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Author : Rory S. Giles
Publisher :
ISBN 13 :
Total Pages : 55 pages
Book Rating : 4.:/5 (223 download)
Download or read book An Investigation Into the Behaviour of Masonry Walls Subjected to Lateral In-plane Loading written by Rory S. Giles and published by . This book was released on 2001 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Miha Tomazevic
Publisher : World Scientific
ISBN 13 : 1783262524
Total Pages : 281 pages
Book Rating : 4.7/5 (832 download)
Download or read book Earthquake-resistant Design Of Masonry Buildings written by Miha Tomazevic and published by World Scientific. This book was released on 1999-07-05 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last few decades, a considerable amount of experimental and analytical research on the seismic behaviour of masonry walls and buildings has been carried out. The investigations resulted in the development of methods for seismic analysis and design, as well as new technologies and construction systems. After many centuries of traditional use and decades of allowable stress design, clear concepts for limit state verification of masonry buildings under earthquake loading have recently been introduced in codes of practice.Although this book is not a review of the state-of-the-art of masonry structures in earthquake zones, an attempt has been made to balance the discussion on recent code requirements, state-of-the-art methods of earthquake-resistant design and the author's research work, in order to render the book useful for a broader application in design practice. An attempt has also been made to present, in a condensed but easy to understand way, all the information needed for earthquake-resistant design of masonry buildings constructed using traditional systems. The basic concepts of limit state verification are presented and equations for seismic resistance verification of masonry walls of all types of construction, (unreinforced, confined and reinforced) as well as masonry-infilled reinforced concrete frames, are addressed. A method for seismic resistance verification, compatible with recent code requirements, is also discussed. In all cases, experimental results are used to explain the proposed methods and equations.An important part of this book is dedicated to the discussion of the problems of repair, retrofit and rehabilitation of existing masonry buildings, including historical structures in urban centres. Methods of strengthening masonry walls as well as improving the structural integrity of existing buildings are described in detail. Wherever possible, experimental evidence regarding the effectiveness of the proposed strengthening methods is given.
Author : Miha Tomaževič
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (332 download)
Download or read book In-plane Behaviour of Reinforced Masonry Walls Subjected to Cyclic Lateral Loads written by Miha Tomaževič and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Miha Tomaževič
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (33 download)
Download or read book In-plane Behaviour of Reinforced Masonry Walls Subjected to Cyclic Lateral Loads written by Miha Tomaževič and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Reza Hassanli
Publisher : Springer
ISBN 13 : 331993788X
Total Pages : 277 pages
Book Rating : 4.3/5 (199 download)
Download or read book Behavior of Unbounded Post- tensioned Masonry Walls written by Reza Hassanli and published by Springer. This book was released on 2018-08-07 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports on a comprehensive analytical, experimental and numerical study on the flexural response of post-tensioned masonry walls under in-plane loads. It explores an important mechanism in this new generation of structural walls, called “Self-centering”. This mechanism can reduce residual drifts and structural damage during earthquake ground motion, and is particularly favorable for structures which are designed for immediate occupancy performance levels. The book reports on the development and verification of a finite element model of post-tensioned masonry walls. It describes a detailed parametric study to predict the strength of post-tensioned masonry walls. New design methodologies and expressions are developed to predict the flexural strength and force-displacement response of post-tensioned masonry. Experimental study is carried out to better understand the behavior of post-tensioned masonry walls and also to evaluate the accuracy of the proposed design procedure and expressions. The book also includes an introduction to current research on unbounded post-tensioned masonry walls, together with an extensive analysis of previously published test results.
