Structural Engineering and Mechanics

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Teaching learning-based optimization for design of cantilever retaining walls

  • Temur, Rasim (Department of Civil Engineering, Istanbul University) ;
  • Bekdas, Gebrail (Department of Civil Engineering, Istanbul University)
  • Received : 2015.08.04
  • Accepted : 2016.01.29
  • Published : 2016.02.25
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Abstract

A methodology based on Teaching Learning-Based Optimization (TLBO) algorithm is proposed for optimum design of reinforced concrete retaining walls. The objective function is to minimize total material cost including concrete and steel per unit length of the retaining walls. The requirements of the American Concrete Institute (ACI 318-05-Building code requirements for structural concrete) are considered for reinforced concrete (RC) design. During the optimization process, totally twenty-nine design constraints composed from stability, flexural moment capacity, shear strength capacity and RC design requirements such as minimum and maximum reinforcement ratio, development length of reinforcement are checked. Comparing to other nature-inspired algorithm, TLBO is a simple algorithm without parameters entered by users and self-adjusting ranges without intervention of users. In numerical examples, a retaining wall taken from the documented researches is optimized and the several effects (backfill slope angle, internal friction angle of retaining soil and surcharge load) on the optimum results are also investigated in the study. As a conclusion, TLBO based methods are feasible.

Keywords

Acknowledgement

Supported by : Istanbul University

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