Mechanics And Behavior Of Slender Post Tensioned Masonry Walls To Transverse Loading
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Mechanics And Behavior Of Slender Post Tensioned Masonry Walls To Transverse Loading
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Author : Jennifer Renae Bean Popehn
language : en
Publisher:
Release Date : 2007
Mechanics And Behavior Of Slender Post Tensioned Masonry Walls To Transverse Loading written by Jennifer Renae Bean Popehn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
Behavior Of Unbounded Post Tensioned Masonry Walls
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Author : Reza Hassanli
language : en
Publisher: Springer
Release Date : 2018-08-07
Behavior Of Unbounded Post Tensioned Masonry Walls written by Reza Hassanli and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-08-07 with Technology & Engineering categories.
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.
Advances In Geosynthetics Engineering
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Author : Mohamed Meguid
language : en
Publisher: Springer
Release Date : 2018-10-28
Advances In Geosynthetics Engineering written by Mohamed Meguid and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-10-28 with Science categories.
This volume contains contributions on advances in geosynthetics engineering. Soil reinforcement is a very useful technique to construct several cost-effective soil structures in an environmentally friendly and sustainable manner. The most commonly used reinforcement materials are galvanised steel strips, geosynthetics in the form of woven geotextiles, geogrids and geocomposites, and fibres from natural and waste products. In recent years, there have been advances in the area of soil reinforcement, especially in the utilization of the technique in field projects. The researchers have also been working to understand the behaviour of reinforced soil considering the field challenges of reinforced soil structures. The volume is based on the best contributions to the 2nd GeoMEast International Congress and Exhibition on Sustainable Civil Infrastructures, Egypt 2018 – The official international congress of the Soil-Structure Interaction Group in Egypt (SSIGE).
Out Of Plane Behavior Of Slender Post Tensioned Masonry Walls Constructed Using Restrained Tendons
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Author : Christopher Robert Drake
language : en
Publisher:
Release Date : 2004
Out Of Plane Behavior Of Slender Post Tensioned Masonry Walls Constructed Using Restrained Tendons written by Christopher Robert Drake and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Dissertation Abstracts International
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Author :
language : en
Publisher:
Release Date : 2008
Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Dissertations, Academic categories.
Behavior Of Unbonded Post Tensioned Masonry Walls
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Author : Reza Hassanli
language : en
Publisher:
Release Date : 2015
Behavior Of Unbonded Post Tensioned Masonry Walls written by Reza Hassanli and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Concrete masonry categories.
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.
Post Tensioned Concrete Masonry Walls Subjected To Uniform Lateral Loading
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Author : Gabriel Gadison Aridru
language : en
Publisher:
Release Date : 1992
Post Tensioned Concrete Masonry Walls Subjected To Uniform Lateral Loading written by Gabriel Gadison Aridru and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Concrete walls categories.
Performance Of Post Tensioned Clay Brick Masonry With Openings
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Author :
language : en
Publisher:
Release Date : 2004
Performance Of Post Tensioned Clay Brick Masonry With Openings written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
This dissertation aims to advance the understanding of unbonded post-tensioned masonry wall systems. Previous research has shown that unbonded post-tensioned masonry walls can adequately resist in-plane loading but their possible use in regions of high seismic activity has not been widely accepted. The research described in this dissertation focuses primarily on clay brick masonry. The first study is on the in-plane cyclic behavior of unbonded post-tensioned masonry walls with openings. Openings can interrupt the standard path of the compression strut. The compression strut is how unbonded post-tensioned masonry walls distribute the lateral load to the foundation, and without it the wall can become unstable. The results show that the size and location of the opening has a major effect of the overall response of the wall. As the opening size increases the compression strut becomes more unstable. Experimental studies involved the construction and testing of three walls. A parametric study was conducted to determine the effect of opening size and aspect ratio on the behavior of unbonded post-tensioned masonry walls with openings. Several tables are proposed for the initial design of these walls depending on the opening size and aspect ratio of the wall. The latter part of the dissertation focuses on the Direct Displacement-Based Design (DDBD) of unbonded post-tensioned clay brick masonry walls. A unique problem of the use of clay brick masonry walls arose and was studied. Because clay brick masonry and the concrete foundation's Young moduli are different, the interaction between the two surfaces was analyzed. It is shown that the foundation locally confines the clay brick masonry, thereby increasing its compressive strength. Without including this confinement, effect the lateral resisting strength is greatly underestimated. Previous methods are modified to predict the compressive strength of clay brick masonry at the wall/foundation interface. The method is verified a.
Uncertainty Analysis Of Reinforced Concrete Masonry Walls Under Out Of Plane Loading
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Author : Ziead Metwally
language : en
Publisher:
Release Date : 2022
Uncertainty Analysis Of Reinforced Concrete Masonry Walls Under Out Of Plane Loading written by Ziead Metwally and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with Concrete masonry categories.
Masonry, as a conventional construction material, is widely used due to its durability, strength, hygrothermal performance, and aesthetics. However, the behaviour of masonry structures is not fully comprehended, especially in the face of uncertainty. This lack of understating on the behaviour of masonry structures is usually compensated by imposing overly conservative design provisions. Inherent uncertainties in the material and geometric properties of masonry structures result in large scatter in the experimentally or analytically predicted behaviour. Thus, understanding the influence of these uncertainties on the structural behaviour of masonry structures is of paramount importance to lay down the basis for reliable structural design. This thesis focuses on the uncertainty analysis of the out-of-plane behaviour of reinforced concrete masonry walls using mechanics-based finite element (FE) models and experimental testing data. Specifically, this thesis includes three main phases. In the first phase, the probabilistic behaviour of reinforced concrete masonry walls is investigated, employing mechanics-based macro FE models in conjunction with Monte Carlo simulations (MCS). The effect of the inherited uncertainties in the material and geometric properties on different response quantities (e.g., load capacity and deformation capacity) is also investigated through a variance-based global sensitivity analysis. Additionally, the model uncertainty in FE-predicted load capacity is quantified to characterize the model error, which is found to be influential compared to geometric and material uncertainties, though FE models are commonly used for numerical studies. The second phase focuses on assessing the reliability of reinforced concrete masonry walls loaded out-of-plane with the limit state functions formulated employing the developed macro FE models. In this phase, the importance of model uncertainty on the reliability assessment is revealed. The reliability assessment conducted considering different global and local failure criteria provides insights into their effect on the safety levels of walls. The reliability assessment is found to be sensitive to the adopted failure criteria. In addition, different factors are found to influence the reliability assessment of the walls designed according to the masonry design code; specifically, walls with different slenderness ratios and load eccentricities show inconsistent reliability levels. The model errors associated with the out-of-plane load capacity provided in masonry design codes in North America (i.e., CSA S304-14 and TMS 402-16) are investigated in the third phase. FE based and experimental data are used to quantify the model error associated with design code based models. In addition, the sensitivity of the model error to the variations associated with different design parameters is investigated. It is found that CSA S304-14 is overly conservative for highly slender walls with low load eccentricities, while TMS 402-16 gives more reasonable capacity predictions for such walls. However, TMS 402-16 is found to overestimate the capacities of highly slender walls with relatively high reinforcement ratios and load eccentricities. The code based models are employed in reliability assessment to investigate the influence of the accuracy of the behavioural model on the reliability of the masonry walls. It is found that using the code based models in the reliability assessment without considering their model error results in significantly biased reliability results. This highlights the need and potential room for design code model improvement.
Brick And Block Masonry
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Author : Claudio Modena
language : en
Publisher: CRC Press
Release Date : 2016-11-03
Brick And Block Masonry written by Claudio Modena and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-11-03 with Technology & Engineering categories.
Brick and Block Masonry - Trends, Innovations and Challenges contains the lectures and regular papers presented at the 16th International Brick and Block Masonry Conference (Padova, Italy, 26-30 June 2016). In an ever-changing world, in which innovations are rapidly implemented but soon surpassed, the challenge for masonry, the oldest and most traditional building material, is that it can address the increasingly pressing requirements of quality of living, safety, and sustainability. This abstracts volume and full paper USB device, focusing on challenges, innovations, trends and ideas related to masonry, in both research and building practice, will proof to be a valuable source of information for researchers and practitioners, masonry industries and building management authorities, construction professionals and educators.