A Beam String Structure (BSS) is a type of hybrid structures, which is composed of upper structural members, lower strings, and struts. Due to the advantages that the pre-tensioned strings elicit pre-caber of the upper structural members, the deflection can be greatly reduced without increasing the structural member size. In this study, a two-way beam string structure is proposed to endure bi-directional loading. The two-way beam string structure consists of two cable parts, namely, sagging and arch-shaped cables. A parametric study is presented aimed at proposing design guide lines of the two-way beam string structures. Numerical finite element analyses through the ABAQUS package were implemented to obtain their behaviors.

This study showed that experimental study of inelastic nonlinear behavior of two-way beam string structures. General large span structures consisting of beam members have large moment and long cross section of area. In order to decrease these excessive moment and deflection, the two-way beam string structures composed of H-Beam, strut, and cable elements were proposed. In the two-way string beam, the cable with the prestress improves force distribution of some weight reduction. Two systems made of structural steel and cables were tested. The nonlinear behaviour of the two-way beam string structures studied by using finite element model and compared to experimental results. The displacement of the LVDT in the center of the beam correspond with the ABAQUS results. 2,200MPa cable can afford to bear breaking load than 1,860MPa cable. The two-way beam string structures is correlated to the finite element model and the experimental results. In consequence, It showed that the system with two-way cables exhibits much better structural performances than H-Beam structures and beam with cable.

This study is proposed to establishment of collaborative environment utilizing BIM-based digital model for cable bridge oversea market entry. It is important to utilization of digital model based framework as such analysis interface, pre-construction technology, data sharing system by design company, general contractor, maintenance agent and government office.

This study is a method to improve the reliability and effectivity of maintenance. It is necessary to build the integrated management system of BIM throughout the design, construction and maintenance of the structure. In order to apply BIM, it was introduced structural record management from the design stage. And It helps to improve the reliability of maintenance.

본 연구에서는 학교 수업에서 교육과정의 이해 및 적용 실태를 알아보기 위해 시･도 교수학습지원센터와 서울특별시과학전시관 홈페이지에 게재되어 있는 교수･학습 과정안에 나타나는 교육과정 위계 오류의 유형을 조사하였다. 각 시･도 교수학습지원센터와 서울특별시과학전시관 홈페이지에 게재되어 있는 교수･학습 과정안을 이용하여 제 7차 교육과정을 토대로 오류 유형 분류틀을 제작하고, 교육과정 위계 오류의 유형별 횟수와 그 내용적 특징을 살펴보았다. 연구 대상으로 분석한 교수･학습 과정안 모두 교육과정 위계 오류를 가지고 있었으며, 교육과정 위계 오류의 유형은 단원의 특성에 따라 다르게 나타났다.