Author : Charlotte Louise Knox
Publisher :
ISBN 13 :
Total Pages : 289 pages
Book Rating : 4.:/5 (86 download)
Download or read book Assessment of Perforated Unreinforced Masonry Walls Responding In-plane written by Charlotte Louise Knox and published by . This book was released on 2012 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research presented in this thesis describes the seismic assessment of perforated unreinforced masonry (URM) walls subjected to in-plane loading through accurate analysis of the wall lateral capacity and seismic demand. Current assessment methods for determining the capacity of perforated URM walls loaded in-plane, as outlined in the New Zealand guideline document (NZSEE 2006), are based on the assumption of infinitely rigid spandrel elements. From observations of damage after the 2010/2011 Canterbury earthquake sequence, this assumption has been proven to be invalid for certain perforated wall geometries. The research reported in this thesis was conducted with the primary aim of developing a practitioner focused assessment tool that accurately captured the global and local response of a perforated URM wall, with an emphasis placed on defining the influence of the spandrel geometry on the system level response of perforated URM walls responding in-plane. Pseudo-static cyclic testing of six full-scale pier-spandrel substructures and a two storey half-scale isolated perforated URM wall was conducted to investigate the variables which control spandrel failure mode and the influence of spandrel failure on the lateral capacity of multi-storey URM walls. Testing showed that the behaviour of the spandrel has a significant effect on the failure mode of the piers and hence the strength, stiffness and energy dissipation capacity of the system. A non-linear Equivalent Frame modelling method for perforated URM walls using the structural analysis software SAP2000 was appropriately validated using modelling results and experimental data. Spandrel behaviour was included within the modelling through the use of a moment-axial failure domain and a shear-axial relationship. Finally, a modified linear elastic procedure for assessing the demand on the in_ plane loaded walls of URM buildings with flexible diaphragms was developed and validated through the use of non-linear time history modelling.
Author : Hong Hao
Publisher : CRC Press
ISBN 13 : 0203073088
Total Pages : 409 pages
Book Rating : 4.2/5 (3 download)
Download or read book Advances in Protective Structures Research written by Hong Hao and published by CRC Press. This book was released on 2012-08-17 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Association of Protective Structures (IAPS) was launched on 1 October 2010 in Manchester, UK during the first International Conference of Protective Structures. The primary purpose of IAPS is to bring researchers and engineers working in the area of protective structures together, and to promote research and development work for b
Author : Miha Tomaževič
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (33 download)
Download or read book In-plane behaviour of reinforced masonry walls subjected to cyclic lateral loads written by Miha Tomaževič and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nitin Bansal
Publisher : Independently Published
ISBN 13 :
Total Pages : 122 pages
Book Rating : 4.6/5 (135 download)
Download or read book Behaviour of Masonry Wall at Corners Under Earthquake written by Nitin Bansal and published by Independently Published. This book was released on 2020-02-13 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Building structures using masonry is one of the most widely adopted construction practices. However, its seismic performance in earthquake prone regions is a major concern. Majority of the research work which has been carried out for studying the failure pattern of masonry, either targets in-plane failure or out-of-plane failure of walls. However, various survey reports on the damage caused by earthquakes mention about failure of the corner walls of masonry structures such as those situated at the end of a row of structures, in a peculiar manner. Failure in such walls is characterized by the simultaneous overturning of a portion of orthogonal walls which is possible only if lateral loads act along the corners, implying each corner wall is subjected to bidirectional loading. Since the literature addressing such failure, are limited, therefore this study has been carried out to explore the reasons leading to corner failure of masonry structures.In this study, in order to examine the failure pattern at corner in dry masonry structures, finite element (FE) technique was adopted. Various masonry models with varying vertical load were subjected to dynamic loading along the corner to observe their combined effect on failure pattern. This analysis showed the pattern of propagation of crack through the bed joint along under varying dead load conditions. Since it is not possible to perform FE analysis for all the masonry structures, mathematical relations were derived to calculate the limiting acceleration at which corner failure can occur. These relations were obtained by assuming feasible failure mechanisms and applying the concept of limit state analysis. For studying the failure pattern of corner in mortar bonded masonry, the FE approach adopted for dry masonry was extended. Micro-modelling which is mostly adopted for modelling mortar bonded masonry was modified by introducing the concept of equivalent friction to simulate the behaviour of mortar in shear. Cracks were observed to pass through the bricks along with the bed joints which lead to toe crushing due to overturning of failure portion. Through this study an understanding of failure of the corner has been developed.
