RCEE Research in Civil and Environmental Engineering www.jrcee.com Research in Civil and Environmental Engineering 2014 2 (03) 96-119 PUSHOVER ANALYSIS OF UNREINFORCED MASONRY STRUCTURES BY FIBER FINITE ELEMENT METHOD A. H. Akhaveissy a* , M. Abbassi b a Department of Civil Engineering, Faculty Engineering, Razi University, Kermanshah, Iran. b Department of Civil Engineering, Faculty Engineering, University of Kurdistan, Sanandaj, Iran Keywords A B S T R A C T Masonry wall Macro-modeling Fiber model 2D pushover analyses Finite element analysis A 2D finite element analysis for the numerical prediction of capacity curve of unreinforced masonry (URM) walls is conducted. The studied model is based on the fiber finite element approach. The emphasis of this paper will be on the errors obtained from fiber finite element analysis of URM structures under pushover analysis. The masonry material is modeled by different constitutive stress-strain model in compression and tension. OpenSees software is employed to analysis the URM walls. Comparison of numerical predictions with experimental data, it is shown that the fiber model employed in OpenSees cannot properly predict the behavior of URM walls with balance between accuracy and low computational efforts. Additionally, the finite element analyses results show appropriate predictions of some experimental data when the real tensile strength of masonry material is changed. Hence, from the viewpoint of this result, it is concluded that obtained results from fiber finite element analyses employed in OpenSees are unreliable because the exact behavior of masonry material is different from the adopted masonry material models used in modeling process. 1 INTRODUCTION Masonry is among the oldest material which is used for constructing the buildings and has been considered as the most durable. Masonry is a composite material which consists of units and mortar joints. Prominent new developments in masonry materials and applications have happened in the past two decades. Nowadays, there are a great number of masonry structures around the world. Therefore, the analysis of masonry structures is in considerable interest in various areas of structural and earthquake engineering. Due to its geometrical characteristics, these structures maybe idealized as frames. Masonry buildings are constructed in many parts of the world where earthquakes occur. It has been observed in major recent earthquakes that masonry buildings experienced more serious damages than did concrete * Corresponding author (Phone: + 98 (831) 4274535; Fax: + 98 (831) 4274542; E-mail: [email protected]). ISSN: 2345-3109
PUSHOVER ANALYSIS OF UNREINFORCED MASONRY STRUCTURES BY FIBER FINITE ELEMENT METHOD
Jun 19, 2023
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