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Author: search.filters.author.Mario SolísSubject: search.filters.subject.Adobe masonry

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    Mechanical characterization of adobe masonry
    (Springer Nature, 2021-01-01)
    The characterization of the mechanical properties and behaviour of adobe masonry is fundamental for the understanding of the structural behaviour of adobe constructions. Thus, in the last decades, experimental studies focused on this topic have been carried out by different authors. Many of the existing experimental works, however, were carried out aiming to support broader studies focused on the seismic behaviour of adobe constructions and are not very detailed. Moreover, authors tend to adopt different procedures in their experimental work, since there are few indications in existing standards for testing adobe masonry. The wide variety in materials used, both for the adobes and mortars, further complicates this work, making it difficult to compare results obtained in different studies. This chapter provides an overview of the indications given by standards and other technical recommendations for the mechanical testing of adobe masonry. It presents a review of existing research on the mechanical behaviour of adobe masonry, addressing studies that focus on: (i) compression behaviour, (ii) shear behaviour, (iii) joint shear behaviour. It provides a global analysis of the existing knowledge, suggesting improvements for normative documents and identifying future research needs.
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    Mechanical characterization of adobe bricks
    (Springer Nature, 2021-01-01)
    The mechanical characterization of adobe bricks is an important first step in the study of the behaviour of adobe masonry. For this reason, in the last decades, different authors have conducted research on the mechanical behaviour of adobes from various regions of the world. Despite the importance of mechanical characterization, there are still only a few standards and normative documents with clear indications for the mechanical testing of earthen materials and, in general, these indications are not thorough and vary among different countries. Consequently, authors tend to adopt different types of test specimens and procedures in their experimental work, thus obtaining results that are not directly comparable. The fact that the materials and procedures traditionally used are also not standardized, varying greatly from region to region, also contributes to the difficulty of comparing results from different studies. This chapter presents a review of the indications provided by codes, standards and other technical recommendations for the mechanical testing of adobe bricks, as well as a detailed review of procedures adopted, and results obtained by different authors regarding the mechanical characterization of traditional adobe bricks. This chapter focuses, in particular, on the behaviour of adobe bricks when subjected to simple compression. It provides an overview of the existing knowledge and identifies needs for future research and development.
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    Calibration of a total strain crack model for adobe masonry based on compression and diagonal compression tests
    (Elsevier Ltd, 2022-10-17)
    Although it has good compressive behavior, adobe masonry is classified as a quasi-brittle material mainly due to its relative low tensile strength and softening behavior after the peak tensile strength. The behavior, plus the high variability in the adobe mechanical properties, makes it difficult to evaluate the performance of entire adobe buildings. For such a purpose, the development of reliable and computationally efficient numerical approaches is required. This work shows a numerical methodology to calibrate the main mechanical parameters to be used in the numerical modeling of adobe samples following the finite element method (FEM) by using the Total-Strain Crack model. The present paper shows that this numerical model is able to represent the nonlinear behavior of the adobe masonry. The calibration process is based on preliminary experimental tests performed on masonry prisms (piles and wallets) subjected to axial compressive and diagonal compression loads, respectively. The main results show that it is possible to model adobe masonry in practice. A consistent reproduction of the cracking pattern from experimental tests is obtained. By using the calibrated properties, this work may be extended to evaluate the seismic vulnerability of complete adobe structures.