Abstract

CARRILLO, Julián  and  ALCOCER, Sergio M.. Comportamiento a cortante de muros de concreto para vivienda. Ing. sísm [online]. 2011, n.85, pp.103-126. ISSN 0185-092X.

The lack of suitable building codes for designing low-rise housing has promoted that the performance of such structures has been inadequate during the most recent earthquakes occurred in Latin American countries. Construction of concrete housing is currently one of the most accomplished techniques. Due to the potential lateral stiffness and strength of concrete wall structures, forces and displacements demands are limited, thus leading to the use of walls with low concrete strength, small thickness, web steel ratio smaller than the minimum amount prescribed by the code and shear web reinforcement made of welded wire meshes. Considering the particular wall characteristics, existing analytical models and requirements in current codes are not directly applicable. Based on an extensive experimental and analytical research program, equations for estimating the maximum shear strength are developed. In addition, using a performance-based seismic design approach, representative values of the main parameters for seismic design are proposed. Shear reinforcement requirements depending on the seismic demand are also recommended.

Keywords : concrete walls; shear strength; low-rise housing; lightweight concrete; performance-based seismic design.

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