Experimental evaluation of optimized strut‐and‐tie models for a dapped beam

Strut-and-tie modelling constitutes a powerful tool for the design of complex structural reinforced concrete elements. It has been proved numerically that strut-and-tie (ST) models obtained using structural optimization methods produce designs that are more efficient. However, to the best of the authors' knowledge, no experimental evidence of such results has been published. This paper presents experimental results for nine test specimens; five of them were designed using optimal models derived from a full homogenization structural optimization algorithm, and the remaining four using conventional ST models for comparison purposes. Although all specimens carry loads higher than the factored design load, specimens based on ST models derived using full homogenization with reinforcement parallel to the ties exhibit better structural performance regarding crack growth control, more ductile modes of failure and a greater increase in load capacity.

[1]  Keun-Hyeok Yang,et al.  Influence of Inclined Web Reinforcement on Reinforced Concrete Deep Beams with Openings , 2007 .

[2]  J Schlaich,et al.  TOWARD A CONSISTENT DESIGN OF STRUCTURAL CONCRETE , 1987 .

[3]  Roberto Meli,et al.  Experimental study on the structural behavior of concrete dapped-end beams , 2014 .

[4]  Hernán Santa María,et al.  Optimal strut-and-tie models using full homogenization optimization method , 2012 .

[5]  Widianto,et al.  Experimental Verification of Strut and Tie Model Design Method , 2007 .

[6]  Ricardo Perera,et al.  Strut-and-tie modelling of reinforced concrete beams using genetic algorithms optimization , 2009 .

[7]  Brian Uy,et al.  Performance-Based Optimization for Strut-Tie Modeling of Structural Concrete , 2002 .

[8]  Maria Teresa Gomes Barbosa,et al.  Factors Affecting Strength of Elements Designed Using Strut-and-Tie Models. Paper by Sergio F. Breña and , 2007 .

[9]  Matteo Bruggi,et al.  Generating strut-and-tie patterns for reinforced concrete structures using topology optimization , 2009 .

[10]  Bhupinder Singh,et al.  Investigation of Dispersion of Compression in Bottle-Shaped Struts , 2009 .

[11]  Denis Mitchell,et al.  Studies of Disturbed Regions Near Discontinuities in Reinforced Concrete Members , 1988 .

[12]  Daniel A. Kuchma,et al.  Experimental Validation of Strut-and-Tie Method for Complex Regions , 2008 .

[13]  Valério S. Almeida,et al.  Comparative analysis of strut-and-tie models using Smooth Evolutionary Structural Optimization , 2013 .

[14]  G. Allaire,et al.  Shape optimization by the homogenization method , 1997 .

[15]  Antonio Nanni,et al.  VALIDATION OF AN ALTERNATIVE REINFORCING DETAIL FOR THE DAPPED ENDS OF PRESTRESSED DOUBLE TEES , 2002 .

[16]  Oguzhan Bayrak,et al.  Minimum transverse reinforcement for bottle-shaped struts , 2006 .

[17]  Alan H. Mattock,et al.  Design and Behavior of Dapped-End Beams , 1979 .

[18]  Alan H. Mattock,et al.  Strength of Precast Prestressed Concrete Members With Dapped Ends , 1986 .

[19]  Allan H Mattock,et al.  Strut-and-Tie Models for Dapped-End Beams , 2012 .

[20]  K. Nagrodzka-Godycka,et al.  Experimental Study of Dapped-End Beams Subjected to Inclined Load , 2012 .

[21]  John E. Breen,et al.  Evaluation of Strut-and-Tie Modeling Applied to DappedBeam with Opening , 2002 .

[22]  Thomas T. C. Hsu,et al.  CRACK WIDTH PREDICTION USING COMPATIBILITY-AIDED STRUT-AND-TIE MODEL , 2003 .

[23]  H Kim,et al.  Topology optimization for reinforced concrete design , 2002 .

[24]  John E. Breen,et al.  EXPERIMENTAL EVALUATION OF STRUT-AND-TIE MODEL APPLIED TO DEEP BEAM WITH OPENING , 2000 .

[25]  Daniel A. Kuchma,et al.  Integrated analysis and design tool for the strut-and-tie method , 2007 .