내진설계시 경제성 및 시공성을 고려한 RC 교각의 최적설계

In this study, optimal design of reinforced concrete piers under seismic load is numerically investigated. Object function is he area of the concrete-section. Design variables are the total area of reinforcement and concrete-section dimension (Circular section diameter). Constraints of the design strength of the column, longitudinal reinforcement ratio and lower and upper bounds on the design variables are imposed. The reinforcement concrete column is analysed and designed by the Ultimated Strength Design method and load combination involving dead, live, wind and seismic load is used. For numerical optimization, ADS (Garere N, Vanderplaats) routine is used. From the result of numerical examples, the concrete-section dimension was reduced, but longitudinal reinforcement was not changed. The results show that confinement reinforcement was reduced and confinement reinforcement spacing is increased. The higher strength of reinforcement used, the more concrete-section area was reduced.