Evaluation of Strength Loss due to Diagonal Crack and  Parameters Affecting it in Masonry Infill Walls

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Alinejad, Nasrollah | 2016

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 49265 (09)
University: Sharif University of Technology
Department: Civil Engineering
Advisor(s): Moghaddam, Hassan
Abstract:
Masonry infills are vastly used as surrounding walls and partitions. Presence of infill in a building causes some change in strength, stiffness, period and generally seismic behavior of the structure.Mainly there are 5 modes of failure including 1- interface cracking 2- sliding along bed joint 3- diagonal cracking 4- corner crushing and 5- ultimate failure. According to these failures, three stages of strength as shear strength, corner strength and ultimate strength can be defined.Diagonal crack can be calculated by slip surface method grown in Sharif university of Technology. Based on this method the strength of infill wall falls down as the cohesive strength of mortar loses and so the slip will begin. Previous experiments also showed an accidental loss just after slip. The strength loss can be interpreted by slip surface method.In this thesis, we try to obtain the constant coefficients of the slip surface method by investigating previous experiments and reverse analysis of their results. These coefficients indicate the strength of infill that can be determined by using the results of large scale experiments
Keywords:
Shear Strength ; Masonry Infilled Walls ; Cohesive Crack ; Sliding Surface ; Cohesive Strength of Mortar

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