Download or read book Load bearing behavior and design of anchorages subjected to shear and torsion loading in uncracked concrete written by Philipp R. Grosser and published by . This book was released on 2012 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fibre Reinforced Concrete Improvements and Innovations written by Pedro Serna and published by Springer Nature. This book was released on 2020-11-05 with total page 1180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume highlights the latest advances, innovations, and applications in the field of fibre reinforced concrete (FRC) and discusses a diverse range of topics concerning FRC: rheology and early-age properties, mechanical properties, codes and standards, long-term properties, durability, analytical and numerical models, quality control, structural and Industrial applications, smart FRC’s, nanotechnologies related to FRC, textile reinforced concrete, structural design and UHPFRC. The contributions present improved traditional and new ideas that will open novel research directions and foster multidisciplinary collaboration between different specialists. Although the symposium was postponed, the book gathers peer-reviewed papers selected in 2020 for the RILEM-fib International Symposium on Fibre Reinforced Concrete (BEFIB).
Download or read book Proceedings of the Canadian Society of Civil Engineering Annual Conference 2022 written by Rishi Gupta and published by Springer Nature. This book was released on 2023-08-05 with total page 1180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprises the proceedings of the Annual Conference of the Canadian Society of Civil Engineering 2022. The contents of this volume focus on specialty conferences in construction, environmental, hydrotechnical, materials, structures, transportation engineering, etc. This volume will prove a valuable resource for those in academia and industry.
Download or read book Anchorage in Concrete Construction written by Rolf Eligehausen and published by John Wiley & Sons. This book was released on 2013-10-30 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Das Buch stellt den aktuellen Stand der kompletten Befestigungstechnik für Beton und Mauerwerk mit Einlegeteilen (Ankerschienen, Kopfbolzen), Dübeln (Metallspreizdübel, Hinterschnittdübel, Verbunddübel, Betonschrauben, Kunststoffdübel) und Setzbolzen umfassend dar. Die Befestigungselemente und ihre Wirkungsmechanismen werden ausführlich beschrieben und das Tragverhalten im ungerissenen und gerissenen Beton untersucht. Weiterhin werden das Korrosionsverhalten, das Verhalten bei Brandbeanspruchung sowie bei Erdbeben- und Schockbeanspruchung behandelt. Von besonderer internationaler Aktualität ist die Bemessung gemäß der europäischen und amerikanischen Normung. Praxisorientierte Kriterien zur Auswahl von Befestigungsmitteln und Bemessungsbeispiele runden das Werk zu einem einzigartigen Handbuch ab.
Download or read book Design of anchorages in concrete written by fib Fédération internationale du béton and published by fib Fédération internationale du béton. This book was released on 2011-01-01 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite the widespread use of cast-in-place and post-installed anchors in construction, the overall level of understanding in the engineering community regarding their behaviour remains quite limited. Furthermore, since the publication of the original CEB design guide, “Design of Fastenings in Concrete”, ongoing research and additional application experience has led to an improved understanding and deepened knowledge in various areas of fastening technology. fib Bulletin 58 therefore represents a substantial revision of the original 1997 guide. It addresses a variety of loading types and failure modes and takes into account the current state of the art for anchorages in new construction as well as for their use in the repair and strengthening of existing concrete structures. fib Bulletin 58 provides a method for the design of the anchorage and additional rules for the design of the concrete member to which the load is transferred. The specified provisions are based on the currently available research.
