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자료유형
학술저널
저자정보
양근혁 (경기대학교) 문주현 (목포대학교) 변항용 (고려 E&C) 오명호 (목포대학교)
저널정보
대한건축학회 대한건축학회 논문집 - 구조계 大韓建築學會論文集 構造系 第27卷 第6號
발행연도
2011.6
수록면
65 - 72 (8page)

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초록· 키워드

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Six post-tensioned lightweight concrete (LWC) one-way slabs were tested under a symmetrical one-point top loading system. According to tendon profile, the specimens were classified into two groups: S-group for slabs with straight tendons and V-groups for slabs with harped (counter-moment shaped) tendons. The span-to-tendon depth ratio(L/d<SUB>p</SUB>) varied to be 15, 35 and 55 in each group. The flexural cracking moment and ultimate moment of one-way slab tested and stress increase measured in unbonded tendons were compared with those of post-tensioned normal-weight concrete (NWC) beams compiled from the comprehensive database and predictions obtained from the design equations specified in the ACI 318-08 provision. Test results showed that the distribution and width of flexural cracks was significantly affected by the L/d<SUB>p</SUB>, indicating that the larger the L/d<SUB>p</SUB>, the smaller the crack width. On the other hand, tendon profile had a significant influence on deflection and flexural capacity of one-way slabs, showing a smaller deflection and a higher strength in slabs with harped tendons than in slabs with straight tendons. At the same value of reinforcing inde, the flexural cracking moment and ultimate moment of post-tensioned LWC one-way slabs were pretty comparable to those of post-tensioned NWC beams. In addition, flexural strengths and tendon stress increase of post-tensioned LWC one-way slabs could be conservatively predicted by the ACI 318-08 provision.

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Abstract
1. 서론
2. 실험 및 재료특성
3. 실험결과 및 분석
4. 설계기준과의 비교
5. 결론
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