Computational Implementation of An Improved Masonry Panel Element


Abstract eng:
The analysis of confined masonry and infilled frames structures is very complex and highly nonlinear due to the interaction between the masonry panel and the surrounding reinforced concrete frame. The equivalent strut model can be used to represent, in a very simplified approach, the effect of the masonry wall. This model may properly represent the global stiffness and resistance of the structure but it is not able to capture local effects, such as the flexural and shear demands in the columns of the frame. On the other hand, refined finite elements models can represent in detail all aspects of the nonlinear response, but they require a high computational cost and their application to large structure can be difficult. This paper presents a macro-model in the form of a twelve-node panel element, which internally includes six diagonal struts. The proper adjustment of the mechanical properties of the struts allows representing the global behavior of the structure and the local effects induced in the different elements of the model. In this way, different type of failure in the masonry panel and in the frame can be considered, such as the horizontal sliding failure of the masonry or the premature shear failure in the columns. In order to facilitate the practical application of the new panel element, the model has been implemented in the opensource software OpenSees, including a precise hysteretic strain-stress relationship to represent the nonlinear axial behavior of the masonry struts in term of both stiffness and strength. The numerical results show a good agreement with experimental data available in the literature. The proposed macro-model, due to its capabilities, can be used for the analysis of large structures, such as multi-story buildings. .

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 501.:
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