Author : Kun Hu
Publisher :
ISBN 13 :
Total Pages : 224 pages
Book Rating : 4.:/5 (126 download)
Download or read book Behavior of Reinforced Concrete Masonry Walls Subjected to Combined Axial Loading and Out-of-plane Bending written by Kun Hu and published by . This book was released on 2005 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mu Lu
Publisher :
ISBN 13 :
Total Pages : 354 pages
Book Rating : 4.:/5 (319 download)
Download or read book Stability of Unreinforced Masonry Members Under Simultaneous Vertical and Out-of-plane Lateral Loads written by Mu Lu and published by . This book was released on 2003 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jan Kubica
Publisher : CRC Press
ISBN 13 : 1000225577
Total Pages : 1097 pages
Book Rating : 4.0/5 (2 download)
Download or read book Brick and Block Masonry - From Historical to Sustainable Masonry written by Jan Kubica and published by CRC Press. This book was released on 2020-07-06 with total page 1097 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brick and Block Masonry - From Historical to Sustainable Masonry contains the keynote and semi-keynote lectures and all accepted regular papers presented online during the 17th International Brick and Block Masonry Conference IB2MaC (Kraków, Poland, July 5-8, 2020). Masonry is one of the oldest structures, with more than 6,000 years of history. However, it is still one of the most popular and traditional building materials, showing new and more attractive features and uses. Modern masonry, based on new and modified traditional materials and solutions, offers a higher quality of life, energy savings and more sustainable development. Hence, masonry became a more environmentally friendly building structure. Brick and Block Masonry - From Historical to Sustainable Masonry focuses on historical, current and new ideas related to masonry development, and will provide a very good platform for sharing knowledge and experiences, and for learning about new materials and technologies related to masonry structures. The book will be a valuable compendium of knowledge for researchers, representatives of industry and building management, for curators and conservators of monuments, and for students.
Author : Zuhair Al-Jaberi
Publisher :
ISBN 13 :
Total Pages : 264 pages
Book Rating : 4.:/5 (14 download)
Download or read book Strengthening of Reinforced Masonry Walls Subjected to Out-of-plane Pseudo-static Cyclic Load Using Advanced Composite written by Zuhair Al-Jaberi and published by . This book was released on 2018 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A number of researchers have conducted experimental tests on unreinforced masonry walls (URM) strengthened with advanced composite materials. Consequently, the strengthening design guidelines are limited in their scope to URM. This research aimed to investigate the behavior of reinforced masonry walls strengthened with advanced composite and subjected to out-of-plane pseudo-static cyclic load. Experimental and analytical studies were conducted to evaluate the performance of different techniques such as near surface mounted (NSM) and externally bonded (EB) fiber reinforced polymer (FRP) with epoxy resin, in addition to NSM with cementitious adhesive and fiber reinforced cementitious material (FRCM). The experimental part included three phases. In the first phase, a series of 42 reinforced masonry walls were tested to study the effectiveness of advanced composites in enhancing out-of-plane flexural capacity. The effect of long-term environmental exposure on strengthening systems was investigated in the second phase of study by testing 10 reinforced masonry walls. The third phase focused on bond behavior between the advanced composite and the concrete masonry unit at different temperatures; 56 specimens were used for this purpose. The results indicated that the non-arching strengthened reinforced masonry wall's behavior was significantly dependent on the type of fiber and fiber reinforcement ratio. The specimens strengthened with glass under combined environmental cycles exhibited an insignificant change in terms of ultimate strength as compared to laboratory conditioned specimens. The theoretical part included the investigation of bond reduction factors, seismic performance, and the nonlinear analysis of strengthened reinforced masonry wall using moment-curvature analysis. As a result of this study, the proposed model for predicting debonding strain and the moment-curvature relation presented an excellent prediction compared to the experimental results"--Abstract, page iv.
