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, or have design guideline of Wrap-Around Gusset plate for horizontal bracing with large cutout please share
Design of wrap around steel gusset plates
by Dowswell, Ronald Scott, PhD, THE UNIVERSITY OF ALABAMA AT BIRMINGHAM, 2005, 0 pages; 3201151
Abstract: Gusset plates are used in steel buildings to connect bracing members to other structural members in the lateral force resisting system. Horizontal bracing is commonly used to resist lateral loads in industrial structures and in commercial buildings where floor and roof diaphragms cannot carry the loads. Wrap-around gusset plates are L-shaped plates that are used where an opening is required at the corner of the plate. This typically occurs at horizontal bracing where the gusset plate is cut out around a column. The purposes of this research were to gain a better understanding of the behavior of wrap-around gusset plates, identify potential failure modes, and formulate a design method for these connections. Ten experimental specimens were tested in compression and five were tested in tension. All of the specimens were modeled using the finite element method with material and geometric nonlinearities. The experiments and finite element models indicated that wrap-around gusset plates are subject to limit states common to flexural members. The results were used to formulate a design method for wrap-around gusset plates, which is based on a cantilever beam model. The accuracy of the proposed design method was verified by comparing the calculated capacities to experimental and finite element results. The accuracy of the proposed method is similar to that of the current design procedure for standard gusset plates without cutouts.
Anyone can downlaod this for me from ASCE site
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Finite Element Modeling of Wrap-Around Gusset Plates in Tension by Bo Dowswell, Robert Whyte, Jim Davidson, and Fouad Fouad
Document type: Conference Proceeding Paper
Part of: 2006 Structural Engineering and Public Safety
Abstract: Gusset plates are used in steel buildings to connect bracing members to other structural members in the lateral force resisting system. Horizontal bracing is commonly used to resist lateral loads in industrial structures and in commercial buildings where floor and roof diaphragms cannot carry the loads. Wrap-around gusset plates are L-shaped plates that are used where an opening is required at the comer of the plate. This typically occurs at horizontal bracing where the gusset plate is cut out around a column. Finite element models were used to determine the behavior of wrap-around gusset plates. The plates were modeled using material and geometric nonlinearities. Five different gusset plates were modeled with geometry and material properties matching the experimental specimens of Dowswell. All of the models were loaded in tension. The loads from the finite element models were compared to the experimental loads.
Geopolymers: Structures, Pricessing, Properties and Industrial Applications
Author: Edited by J L Provis and J S J van Deventer | Size: 18.15 MB | Format:PDF | Publisher: Woodhead Publishing Ltd | Year: 2009 | pages: 464
Edited by J L Provis and J S J van Deventer, University of Melbourne, Australia
- discusses the synthesis and characterisation of geopolymers with chapters covering fly ash chemistry and inorganic polymer cements
- assesses the application and commercialisation of geopolymers with particular focus on applications in waste management
- reviews the latest research on and applications of these highly important materials
A geopolymer is a solid aluminosilicate material usually formed by alkali hydroxide or alkali silicate activation of a solid precursor such as coal fly ash, calcined clay and/or metallurgical slag. Today the primary application of geopolymer technology is in the development of reduced-CO2 construction materials as an alternative to Portland-based cements. Geopolymers: structure, processing, properties and industrial applications reviews the latest research on and applications of these highly important materials.
Part one discusses the synthesis and characterisation of geopolymers with chapters on topics such as fly ash chemistry and inorganic polymer cements, geopolymer precursor design, nanostructure/microstructure of metakaolin and fly ash geopolymers, and geopolymer synthesis kinetics. Part two reviews the manufacture and properties of geopolymers including accelerated ageing of geopolymers, chemical durability, engineering properties of geopolymer concrete, producing fire and heat-resistant geopolymers, utilisation of mining wastes and thermal properties of geopolymers. Part three covers applications of geopolymers with coverage of topics such as commercialisation of geopolymers for construction, as well as applications in waste management.
With its distinguished editors and international team of contributors, Geopolymers: structure, processing, properties and industrial applications is a standard reference for scientists and engineers in industry and the academic sector, including practitioners in the cement and concrete industry as well as those involved in waste reduction and disposal.
