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부착성능이 개선된 TRM 보강 RC 보의 실험적 성능평가
전인근,김승직 한국공간구조학회 2024 한국공간구조학회지 Vol.24 No.1
The paper presents the experimental investigation of RC beams retrofitted with Textile Reinforced Mortar (TRM), featuring enhanced bond capacity. Anchoring systems, including an extension of retrofitting length and the use of chemical anchors, are newly employed to improve the structural performance of the RC beam retrofitted with TRM. For the experimental investigation, a total of seven shear-critical RC beams, with and without stirrups, were designed and constructed. The structural behaviors of specimens retrofitted with the proposed TRM methods were compared to those of non-retrofitted specimens or specimens strengthened with conventional TRM methods. Crack pattern, force-displacement relationship, and absorbed energy were evaluated for each specimen. The experimental results indicate a significant improvement in the shear capacity of the RC beam with the proposed retrofitting method. Therefore, it is concluded that the application of an extended retrofitting length and chemical anchors to the TRM retrofitting method can effectively enhance the bond capacity of TRM, thereby improving the shear performance of RC beams.
파쇄석이 혼합된 뒷채움재 보강토 옹벽의 변위거동에 대한 사례분석
김영묵,전인근 한밭대학교 건설안전기술연구소 2003 건설안전기술논문집 Vol.3 No.-
In order to assess the behavior characteristics and stability of the ribbed steel strip reinforced soil retaining wall using the granite soil included crushed stone as backfill material, a series of the field test construction and monitoring were conducted. Displacement gauges were installed on two site of the reinforced earth wall of the 7.5m height, to obtain displacements of the wall facing during and after construction. For the reinforced earth wall of the 15m height strain gauges were installed in 7 steps to measure displacement of the wall. A step of the reinforcements and the displacement of the reinforce earth body. In the results of monitoring, face horizontal displacements were measured by very small, and its measures were presented to satisfy the allowable criterion for that. From the results of this study, the increment of face displacement and reinforcements strain was measured very little after construction, and it was found that the most of deformations of wall and reinforcements were occurred during construction due to compaction work for backfills. The reason of the satisfied strain behavior in this test site is thought due to the good compaction control for the granite soil with crushed stone that has good friction property.
PC 벽체 수직접합부의 고장력볼트 연결방식 개발 및 실험적 평가
문교영 ( Moon Kyo Young ),김승직 ( Kim Sung Jig ),황원준 ( Hwang Won Jun ),전인근 ( Jeon In Geun ),이장헌 ( Lee Janghun ) 한국구조물진단유지관리공학회 2022 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.26 No.2
본 연구는 PC 벽체 수직접합부의 연성능력 향상을 위하여 개발한 고장력볼트 적용 수직접합부를 소개한다. 개발 수직접합부의 성능을 평가하기 위하여 현재 많이 사용되는 기존 접합부를 포함하여 실험체 설계 및 제작하였으며, 일정한 축력하에 정적반복가력실험을 수행하였다. 실험 수행 후 관찰된 균열 및 파괴양상, 이력거동 및 에너지소산 등을 기준 실험체와 비교하여 성능을 평가하였다. 실험 결과, 개발 수직접합부 적용 PC 벽체의 경우 균열 및 손상 저감과 더불어 연성능력 향상을 통해 취성파괴를 방지하는데 효과적인 것으로 나타났다.