Author : Reza Hassanli
Publisher :
ISBN 13 :
Total Pages : 319 pages
Book Rating : 4.:/5 (952 download)
Download or read book Behavior of Unbonded Post-tensioned Masonry Walls written by Reza Hassanli and published by . This book was released on 2015 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masonry is one of the most widely used construction materials in the world. Incorporating post-tensioning into masonry offers a simple and cost-effective structural system. The post-tensioning techniques can be applied to different types of masonry members as either bonded or unbonded reinforcement. Recent research has demonstrated that unbonded post-tensioned structural elements including concrete walls, concrete columns, and masonry walls can display high ductility levels while withstanding high levels of seismic loads. When an unbonded post-tensioned masonry wall (PT-MW) is subjected to a lateral in-plane load, a single horizontal crack forms at the wall-foundation interface. The restoring nature of the post-tensioning (PT) force returns the wall to its original vertical position and minimizes the residual displacement. This behavior is specifically favorable for structures which are designed for immediate occupancy performance levels. The rocking mechanism of PT-MWs results in plastic deformation concentrated at the toe of the wall which can be repaired with minimal cost. While in members having bonded PT bars, the force developed in PT bars can be determined considering strain compatibility and equilibrium; for members having unbonded PT bars, theoretical evaluation of the stress developed in PT bars is challenging as it depends on the elongation of the unbonded PT bar. This study aims to get a better understanding of the in-plane behavior of PT-MWs.
Author : Joseph M. Allen
Publisher :
ISBN 13 :
Total Pages : 312 pages
Book Rating : 4.:/5 (184 download)
Download or read book Behavior of Post-tensioned, Hollow-core Masonry Walls Subjected to Out-of-plane Loading written by Joseph M. Allen and published by . This book was released on 1988 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Testing of Unreinforced Masonry Walls Strengthened with Orthogonal Near-Surface Mounted CFRP Subjected to Out-of-Plane Loading written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Unreinforced masonry (URM) structures comprise a considerable proportion of the building stock worldwide. However, these structures generally do not behave well under extreme wind or earthquake loading. As part of on-going research, methods of repairing or strengthening URM walls subject to out-of-plane loading using fiber-reinforced polymers (FRP) are being investigated. For several reasons, one method showing particular promise is the use of near-surface mounted (NSM) Carbon FRP strips. Research to-date has made significant progress in quantifying the fundamental behavior of the bonded FRP-to-masonry interface and the behavior of URM walls repaired with vertical FRP strips subject to out-of-plane loading. This thesis presents the experimental results of five large-scale clay brick masonry walls strengthened using NSM CFRP strips and loaded out-of-plane statically to failure using an airbag system. Vertical and Horizontal NSM configurations were tested separately as well as orthogonal grid configurations constructed using two different techniques. The experimentally observed failure mechanisms are described in detail for each wall.
Author : Laura Sendra González
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (112 download)
Download or read book Numerical Analysis of the Out-of-plane Behavior of Unreinforced Masonry Walls written by Laura Sendra González and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Out-of-plane stability of unreinforced masonry walls is an important aspect to be taken into account in edification. This construction technique is widely used and it is one of the most vulnerable to seismic loading. It has been observed that damage produced by out-of-plane loadings is one of the most commonly produced failure mechanisms in seismic hazards. Despite of that, research into the out-of-plane stability of masonry walls is not yet enough developed. The aim of this research is to create a three-dimensional finite element model in order to study the latter problem. A parametrical study is performed on two numerical models under monotonic and cyclic out-of-plane loads. The influence of various geometrical and boundary conditions are studied in two different models of a single wall: a homogenized and a distinct model. A damage plasticity formulation, appropriate for brittle materials, is implemented for modeling the behavior of the wall. In the distinct model, frictional and cohesive interaction models are used for modeling the joints, which are constituted by mortar. Firstly a monotonic homogeneous distributed out-of-plane pressure is applied, in order to determine both, the resistance of the wall in terms of its force-displacement curve, and the failure mechanism. Next, the same model is submitted to cyclic out-of-plane uniform pressure and energy dissipation, as well as stiffness degradation is analyzed. Finally, some qualitative recommendations for the unreinforced masonry walls are derived from the results, with the purpose of maximizing the resistance in front of out-of-plane loading.