Download or read book Behavior of Post installed Anchors in Reinforced Concrete Shear Walls of Different Aspect Ratios Subjected to Simulated Seismic Loads written by Gloria Faraone and published by . This book was released on 2021 with total page 617 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reinforced concrete shear walls are commonly used to provide lateral strength and stiffness to concrete buildings in seismic regions. Typically installed in the wall face, mechanical anchors are responsible for connecting various nonstructural systems to the main structure. During an earthquake, anchors in reinforced concrete structural elements need to retain their strength and stiffness, despite the inevitable presence of cracks and damage in the concrete, developed as a consequence of the lateral cyclic loading. Anticipating damage to the concrete, which will naturally influence anchor response, current guidelines to qualify anchors for seismic applications require adequate performance in cracked concrete to assure minimal anchor load loss. However, these guidelines are based on anchor performance in pure flexural cracks, as this is the typical damage condition occurring in reinforced concrete frame elements, which has been studied for decades. The response of anchors to a mix of flexure and shear cracks, i.e., the complex situation realized in shear-flexure structural components such as shear walls, however, has largely not been studied. To address the paucity of data regarding anchor behavior in cracked concrete, the behavior of anchors installed horizontally in three full-scale reinforced concrete shear walls with different aspect ratios (wall height/length) is studied in this dissertation. Notably, two types of post-installed anchors were investigated in these tests, namely: i) expansion anchors and ii) bonded anchors. One slender and two identical low-aspect ratio walls were designed according to current U.S. design codes. Simulated seismic loading was imposed at the top of the wall using an equivalent cyclic displacement history, while uniform compression was applied on the slender and one of the two identical low-aspect ratio shear walls. One of the low aspect ratio walls was tested without axial compression to investigate its effect on the anchor response. Anchors were continuously loaded to their design tension while the walls were cycled. The slender full-scale wall failed in a predominantly flexural mode, precipitated by buckling and fracture of the boundary reinforcement. The two identical full-scale low-aspect ratio walls failed in a mixed flexure-shear response, with severe web concrete crushing and buckling and rupture of the boundary reinforcement. Anchor axial load and displacement data, continually measured during the wall cyclic tests, confirmed the sensitivity of the performance of anchors amidst the presence of a variety of cracked concrete conditions, especially in walls prone to develop large shear stress and shear induced damage when subjected to lateral cyclic loads. Following the wall cyclic tests, tension failure tests performed on the anchors indicated that their residual tension load capacity was significantly compromised by concrete damage. Such damage was concentrated in specific wall regions, such as the boundary elements and the plastic hinge region in slender walls, or along the diagonal struts, the boundary elements and near the base of low-aspect ratio walls. Of the two types of anchors tested, expansion anchors observed the most significant load loss (and consequentially axial displacement) in the presence of both the wall cyclic loading and the residual tests on the anchors themselves. Following the experimental program, a multiple vertical line finite element model was used to predict the response of each of the tested full-scale shear walls. Numerical analyses cross-comparison with test results demonstrated a high level of accuracy of the selected modeling approach. As such, an expanded parametric study was conducted to understand the extent of severe concrete strains on the crack distribution and width, using a smeared crack approach. Wall models designed for the parametric study were intended to explore different geometry, reinforcement and axial compression to study the damage distribution within the wall elevation. Crack pattern distribution plots developed using the parametric study results were used to identify regions where anchors would be vulnerable to load loss upon achievement of service, design and severe seismic damage. Ultimately, the findings from this dissertation shed light on the vulnerability of anchors placed in reinforced concrete shear walls, where damage in the form of mixed mode cracking and spalling can be expected. Future design guidelines would benefit from precluding crack sensitive anchors in the most highly damaged regions of these essential lateral force resisting components of the structural system.
Download or read book Anchors in Concrete design and Behavior written by George A. Senkiw and published by . This book was released on 1991 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Precast tunnel segments in fibre reinforced concrete written by fib Fédération Internationale du Béton and published by FIB - Féd. Int. du Béton. This book was released on 2017-08-01 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the publication of this bulletin, fib Commission 1 is initiating a new series of documents related to the use of structural concrete in underground construction, where structural concrete plays a major and increasingly important role. The usage of underground space is more than ever a key issue of urban planning and fib decided to start addressing the issues related to the design and construction of concrete structures in this particular environment. In this context one the most significant applications of structural concrete is tunnel lining, for which the properties of reinforced concrete are particularly well suited through compressive strength, water tightness, ductility, and durability. Reinforced concrete tunnels linings have mostly been traditionally cast in situ, but the development of Tunnel Boring Machines has lead to the invention of precast concrete segmental lining technology, which is nowadays one of the most promising applications of Fibre Reinforced Concrete (FRC). Thanks to the courage and dedication of innovative designers and contractors, a number of large tunnels have already been built around the World with FRC precast linings, and this report presents the experience acquired with these projects, and also provides guidance about the way to apply 2010 fib Model Code recommendations on FRC to these structures. The main drivers of this evolution from RC to FRC are a better ductility, more durability, and easier fabrication and construction process. As Commission 1 chair, I am very grateful to Alberto Meda and to all members of this task group for opening the way to this new field of underground structures within our commission, and to have efficiently produced a document that will be useful to our members and to the construction community around the World.
