Quantitative method for evaluating applicability of designed reinforcement pattern

Abstract

Original scientific paper Methods for optimal design of the reinforced concrete structures presented in literature usually do not consider detailed reinforcement pattern, or if they do, it is either too generalized or the optimal solution is always the one with the lowest amount of the reinforcement, disregarding its applicability in reality, at the building site. In order to develop adequate apparatus for numerical estimation and easier choice of the most appropriate solution from the practical point of view, a field research was conducted at the building sites for obtaining data about realistic time needed for placing and fixing reinforcement in different formations. Obtained results were normalized and functional correlations between them were established. Testing results confirmed that proposed approach can help a designer to choose the most applicable solution among several theoretically acceptable ones and that the developed reinforcement pattern coefficient can be successfully used in solving complex optimization problems. Keywords: applicability evaluation; optimization; reinforcement pattern; reinforced concrete structures Kvantitativna metoda za ocjenu primjenljivosti projektirane sheme armiranjaIzvorni znanstveni članak U metodama optimalnog projektiranja armiranobetonskih konstrukcija koje se mogu naći u literaturi obično se ne razmatra detaljna shema armiranja ili je, ako se i razmatra, to ili previše uopćeno, ili se za optimalno rješenje uvijek usvaja ono s najmanjom količinom armature, bez obzira na njegovu primjenljivost u stvarnosti, tj. na gradilištu. U cilju razvoja odgovarajućeg matematičkog aparata za numeričku ocjenu i lakši odabir odgovarajućeg rješenja s praktične točke gledišta, provedeno je terensko istraživanje na gradilištima kako bi se prikupili podaci o realnom vremenu potrebnom za postavljanje i fiksiranje različitih rasporeda armature. Prikupljeni rezultati su normalizirani i između njih su uspostavljene funkcionalne korelacije. Rezultati testiranja su potvrdili da prikazani pristup može pomoći projektantu kod odabira najprimjenljivijeg rješenja između nekoliko teorijski prihvatljivih te da se izvedeni koeficijent sheme armiranja može uspješno primijeniti pri rješavanju složenih optimizacijskih problema.

Problemi Optimalnog Dimenzionisanja Armiranobetonskih Konstrukcija

“…But in reality, when faced with a variety of possible and theoretically acceptable solutions, a designer is supposed to find a compromise between the exactness and the applicability at the building site. Because of that, it is recommendable to use some additional criteria for estimating the applicability of a given reinforcement pattern, such as the one proposed in [24].…”

Cost Effective Design of RC Building Frame Employing Unified Particle Swarm Optimization

“…All these studies regarding design optimization of RC building components or frames are conformed to the guidelines decided by the various standards of different countries such as Indian standard (IS 456) [7,11,20,26], American standard (ACI 318, ASCE7) [13,17, 21-25, 28, 29], European standard (Eurocode 2) [15,27]and Australian standard (AS 3600) [14], Brazilian standard (NBR 6118) [12]. Apart from these, RazmaraShooli et al [30] have proposed a GA-PSO based algorithm for performance-based design optimization of a special moment-resisting frames based on guidelines provided by American standards (ATC-40, FEMA 356, ASCE-7 and ASCE-41).In these literatures the researchers used geometry of beam, column, amount of reinforcement, cost of material and shuttering as their optimization variable.In the problems regarding optimized design of RC components, optimizing the distribution of reinforcement are also an important issue [31,32].…”

“…'Tackling magnetoencephalography with particle swarm optimization'. International Journal of Bio-Inspired Computation, 1(1-2),[32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49] [40] IS 456(2000).Plain and Reinforced Concrete -Code of Practice, Bureau of Indian Standards, New Delhi, India [41] IS 875 (Part I) (1987). Code of practice for design loads (other than earthquake)for buildings and structures: part 1 dead loads -unit weights of building material and stored materials, Bureau of Indian Standards, New Delhi, India [42] IS 875 (Part II) (1987).…”

Methodology for developing probabilstic productivity norms in civil engineering

“…For example, productivity rates for man-hours calculation for in-situ reinforcement fixing are based only on total amount of the reinforcing steel, regardless of the pattern complexity which can greatly affect time needed for proper placing, tying and control. Because of that, patterns consisting of 12Ø16 and 3Ø32 bars, respectively, have exactly the same total amount of steel and consequently the same theoretical number of man-hours needed for placing and fixing, although it is obvious that such result would not be realistic, as was proven in studies [2,3].…”