DIRECT LINKS
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EN 13481-1:2002 Railway applications - Track - Performance requirements for fastening systems - Part 1: Definitions, and its amendmend EN 13481-1:2002/A1:2006
EN 13481-2:2002 Railway applications - Track - Performance requirements for fastening systems - Part 2: Fastening systems for concrete sleepers, and its amendmend EN 13481-2:2002/A1:2006
EN 13481-3:2002 Railway applications - Track - Performance requirements for fastening systems - Part 3: Fastening systems for wood sleepers, and EN 13481-3:2002/A1:2006
EN 13481-5:2002 Railway applications - Track - Performance requirements for fastening systems - Part 5: Fastening systems for slab track, and EN 13481-5:2002/A1:2006
EN 13481-8:2006 Railway applications - Track - Performance requirements for fastening systems - Part 8: Fastening systems for track with heavy axle loads
To determine most exactly the carrying capacity of a structure or a structural element has always been a major concern to any design engineer. For safety sensitive structures this implies not only situations of normal service conditions but also states near to failure or post-critical states in order to better prevent accidents by appropriate design. Among the rational design tools available to engineers, for this purpose the so-called "direct methods", embracing in particular limit- and shakedown analysis, have always been particularly attractive due to the fact that they allow to determine in a constructive way directly the limit loads of a structure. This holds true for simple loading by proportionally applied mechanical and thermal loads, but also for the more complicated situation of variable loading even in the case when the loading history is not deterministically given.
The tremendous progress in computation over the last years has contributed very largely to the development of direct methods. They have left the realm of ad-hoc computing and can be used today for post-processing in combination with commercial design tools.
Far from being comprehensive, given this very active field of scientific research and development, the papers presented in this book give an account of some of the most advanced results achieved over the last years by leading scientists in the field. This way, the book is meant to help the practical engineer to choose the right tool for his safety analysis of critical structures and to stimulate researchers to enter this most interesting field, reaching from highly abstract concepts up to the essential questions of practical engineering.
Content Level » Research
Keywords » direct methods - mechanical and civil engineering - safety - structural design
TABLE OF CONTENTS
Large problems in numerical Limit Analysis: a decomposition approach, by F. Pastor, Z. Kammoun, E. Loute, J. Pastor and H. Smaoui; Gurson model for porous pressure sensitive materials, by J. Pastor and P. Thore; A Direct Method for the determination of effective strength domains for periodic elastic-plastic media, by S. Bourgeois, H. Magoariec and O. Debordes; Stochastic limit load analysis of elasto-plastic plane frames, by K. Marti; Limit load analysis of plane frames under stochastic uncertainty , by S. Zier and K. Marti; Static shakedown theorem for solids with temperature-dependent elastic modulus, by A. Oueslati and G. de Saxce; On shakedown of structures under variable loads with a kinematic non-linear and non-associated hardening rule, by C. Bouby, G. de Saxce and J.-B. Tritsch; Limit Analysis of orthotropic Laminates by Linear Matching Method, by P. Fuschi, A. A. Pisano, and O. Barrera
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This book aims to provide a unified methodology to derive models for fatigue life prediction. This includes S-N, e-N and crack propagation models. This book is unique in that it contemplates the three main fatigue approaches (stress-based, strain-based and fracture mechanics) from a novel and integrated point of view. As an alternative to the preferential attention paid to deterministic models based on the physical, phenomenological and empirical description of fatigue, their probabilistic nature is emphasized in this book, in which stochastic fatigue and crack growth models are presented.
After an introductory chapter in which an overview of the book is provided, the following chapters are devoted to derive models for the S-N fields for fixed and varying stress level, the e-N fields, the relations between the two, and an analysis of the size effect in fatigue problems. Next, crack grow models are derived based on fracture mechanics, statistical and common sense considerations, which lead to functional equations providing non-arbitrary models. Two different approaches are given, leading to two classes of models, the intersection class of which is derived through compatibility analysis. Then the compatibility of the S-N curves model and the crack growth model, which are two aspects of the same fatigue problem, are used to obtain a model which allows both approaches to be connected. Finally, the problem of selection damage measures is analyzed, and some damage measures are proposed as the most convenient, including the probability of failure and a normalized measure related to the percentile curve. This leads to very simple and useful damage accumulation models, which are illustrated with some examples.
The book ends with an appendix with a short description of some classical and some more recent fatigue models of those existing in the literature.
Related subjects » Materials - Mechanical Engineering - Mechanics - Physical & Information Science - Production & Process Engineering
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