Última modificación: 2019-08-31
Resumen
Introduction.
In order to close the gap in the housing deficit, a solution for housing projects is the prefabrication. In Latin American countries, prefabrication has not been able to take off (Nieto, 2012). Instead structures with masonry have prevailed. However, looking to reduce construction times and costs in housing projects, the Cold-Formed Steel (CFS) has been adopted such as structural frame whereas the walls continue being of simple masonry. Masonry and CFS frames have a defective seismic response because they do not have the capacity to dissipate energy. The problem in the simple masonry is the lack of capacity to withstand shear forces, on the other hand, the problems in the CFS frames are the compression and the width-to-thickness ratio of the columns and beams furthermore the connection between these elements (Mojtabaei, Kabir, Hajirasouliha, & Kargar, 2018). The tests are looking to identify the behavior of each material under seismic effects that lead to collapse, detecting critical points of failure. The methodology for displacement analysis in the masonry (Zúñiga Cuevas & Terán Gilmor, 2008) and the finite element method for the CFS frames will permit find a methodology to design a structure with an adequate seismic response in zones of medium level seismic.
Hypothesis.
The combination of a rigid material such as simple masonry confined by Cold-Formed Steel frame of limited ductility, is capable of generating the ductility necessary to dissipate cyclical efforts in a zone of medium seismic level.
Objective.
To characterize the seismic performance of the combined structure of simple masonry with horizontally drilled clay bricks confined by a Cold-Formed Steel frame of elements in box-shape.
Methodology.
Determinate through some tests the maximum lateral force, deformation, cracking, critical fail and general behavior under monotonic load.
With the experience obtained in this firsts prototypes, to adjust details such as welds, reinforced connections, shear connectors between masonry and steel frame, to warrant an optimal performance into the cyclic essay.
After obtaining the results and compare with the theory process to design these elements for themselves, the next step is to analyze a new methodology to design the combined frame with an acceptable seismic response, to finally compare with results obtained from a vibrating table test.
Expected results.
Develop knowledge through a new methodology of design that considers the structural benefits of each material, without exceeding the efforts and compliance of the described lateral deflections by design normative, obtaining an adequate seismic response.
To detect the common failures in this mixed wall to avoid seismic problems in the future in structures built with the same typology and generate recommendations to reinforce these projects to save lives in the future.