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실내환경과 건설현장 온도변수를 고려한 고력볼트 체결력 예측 KCI 등재

Estimation on Clamping Force of High Strength Bolts Considering Temperature Variable of Both Site conditions and Indoor Environments

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복합신소재구조학회 논문집 (Journal of the Korean Society for Advanced Composite Structures)
한국복합신소재구조학회 (Korean Society for Advanced Composite Structures)
초록

The torque shear high strength bolt is clamped normally at the break of pin-tail specified. However, the clamping forces on slip critical connections do not often meet the required tension, as it considerably fluctuates due to torque coefficient dependent on lubricant affected temperature. In this study, the clamping tests of torque shear bolts were conducted independently at indoor conditions and at construction site conditions. During last six years, temperature of candidated site conditions was recorded from -11℃ to 34℃. The indoor temperature condition was ranged from -1 0℃ to 50℃ at each 10℃ interval. As for site conditions, the clamping force was reached in the range from 159 to 210 kN and the torque value was from 405 to 556 Nㆍm. The range of torque coefficient at indoor conditions was analyzed from 0.126 to 0.158 while tensions were indicated from 179 to 192 kN. The torque coefficient at site conditions was ranged from 0.118 to 0.152. Based on this test, the variable trends of torque coefficient, tension subjected temperature can be taken by statistic regressive analysis. The variable of torque coefficient under the indoor conditions is 0.13%/℃ while it reaches 2.73%/℃ at actual site conditions. When the indoor trends and site conditions is combined, the modified variable of torque coefficient can be expected as 0.2% /℃. and the modified variable of tension can be determined as 0.18%/℃.

목차
1. 서 론
2. 시험 및 측정계획
3. 체결력 결과분석
4. 토크와 토크계수 분석
5. 결 론
References
저자
  • 나환선(한국전력공사 전력연구원 책임연구원) | Nah, Hwan-Seon Corresponding author
  • 이현주(한국전력공사 전력연구원 선임연구원) | Lee, Hyeon-Ju