Study on Operation Standard Time With Precast Members in Construction of High-Rise Rc Buildings Using High Strength Concrete

Abstract

A45 ・ story RC building ， where pre ・ 。ast cencrete mernbers were ernployed for its outer 丘ame as well as inside colurnns and bearns ， were constuCtion ， and the estirnate equadon of the opcration standard time was examined with its construction data ． As a resu 監 ち the f［) nowing conclusions were obta ed ． 1) In this measuremen ち the installation time of the pre −cast member in the top f監 oor has decreased to 39 ． 4-63 ． 8％ compared with that in the且oor ． 2)In the construction of the high − rise RC building ， the reasoll f () r the reduction in sta置 1ation of th巳 pr巳 ・ cast Golumn and the pre − cast bearn from a lower fioor tO the upper depends on both the imprevement of werke ゼ s capability and the Ghange i 皿 丗 e work di伍 cult ｝ ， ． 3) The change in the 軟) tal mean operation time by repeating work 血 high・ rユ se RC bu 胴 ings can be estimated with 血 e logarithln model ofthe leam 藍 ng engineering ． Howeve ら it is necessary to consider the change in the work di伍 culty for evaluation of the insta 艮 1ation time ofp 鵜 ・ Gast menibers in high − rise RC buildings ．