Download or read book Tensile and shear behavior of anchors in uncracked and cracked concrete under static and dynamic loading written by Jennifer Marie Hallowell and published by . This book was released on 1996 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guide for Design of Anchorage to Concrete written by American Concrete Institute and published by . This book was released on 2011 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: This guide presents worked examples using the design provisions in ACI 318 Appendix D. Not all conditions are covered in these examples.The essentials of direct tension, direct shear, combined tension and shear, and the common situation of eccentric shear, as in a bracket or corbel, and presented.
Download or read book ACI Materials Journal written by and published by . This book was released on 1995 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Safety Science Abstracts Journal written by and published by . This book was released on 1986 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Behavior of anchors in uncracked concrete under static and dynamic tensile loading written by Milton Rodriguez and published by . This book was released on 1995 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Strength Design of Anchorage to Concrete written by Ronald A. Cook and published by . This book was released on 1999 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Testing the Effects of Reinforcement and Load Distribution of 4 Bolt Anchorages Loaded in Shear written by William C. Murphy and published by . This book was released on 2007 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis of the behavior of four bolt anchorages loaded in shear towards a free edge. Test results are compared to predicted capacities based on the equations and assumptions of various methods proposed by researchers and code procedures. The objectives are to determine if the presence of various reinforcements and friction affect the concrete breakout strength of an anchorage, analyze the effectiveness of hairpin reinforcement in conjunction with nominal edge reinforcement, and examine how distribution of load to each row of anchors affects concrete breakout strength.
Download or read book Shear Behavior of Anchors for Squat Attached Building Components Under Severe Earthquake Loading written by Justin Tyler Scheidel and published by . This book was released on 2011 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of tests were conducted on the shaking table at San Diego State University to determine the shear behavior of non-structural components and their anchor bolts. Three different anchor types were tested, selected because of their varying levels of ductility when forced to failure under shear loading. Anchors were tested in various non-structural component setups and configurations that were observed in building surveys during the initial investigations of the overall project. The dynamic responses of the anchors were compared to the monotonic responses in the different test setups to determine the reduction or increase in capacity, as well as overall anchor response and behavior. Measured anchor results are compared to time-history analysis results and interpretations of this data are presented. The results demonstrate that all anchors have lower dynamic capacities than their monotonic counterparts. Anchors tested with confined and unconfined concrete yielded similar results due to overturning of the non-structural component. Anchor capacity for all anchor types was reduced when cork anti-vibration pads were used. Tests results also show a reduction in anchor capacity when an annular gap is present around anchors. Based on results of the series of tests performed, generalizations and design recommendations are presented and can be summarized as follows. The reduction in anchor capacity when annular gap or cork pads are present should result in designs that reduce the capacity of these anchors accordingly. The confinement of concrete around the anchors does not increase anchor capacity when any uplift is expected at high force and acceleration levels. Also the ductility difference between two of the most comparable anchors tested showed that ductility capacity does not increase the dynamic force or displacement capacity of the anchors or earthquake load level at failure. In the tests performed as part of this project the more ductile anchors proved to yield at lower load levels than their brittle counterparts, and both anchor types failed at the same amplification of the selected earthquake record. It is suggested that further investigations be completed to look into the design recommendations given based on the results gathered as part of this thesis. The data provided in this thesis represents an initial step of the testing required to change the design codes that consider non-structural components and anchorage performance under dynamic loading.
Download or read book Behavior and Design of Cast in place Anchors Under Simulated Seismic Loading written by Luke C. Butler and published by . This book was released on 2013 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Outrigger beam-wall connections are a common method used to transfer lateral load from an earthquake or wind event into the main lateral force resistance system for buildings up to 25 to 30 stories. A typical outrigger beam-wall connection consists of a shear tab welded to an embedded plate which is fastened to the wall by multiple cast-in-place anchors. ACI 318 Appendix D has codified guidelines of how to design cast-in-place anchors for combined tensile and shear loading in cracked and uncracked concrete. However, the code specifically states that Appendix D does not apply to the design of anchors in plastic hinge zones. This limitation is because the code is largely based on "methods developed from tests that are only accurate for crack widths up to 0.04 inches" (Eligenhausen et al. 2006). Due to paucity of past research on the behavior of anchors tested under cyclic loading with heavily damaged concrete, an experimental approach was used to investigate the behavior of a typical outrigger beam-wall connection under simulated seismic loading located in the plastic hinge zone of the structural wall. The test results are presented and compared against those from ACI 318 Appendix D.
