シミズHy-ECOS・PS Hy-ECOS構法の適用事例
鉄筋コンクリート(以下、RCと略記)造と鉄骨造(以下、S造と略記)からなるハイブリッド構造は、工期短縮、コストダウンのほか、両構造の特性を生かすことによって剛性の高い大スパン架構を実現できる等のメリットがある。特に、昨今の鋼材価格の高騰を背景にコストダウンを図る目的でハイブリッド構造が採用されてきている。このような状況を鑑み、筆者らはすでに柱をRC造、梁をS造とし、鉄骨梁端部をRCで巻いた「シミズHy-ECOS構法」を開発し、その後、この構法を大スパン架構に適用するために、梁端のRC部分にプレストレスを導入した「シミズPS Hy-ECOS構法」を開発した。本報では、両構法の概要とそれらを適用した案件の設計と施工について紹介する。
Development of SHIMIZU Hy-ECOS and PS Hy-ECOS structure system
The hybrid structure consisting of reinforced concrete structure (hereinafter, RC) and steel structure (hereinafter, S structure) is effective to shorten construction periods and reduce costs in designing large span structures with high rigidity, by taking advantage of the characteristics of both structures. Particularly, the hybrid structures are now commonly used to reduce construction costs against the recent high rise of prices of steel materials. Under this circumstance, "SHIMIZU Hy-ECOS (Hybrid Economical & Ecological Structure) structure system" had developed. This is comprised of RC structure for columns and S structure for beams, which the ends of the steel beams are covered by RC. After that, authors were developed "SHIMIZU PS Hy-ECOS (Prestressed Concrete Hybrid Economical & Ecological Structure) structure system", which is to achieve larger spans than that of the Hy-ECOS structure by applying prestressed materials to the beam end RC. This report described an outline of both structure system and the large hospital which applied both structure system.