Backbone Model for Performance-Based Seismic Design of RC Walls for Low-Rise Housing

The walls of modern low-rise economic housing in several Latin American countries are typically thin and have a low concrete strength, web steel ratios that are smaller than the minimum prescribed by current codes, and web shear reinforcement made of welded-wire mesh. In light of these particular wall characteristics, research was aimed at developing a performance-based backbone model capable of predicting the seismic behavior of reinforced concrete (RC) walls for one- and two-story housing. The selected tri-linear model is associated with three limit states: diagonal cracking, peak shear strength, and ultimate deformation capacity. The model was developed on the basis of the observed response of 39 quasi-static and shake table experiments. Iterative nonlinear regression analyses were performed for deriving the semi-empirical equations in this study. The paper also discusses the adequacy of some existing models to predict the seismic behavior of RC walls and the limitations of the proposed equations.

[1]  C. R. Farrar,et al.  Low-Rise Shear Wall Ultimate Drift Limits , 1994 .

[2]  S. Alcocer,et al.  Shear Strength of Reinforced Concrete Walls for Seismic Design of Low-Rise Housing , 2013 .

[3]  Kenneth J. Elwood,et al.  Backbone Model for Confined Masonry Walls for Performance-Based Seismic Design , 2009 .

[4]  J. Dario Aristizabal-Ochoa,et al.  Cracking and Shear Effects on Structural Walls , 1983 .

[5]  Yoshio KITADA,et al.  MULTI-DIRECTIONAL LOADING TEST FOR RC SEISMIC SHEAR WALLS , 1999 .

[6]  C. R. Farrar,et al.  Shear wall ultimate drift limits , 1994 .

[7]  Andrew S. Whittaker,et al.  Shear strength of squat rectangular reinforced concrete walls , 2008 .

[8]  Julián Carrillo,et al.  Experimental investigation on dynamic and quasi‐static behavior of low‐rise reinforced concrete walls , 2013 .

[9]  Sergio M. Alcocer,et al.  Seismic performance of concrete walls for housing subjected to shaking table excitations , 2012 .

[10]  John W. Wallace,et al.  Modelling issues for tall reinforced concrete core wall buildings , 2007 .

[11]  J M Hanson,et al.  SHEAR STRENGTH OF LOW-RISE WALLS WITH BOUNDARY ELEMENTS , 1976 .

[12]  Mjn Priestley,et al.  Performance based seismic design , 2000 .

[13]  Sharon L. Wood,et al.  Shear Strength of Low-Rise Reinforced Concrete Walls , 1990 .

[14]  Cevdet Kerem Gulec,et al.  Performance-based assessment and design of squat reinforced concrete shear walls , 2009 .

[15]  J. R. Benjamin,et al.  The Behavior of One-Story Reinforced Concrete Shear Walls , 1957 .

[16]  Sergio M. Alcocer,et al.  Improved external device for a mass‐carrying sliding system for shaking table testing , 2011 .

[17]  B. Taranath.  Seismic Rehabilitation of Existing Buildings , 2004 .

[18]  P. Adebar,et al.  ACCOUNTING FOR SHEAR IN SEISMIC ANALYSIS OF CONCRETE STRUCTURES , 2002 .

[19]  C. Ledezma,et al.  Seismic Behavior of Squat Reinforced Concrete Shear Walls , 2002 .