Download or read book PRO 21 International RILEM Symposium on Connections Between Steel and Concrete Set written by Rolf Eligehausen and published by RILEM Publications. This book was released on 2001 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Behavior of shear anchors in concrete written by Hakki Muratli and published by . This book was released on 1998 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 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 Connections Between Steel and Concrete written by R. Eligehausen and published by RILEM Publications. This book was released on 2001 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 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 Behavior and Design of Anchor Bolts in Concrete Masonry Under Combined Tension and Shear Loading written by Anne Marie Fabrello and published by . This book was released on 2001 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Fastenings to reinforced concrete and masonry structures state of art report part I written by FIB – International Federation for Structural Concrete and published by FIB - International Federation for Structural Concrete. This book was released on 1991-08-01 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Numerical Investigation of Concrete Breakout Strength of Anchors in Shear Within Fiber Reinforced Concrete written by Yash Hitendrakumar Patel and published by . This book was released on 2020 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigates the numerical analysis of concrete breakout strength of cast in place anchors in shear within synthetic fiber reinforced concrete (SYN-FRC). A three dimensional, full-scale model was developed using the ABAQUS 6.14 software. The 3D solid elements with consideration of material nonlinearities were chosen to stimulate the SYN-FRC beam anchorage. The numerical analysis was conducted with a fixed loading rate of 300lb per step to obtain the behavior of fiber-reinforced concrete breakout with design-mix compressive strength of 4,000 psi and fiber volume fraction of 0%, 0.5%, 1.0%, and 1.5%. An inverse analysis was used to calibrate the material model defined in the ABAQUS software with experimental data from previous research since fiber reinforced concrete cannot be modeled precisely with the random distribution of fibers in the concrete matrix. Only compression tests and slump tests were performed to testify the results of the tests with the previous experimental data. Since a good agreement between results was observed, the tensile strength, flexure strength, and anchor shear test results for SYN-FRC were directly used to model in ABAQUS. It was discovered that the compressive strength of the concrete decreased as the fiber reinforcement increased, which can contribute to reducing workability and increased air voids from poor consolidation. In contrast, using synthetic fibers leads to an increase in tensile, flexure, and the anchorage capacity of concrete for the cast-in-place anchor loaded in shear. From the numerical analysis, the Modulus of elasticity increased by 2.8%, 5.0%, and 5.1% for the fiber volume fraction of 0.5%, 1.0%, and 1.5%, respectively, in comparison to the empirical computation of Elastic Modulus. Therefore, from numerical analysis, a parametric study was conducted to evaluate the Elastic Modulus for synthetic fiber reinforced concrete by calibrating load-deflection behavior from physical tests.

Download or read book Compressive Force Path Method written by Michael D Kotsovos and published by Springer Science & Business Media. This book was released on 2013-10-04 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a method which simplifies and unifies the design of reinforced concrete (RC) structures and is applicable to any structural element under both normal and seismic loading conditions. The proposed method has a sound theoretical basis and is expressed in a unified form applicable to all structural members, as well as their connections. It is applied in practice through the use of simple failure criteria derived from first principles without the need for calibration through the use of experimental data. The method is capable of predicting not only load-carrying capacity but also the locations and modes of failure, as well as safeguarding the structural performance code requirements. In this book, the concepts underlying the method are first presented for the case of simply supported RC beams. The application of the method is progressively extended so as to cover all common structural elements. For each structural element considered, evidence of the validity of the proposed method is presented together with design examples and comparisons with current code specifications. The method has been found to produce design solutions which satisfy the seismic performance requirements of current codes in all cases investigated to date, including structural members such as beams, columns, and walls, beam-to-beam or column-to-column connections, and beam-to-column joints.

Download or read book Connections between Steel and Concrete written by Rolf Eligehausen and published by ibidem-Verlag / ibidem Press. This book was released on 2012-02-27 with total page 1430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anchorage by fasteners and composite structures of steel and concrete have seen dramatic progress in research, technology and application over the past decades. The understanding of the fundamental principles underlying both disciplines has significantly improved. Concurrently, there has been rapid growth in the development of sophisticated new products and the establishment of international directives and codes to ensure their safe and economical use in a wide range of engineered structures. Although they deal with very similar problems, the two disciplines have developed independently from each other. To optimize the use of composite structures and fastenings to concrete, however, it is necessary to have knowledge of both: the local behavior of the fastening system and the global behavior of the structure. It became apparent that a forum offering the opportunity to expand and to exchange experience in the field of connecting steel and concrete would benefit all involved. Furthermore this forum would aid in the rapid dissemination of new ideas, technologies and solutions as well as explore new areas of research.This book forms the Proceedings of the 2 Symposium on “Connections between Steel and Concrete”. As the 1 Symposium in 2001 it brought together leading experts from all facets of the research, design, construction and anchor manufacturing community from around the world. Their lectures covered the topics:- test methods- behavior and design- dynamic loading: shock, earthquake, fatigue- durability- exceptional applications, strenghtening and structures- related topicsIn total 129 papers are gathered in these 2 volumes.

Download or read book Manual of Steel Construction written by American Institute of Steel Construction and published by . This book was released on 1973 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Shear Reinforcement on the Large deflection Behavior of Reinforced Concrete Slabs written by Stanley Clyde Woodson and published by . This book was released on 1993 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fastenings to reinforced concrete and masonry structures state of art report part II written by FIB – International Federation for Structural Concrete and published by FIB - International Federation for Structural Concrete. This book was released on 1991-08-01 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: