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Über dieses Buch

This book discusses the main mechanical features of masonry buildings and the peculiarities that affect their structural behaviour. It also examines technical information regarding accidents that have occurred in recent years in the Metropolitan Region of Recife, along with the historical records of these events, followed by indications of the causes for the collapse.

The book offers extensive experimental results that make it possible to identify the contribution of several mortar rendering layers to the load capacity of the tested specimens. Lastly, it explores the factors that influenced the load capacity of the tested specimens.

Inhaltsverzeichnis

Frontmatter

Chapter 1. Introduction

It is important in masonry design to determine the appropriate ultimate compressive strength of the masonry material. Masonry is a material built from units and mortar that induce an anisotropic behaviour for the composite. The lack of knowledge on the properties of the composite material imposes low assessments of the strength capacity of the masonry wall (Mohamad et al. in Stress-strain behaviour of concrete block masonry prisms under compression, 2012). Atkinson et al. (A deformation failure theory for stack bond, brick masonry prisms in compression, 1985) state that the prediction of compressive strength and deformation of full scale masonry based on compressive tests of stack-bond masonry prism and the interpretation of the results of prism tests have a significant influence on the allowable stress and stiffness used in masonry design.
J. M. P. Q. Delgado, Ana Sofia Guimarães, António C. Azevedo, Romilde A. Oliveira, Fernando A. N. Silva, Carlos W. A. P. Sobrinho

Chapter 2. Physical and Hygrothermal Material Properties

The geometrical characteristics of the clay blocks, i.e.,, their shape and manufacturing dimensions, must meet the tolerances provided:
  • Face measures—Effective dimensions;
  • The thickness of the septa and external walls of the blocks;
  • Deviation from the square (D);
  • Face plane (F);
  • Gross area (Ab).
J. M. P. Q. Delgado, Ana Sofia Guimarães, António C. Azevedo, Romilde A. Oliveira, Fernando A. N. Silva, Carlos W. A. P. Sobrinho

Chapter 3. Influence of Reinforced Mortar Coatings on the Compressive Strength of Masonry Prisms

This work describes an experimental study carried out on running bond 195 red clay prisms, of two and three ceramic blocks, with and without cement mortar coating, subjected to axial compression in order to enhance the capacity of masonry. The prisms were subjected to compressive loading and all of them had deformation control on each face with a deflectometer, in order to obtain information about the behaviour of the prisms.
J. M. P. Q. Delgado, Ana Sofia Guimarães, António C. Azevedo, Romilde A. Oliveira, Fernando A. N. Silva, Carlos W. A. P. Sobrinho

Chapter 4. Structural Performance of Resistant Masonry Elements

In order to evaluate the behaviour of resistant masonry elements used for structural purposes, blocks, prisms, wallets, walls and foundation elements experimentally tested. The prisms were made and tested in the Materials Laboratory of the Catholic University while the walls, walls and foundation elements were made and tested in the ITEP. The details of the elements and tests performed are presented below.
J. M. P. Q. Delgado, Ana Sofia Guimarães, António C. Azevedo, Romilde A. Oliveira, Fernando A. N. Silva, Carlos W. A. P. Sobrinho

Chapter 5. Conclusions

Throughout the research, more than 500 prisms consisting of concrete and ceramic blocks, 154 ceramic blocks wallet specimens were tested.
J. M. P. Q. Delgado, Ana Sofia Guimarães, António C. Azevedo, Romilde A. Oliveira, Fernando A. N. Silva, Carlos W. A. P. Sobrinho
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