Such interaction is beneficial to the fire performance of CFDST columns. Confinement of the tubes on the SCC prevents its spalling. Components which help each other through a load transfer mechanism are typical of the composite interaction in CFDST columns. Methods to enhance the fire resistance performance of CFDST, i.e. fire protection and steel fibre reinforced concrete, were also validated in the tests. In addition, the fire tests accumulated data to verify the numerical model in the subsequent research.A finite element model was developed and used to study in detail the fire behaviour of CFDST columns and for the parametric study in the third phase of the research. An advanced finite element model which accounts for material and geometric non-linearity and the interaction of tubes and concrete was proposed to simulate the thermal and structural responses of CFDST columns under standard fire exposure. A concrete material model for confined concrete in CFDST at elevated temperature was developed accordingly. The model was then used to analyse the fire behaviour of the columns in terms of stress, strain and load share in components which cannot be obtained directly from fire tests. Yield of the inner steel tube was found to be a major cause of the final failure of the columns. The influence of a number of parameters on the fire resistance performance of the columns was investigated. The parameters which have significant influence on the fire resistance performance of the columns were identified. Finally, guidelines for the fire resistance design of CFDST columns are proposed. These guidelines deal with how to appropriately select parameters for CFDST columns to ensure the columns achieve the anticipated fire resistance. Several practical design tables are also presented to illustrate how to use the guidelines to design CFDST columns to achieve a certain level of fire resistance.

Download or read book Behavior of High Strength Concrete Filled Circular Steel Tube Beam columns written by Farid Alfawakhiri and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Behavior of Concrete filled Steel Tubular Short Columns Subjected to Axial Compression written by Masakazu Masada and published by . This book was released on 1990 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Textile Fibre Composites in Civil Engineering written by Thanasis Triantafillou and published by Woodhead Publishing. This book was released on 2016-02-08 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Textile Fibre Composites in Civil Engineering provides a state-of-the-art review from leading experts on recent developments, the use of textile fiber composites in civil engineering, and a focus on both new and existing structures. Textile-based composites are new materials for civil engineers. Recent developments have demonstrated their potential in the prefabrication of concrete structures and as a tool for both strengthening and seismic retrofitting of existing concrete and masonry structures, including those of a historical value. The book reviews materials, production technologies, fundamental properties, testing, design aspects, applications, and directions for future research and developments. Following the opening introductory chapter, Part One covers materials, production technologies, and the manufacturing of textile fiber composites for structural and civil engineering. Part Two moves on to review testing, mechanical behavior, and durability aspects of textile fiber composites used in structural and civil engineering. Chapters here cover topics such as the durability of structural elements and bond aspects in textile fiber composites. Part Three analyzes the structural behavior and design of textile reinforced concrete. This section includes a number of case studies providing thorough coverage of the topic. The final section of the volume details the strengthening and seismic retrofitting of existing structures. Chapters investigate concrete and masonry structures, in addition to providing information and insights on future directions in the field. The book is a key volume for researchers, academics, practitioners, and students working in civil and structural engineering and those working with advanced construction materials. Details the range of materials and production technologies used in textile fiber composites Analyzes the durability of textile fiber composites, including case studies into the structural behavior of textile reinforced concrete Reviews the processes involved in strengthening existing concrete structures

Download or read book Design of High Strength Steel Reinforced Concrete Columns written by Sing-Ping Chiew and published by CRC Press. This book was released on 2018-04-17 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the companion volume to Design Examples for High Strength Steel Reinforced Concrete Columns – A Eurocode 4 Approach. Guidance is much needed on the design of high strength steel reinforced concrete (SRC) columns beyond the remit of Eurocode 4. Given the much narrower range of permitted concrete and steel material strengths in comparison to EC2 and EC3, and the better ductility and buckling resistance of SRC columns compared to steel or reinforced concrete, there is a clear need for design beyond the guidelines. This book looks at the design of SRC columns using high strength concrete, high strength structural steel and high strength reinforcing steel materials – columns with concrete cylinder strength up to 90 N/mm2, yield strength of structural steel up to 690 N/mm2 and yield strength of reinforcing steel up to 600 N/mm2 respectively. The companion volume provides detailed worked examples on use of these high strength materials. This book is written primarily for structural engineers and designers who are familiar with basic EC4 design, and should also be useful to civil engineering undergraduate and graduate students who are studying composite steel concrete design and construction. Equations for design resistances are presented clearly so that they can be easily programmed into design spreadsheets for ease of use.

