In the study, a shape finding procedure for the tensegrity system model inspired by the movement pattern of animal backbone was presented. The proposed system is allowing a dynamic movement by introducing the concept of “saddle” for the variable tensegrity structure. Mathematical process and an algorithm for movable tensegrity to specified points were established. Several examples have applied with in established shape finding analysis procedure. The final tensegrity structures were determined well to a object shape.

For form stability of membrane structures, membrane material is required to be in tension. Therefore, in planning and maintenance management, the engineer should consider enough about introduction of stress during construction and re-introduction of stress after completion. Clamping part is an important portion with the function for introducing tension into membrane materials, and the function to transmit stress to boundary structures, such as steel frames. Then, the purpose of this research is to clarify stress condition and stress transfer mechanism including clamping part of membrane structures, and to grasp the changing tendency of membrane structures with the passage of time. In this research, following previous one, we perform well-balanced evaluation by conducting tensile fractured tests of clamping part's specimens, and by measuring individually the amount of displacement of not only overall specimen's length but membrane material and clamping part. Thereby, we consider the influence the difference in the hardness of edge rope and the difference in the direction of thread affect modification and fracture load.

Tensile load tests were conducted on High-Shear Ring Anchors (HRAs) after shear load had been applied to the HRAs, which had been developed to reduce the number of the anchors. Test variables include the embedment length of the rod and the width of the specimens and a total of 12 specimens were tested. Test results show that the HRAs pulled out due to bond failure or steel failure occurred in case that the HRAs were installed to the members with 300mm or greater width and the embedment length of 160mm (the actual embedment of rod is 140mm) or deeper. Except 4 HRAs showing steel failure of rod, the minimum and average of test-to-prediction by ACI 318-14 ratios are 1.18 and 1.79, respectively. The tensile strength of HRAs, after shear load was applied to the HRAs, can be safely evaluated by the minimum among the concrete breakout strength and bond strength with the actual embedment length of the rod.

기존 구조물의 리모델링, 내진보강 및 용도변경에 따른 구조 보강의 수요가 증가하고 있다. 기존에는 내진보강 공법으로 전단벽 증설 또는 신설방식의 보강 공사가 주를 이루었다. 하지만, 최근에는 시공적인 측면과 전단벽 신설 시 발생하는 기초 보강을 최소화하기 위해 강재를 이용한 건식 내진보강 공법이 증가하고 있다. 신구 콘크리트 부재 연결을 위한 고전단 링앵커와, 기존 콘크리트와 신규 강재 접합용 고전단 링앵커를 개발되었다. 개발 후 학교 건축물을 비롯하여 다수의 실제 프로젝트에 적용되었으며, 구조효율성과 시공성 우수성이 검증되었다. 이 발표에서는 콘크리트용 및 강재용 고전단 링앵커의 설계 와 시공 사례를 소개하고자 한다.

The capacity of post-installed anchor used in joining of new and old concretes structures is dominated by shear force of steels. Thus, too many anchors are required to demonstrate the reinforcement effects. In this study, a new ring anchor with high-shear resistance capacity is presented. This study evaluated that shear capacity by concrete strength and beam width through nonlinear analysis.