Micro-modeling of Masonry Infilled RC Moment Resisting Frames to Investigate Arrangement of Compressive Diagonal Struts

Accurate modeling of masonry has been a major concern of the researchers in the past decades.Besides reinforced and unreinforced masonry buildings, masonry elements can be found in framestructures as infill panels which function as partitions and/or external walls.During an earthquake theseelements act as structural elements and impose a large degree of nonlinearity on the behavior of framing system. In this study, a micro-modeling procedure is proposed utilizing finite element analysis to model masonry infilled reinforced concrete moment resisting frames (RCMRFs). After calibrationusing material tests and standard masonry components, the model will be used to predict the behavioral parameters and failure mode of this type of structures. It will be shown that the proposed procedure issubstantially successful in estimation of the stiffness and strength and can simulate the failure mode ofthe infilled RCMRFs tested under semi dynamic lateral loading. Finally, the process of formation andarrangement of compressive struts in different stages of lateral loading in the infill wall will be discussed. As a result, it will be concluded that the proposed modeling strategy can be used as a means to better recognize the seismic behavior of such structures. The developed strategy can also be used to propose new simplified models or precise existing ones such as equivalent diagonal strut model

کلیدواژه ها:

Masonry Infill Panels ، Micro-modeling ، Nonlinear Analysis ، Finite Element Model