In this study, Rebar of SD500, SD600 is applied to the designed or constructed in domestic apartment. Analyzed the variation of the rebar according to the strength of the rebar and the construction cost of the change. Reinforced volume reduction of the apartment building is less than the other. Because, A low wall of rebar reduction is more than 50% of the total. The reason for the previous, Reduction of the quantity of horizontal reinforcement does not appear and Vertical rebar reinforcement than the stress is determined by the placement of rebar in which the upper floor.

In this study, Rebar of SD500, SD600 is applied to the designed or constructed in domestic underground parking. Analyzed the variation of the rebar according to the strength of the rebar and the construction cost of the change. Most of underground parking appear reduction of Rebar ratio. In this case, the load acting on the underground parking garage is large. So, Rebar placing is dominated by element's stress. Therefore, Large amounts material of slabs, beams and foundations are reduced. In case of columns and wall, Ratio of Material reduction is less than former. Because Splice and Anchorage of rebar amounts are increased and Hoop and horizontal rebar amounts are fixed. Percentage of rebar of the column and wall are 15%. So, Showed a less impact on the reduction of total material.

The purpose of this study is to investigate the effects of reinforcement arrangements on the high strength of concrete and to present the quantitative values. To complete this research, two types of concrete strengths (40 MPa and 60 MPa), two types of reinforcing bar diameters (10 ㎜ and 13 ㎜), and seven types of specimens with or without reinforcement arrangements were prepared and tested for compressive strength. As a result, the strength of the cores containing the reinforcement can be predicted to have 82% - 94% of the strength of the cores without reinforcement.

The purpose of this study is to establish a reasonable analytical method for the estimation of overall behavior characteristic from cracking to yielding of rebar and crushing of concrete and seismic performance of reinforced concrete shear wall with high-strength reinforcing bar. A total of 8 specimens of reinforced concrete walls which have constant aspect ratio and a variety of variables such as reinforcement ratio, reinforcement yielding strength, reinforcement details, concrete design strength, section shape and whether lateral restraint hoop were selected and the analysis was performed by using a non-linear finite element analysis program (RCAHEST) applying the proposed constitutive equation by the authors. The mean and coefficient of variation for maximum load from the experiment and analysis results was predicted 1.04 and 8%. The mean and coefficient of variation for displacement corresponding maximum load from the experiment and analysis results was predicted 1.17 and 19% respectively. The analytical results were predicted relatively well the fracture mode and the overall behavior until fracture for all specimens. These results are expected to be used as basic data for application of high-strength reinforcing bar to design codes in the future.

In this study, to evaluate the performance of the sleeve structure for high strength reinforced joints and to develop more economical and practical for high-strength reinforced joints sleeve.

본 연구에서는 보다 자유로운 형상의 슬리브를 만들 수 있는 구상흑연 주철을 이용하여 보다 효과적으로 구조성능을 발휘하면서 SD500 고강도 철근에 적합하게 개발된 모르타르 충전식 슬리브 철근이음을 대상으로 실물크기의 19개 실험체를 제작하여 반복가력실험을 실시하였다. 그리고 강도, 강성, 슬립을 중심으로 한 구조성능에 대하여 본 실험의 주요한 변수에 따르는 영향을 분석하고, 국내기준을 비롯한 주요기준의 요구 성능과 비교하였다. 본 연구결과에서는 SD500 고강도 철근용으로 개발한 모르타르 충전식 슬리브 철근이음은 반복하중이 작용하는 경우에 대하여 국내기준을 비롯한 주요기준에서 요구하는 구조성능을 보유하고 있는 것이 확인되었고, SD500 고강도 철근용 모르타르 충전식 슬리브 철근이음에 대한 구조설계 기준 정립에 필요한 정량적인 기술 데이터를 제시하였다.

본 연구에서는 SD500 고강도 철근에 적합한 강관 스플라이스 슬리브를 개발한 후에 실물크기의 20개 실험체를 제작하여 가력실험을 실시하였다. 그리고 강도를 비롯한 구조성능을 철근의 정착길이, 슬리브의 타입, 철근의 규격과 같은 실험변수에 따른 영향을 분석하고, 국내기준을 비롯한 주요기준에 따라서 비교, 평가하였다. 실험 결과는 SD500 고강도 철근용으로 개발된 강관 스플라이스 슬리브 철근이음은 주요기준에서 요구하는 구조성능을 가지고 있는 것으로 확인되었고 SD500 고강도 철근용 슬리브 철근이음에 대한 구조설계 기준 확립을 위한 기술적 자료를 제시하였다.