Download or read book Analysis of Steel reinforced Concrete filled Steel Tube Columns CFT Under Axial Compression and Moment written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study presents an investigation into the behavior of steel-reinforced concrete filled steel tubular columns (CFT) using the finite element software ABAQUS. The steel tube provides lateral confinement to the concrete core which results in an increased concrete compressive strength and deformation capacity. The concrete infill, in return, prevents the inward local buckling within steel tubes. The axial load bearing capacity of CFT is thus higher than the summation of axial load-bearing capacities of the concrete core and the hollow steel tube. The axial force P and moment M interaction diagram is generated.

Download or read book Dynamic Analysis of Steel Confined Concrete Tubular Columns Against Blast Loads written by Fangrui Zhang and published by . This book was released on 2017 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of composite construction has drawn more and more attention in recent decades. This thesis contains a number of journal articles which aim to enrich the knowledge of the performance of concrete filled tubular columns when subjected to blast loading. Experimental investigations are used in conjunction with numerical analysis to provide a thorough assessment of the blast-resistance of concrete filled tubular columns. The first chapter mainly focuses on the experimental study on concrete filled tubular columns under blast loading. A large-scale blast experimental program is carried out on concrete filled double-skin steel tube (CFDST) columns. The blast experiment aims to examine the blast-resistance of ten CFDST specimens, including five with square cross-section and the other five with circular cross-section. The parameters that are investigated during the blast experiment include: cross-sectional geometry, explosive charge weight and magnitude of axial load. After the experiment, several damaged test specimens are then transported back to the laboratory for residual axial load-carrying capacity tests. The proposed CFDST columns are able to retain more than 60% of its axial load-carrying capacity even after being subjected to close-range explosion. As blast experiments are often costly and associated with potential safety concerns, numerical tools have been adopted by more and more researchers. In the second chapter of the thesis, numerical approaches in modelling the dynamic behaviour of concrete filled steel tube (CFST) columns and CFDST columns under blast loading are presented. The numerical models are validated against the results of the blast experiment as described in the first chapter and good agreement is achieved. Parametric studies on the effect of column dimensions and material properties are also discussed through intensive numerical simulations. In the last chapter, a numerical method to generate pressure-impulse diagrams for CFDST columns is proposed which uses a damage criterion involving the residual axial load-carrying capacity. Based on the numerical method, pressure-impulse diagrams for different column configurations are derived and analytical expressions of deriving pressure-impulse diagrams for CFDST columns are also developed through regression analysis.

Download or read book Structural Fire Engineering written by Venkatesh Kodur and published by McGraw Hill Professional. This book was released on 2020-02-28 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: Actionable strategies for the design and construction of fire-resistant structures This hands-on guide clearly explains the complex building codes and standards that relate to fire design and presents hands-on techniques engineers can apply to prevent or mitigate the effects of fire in structures. Dedicated chapters discuss specific procedures for steel, concrete, and timber buildings. You will get step-by-step guidance on how to evaluate fire resistance using both testing and calculation methods. Structural Fire Engineering begins with an introduction to the behavioral aspects of fire and explains how structural materials react when exposed to elevated temperatures. From there, the book discusses the fire design aspects of key codes and standards, such as the International Building Code, the International Fire Code, and the NFPA Fire Code. Advanced topics are covered in complete detail, including residual capacity evaluation of fire damaged structures and fire design for bridges and tunnels. Explains the fire design requirements of the IBC, IFC, the NFPA Fire Code, and National Building Code of Canada Presents design strategies for steel, concrete, and timber structures as well as for bridges and tunnels Contains downloadable spreadsheets and problems along with solutions for instructors

Download or read book Behaviour of Concrete Filled Steel Tubular Columns Subjected to Variable Repeated Loading written by Parathidevi Thayalan and published by . This book was released on 2000 with total page 1020 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Interaction of Steel Tube and Concrete Core in Concrete Filled Steel Tube Columns written by Nabil Falah and published by . This book was released on 2010 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt: