Author: Publisher: ISBN: Category : Languages : en Pages : 37
Book Description
Protection against blast loads has become a high priority for many government agencies. Blast retrofitting and structural hardening, much like earthquake retrofits, can prove to be costly. For this reason, it is important to understand that any structural element has an inherent capacity to absorb energy and provide some level of protection. An evaluation of an existing structure may allow a designer to utilize the full absorption capacity of a structural element, precluding the need for a blast-specific retrofit. To illustrate this concept, the blast resistances of non-load bearing precast/prestressed or tilt-up concrete sandwich wall panels (WP) are examined. These components are used extensively in modern construction for cladding of framed building systems and often provide a significant level of protection from blast events.
Author: Alexandar J. Mlynarczyk Publisher: ISBN: Category : Concrete walls Languages : en Pages : 129
Book Description
Abstract: "To ensure sufficient composite action to meet structural strength and stiffness requirements in precast concrete sandwich wall panels, the designer must provide adequate shear transfer between concrete wythes. In a typical sandwich panel, shear transfer may be provided through several different mechanisms. These mechanisms include: (1) solid concrete regions; (2) mechanical connectors that pass through the insulation wythe; and, (3) bond between the concrete wythes and the insulation. The objective to the work presented in this report is to investigate the flexural behavior of sandwich panels and the contribution to composite action provided by regions of solid concrete, wythe connectors, and bond. Tests were performed on four full-scale precast sandwich wall panels. A Prototype panel was tested, which included regions of solid concrete in the insulation wythe, metal wythe connectors, and no attempt was made to disrupt the bond between the concrete wythes and the insulation wythe. The degree of composite action developed by each of the different shear transfer mechanisms was then evaluated by testing three additional panels that included only one mechanism of shear transfer (solid concrete, wythe connectors, or bond). It was found that, for the panel geometries and materials treated in this study, the solid concrete regions provide most of the strength and stiffness that contribute to composite behavior. Steel M-tie connectors and bond between the insulation and concrete contribute relatively little to composite behavior. Therefore, for design purposes, it is recommended that solid concrete regions be proportioned to provide all of the required composite action in a precast sandwich wall panel. A precast concrete sandwich wall panel constructed similarly to the Prototype panel treated in this study will behave as a fully composite panel in terms of service load-deflection behavior and flexural strength."
Author: fib Fédération internationale du béton Publisher: FIB - Féd. Int. du Béton ISBN: 2883941246 Category : Technology & Engineering Languages : en Pages : 146
Book Description
During the mid-20th century, with the rise of industrial prefabrication, precast concrete sandwich panels started being used as cladding for buildings. Since then, society and construction industry have become increasingly aware of energy efficiency in all fields, including affordability and sustainability consciousness, while maintaining the buildings’ durability. As such, buildings have been subject to increasingly stringent requirements which has kept the technology of sandwich panels continually at the forefront of building envelope evolution. Nowadays, sandwich panels have reached the highest standards of functional performance and aesthetic appeal. In building construction, these sandwich panel attributes combine with the well-known advantages of prefabrication including structural efficiency, flexibility in use, speed of construction, quality consciousness, durability, and sustainability. Sandwich panels have gained more exposure, thus representing quite a significant application within the prefabrication industry and a vital component of the precast market. The fib Commission “Prefabrication” is eager to promote the development of all precast structural concrete products and to share the knowledge and experience gained, to aid with practical design and construction. By issuing this comprehensive overview, “Guide to Good Practice”, a better understanding of design considerations, structural analysis, building physics, use of materials, manufacturing methods, equipment usage and field performance will be provided. This document contains the latest information currently available worldwide. The Commission is particularly proud that this document is a result of close cooperation with PCI and that it is published by both the fib and PCI. This cooperation started six years ago, first with comparing the different approaches to several issues, then progressively integrating and producing common documents, like this one, that hasn’t yet been treated in a specific Guide by either body. This Guide is intended to be the reference document to all who are interested in utilising the advantages of Precast Sandwich wall panels. In conjunction with the previously published Planning and Design Handbook on Precast Building Structures, the designer will have significant resources to integrate sandwich wall panels into any applicable structure.
Author: Publisher: ISBN: Category : Languages : en Pages : 21
Book Description
Insulated precast concrete sandwich wall panels are commonly used for exterior cladding on building structures. The insulation is sandwiched between exterior and interior concrete layers to reduce the heating and cooling costs for the structure. The panels can be designed as composite, partially composite, or non-composite. Shear ties are used to achieve these varying degrees of composite action between the interior and exterior concrete layers. A variety of shear ties are available for domestic construction. An experimental study was conducted to assess the relative strength and response of these commercially available ties. Fourteen shear ties were examined, the failure modes and responses were quantified, and simplified engineer level multi-linear strength curves were developed for each connection. The results indicate that shear ties used in sandwich wall panels have considerable variation in strength, stiffness, and deformability. The maximum shear strength of the discrete ties averaged 10.5 kN (2357 lb) with a minimum of 5.52 kN (1241 lb) and maximum of 18.4 kN (4138 lb). The ties exhibited elastic-brittle, elastic-plastic, plastic-hardening, and a variety of other responses. The results were used to develop tri-linear constitutive relationships, which were used to approximate the flexural response of sandwich wall panels.
Author: Guo Hui Yang Publisher: Trans Tech Publications Ltd ISBN: 3038260002 Category : Technology & Engineering Languages : en Pages : 700
Book Description
Selected, peer reviewed papers from the 2012 International Conference on Materials and Manufacturing Research (ICMMR 2012), December 1-2, 2012, Manila, Philippines
Author: Lieping Ye Publisher: Springer Science & Business Media ISBN: 3642174876 Category : Technology & Engineering Languages : en Pages : 956
Book Description
"Advances in FRP Composites in Civil Engineering" contains the papers presented at the 5th International Conference on Fiber Reinforced Polymer (FRP) Composites in Civil Engineering in 2010, which is an official conference of the International Institute for FRP in Construction (IIFC). The book includes 7 keynote papers which are presented by top professors and engineers in the world and 203 papers covering a wide spectrum of topics. These important papers not only demonstrate the recent advances in the application of FRP composites in civil engineering, but also point to future research endeavors in this exciting area. Researchers and professionals in the field of civil engineering will find this book is exceedingly valuable. Prof. Lieping Ye and Dr. Peng Feng both work at the Department of Civil Engineering, Tsinghua University, China. Qingrui Yue is a Professor at China Metallurgical Group Corporation.
Author: Nasim Uddin Publisher: Elsevier ISBN: 0857098950 Category : Technology & Engineering Languages : en Pages : 565
Book Description
The use of fiber-reinforced polymer (FRP) composite materials has had a dramatic impact on civil engineering techniques over the past three decades. FRPs are an ideal material for structural applications where high strength-to-weight and stiffness-to-weight ratios are required. Developments in fiber-reinforced polymer (FRP) composites for civil engineering outlines the latest developments in fiber-reinforced polymer (FRP) composites and their applications in civil engineering.Part one outlines the general developments of fiber-reinforced polymer (FRP) use, reviewing recent advancements in the design and processing techniques of composite materials. Part two outlines particular types of fiber-reinforced polymers and covers their use in a wide range of civil engineering and structural applications, including their use in disaster-resistant buildings, strengthening steel structures and bridge superstructures.With its distinguished editor and international team of contributors, Developments in fiber-reinforced polymer (FRP) composites for civil engineering is an essential text for researchers and engineers in the field of civil engineering and industries such as bridge and building construction. - Outlines the latest developments in fiber-reinforced polymer composites and their applications in civil engineering - Reviews recent advancements in the design and processing techniques of composite materials - Covers the use of particular types of fiber-reinforced polymers in a wide range of civil engineering and structural applications
Author: Giuseppe Carlo Marano Publisher: Springer Nature ISBN: 3031120116 Category : Technology & Engineering Languages : en Pages : 1193
Book Description
This book gathers peer-reviewed contributions presented at the 3rd International Conference on Structural Engineering and Construction Management (SECON’22), held in Angamaly, Kerala, India, on 1-3 June 2022. 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.
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Author: Alexandar J. Mlynarczyk
Author: fib Fédération internationale du béton
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Author: Guo Hui Yang
Author: Lieping Ye
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Author: Nasim Uddin
Author: Giuseppe Carlo Marano
Author: Gerald R. Frederick