지하박스 구조물의 온도변화 및 건조수축으로 인한 신축이음길이 산정에 대한 연구

Abstract

콘크리트 구조물의 온도변화, 기초의 부등침하 등으로 생기는 균열을 방지하기 위하여 설치하는 신축이음(Expansion Joint)은 구조물이 서로 접하는 양단부를 절연시켜 필요에 따라 이음재, 지수판 등을 설치하며, 설치간격은 일반적으로 20~30m을 적용하고 있다. 지하차도와 같은 차량이 통과하는 지하구조물에 있어 신축이음은 차량의 주행성저하, 누수 및 하자발생의 주요원인이 되고 있어 신축이음을 최소화할 수 있다면 가능한 줄이는 것이 대안으로 여겨지나, 이에 대한 명확한 규정이 문헌과 시방규정에 구체적으로 명시되어 있지 않는 실정이다. 이에 최근에 설계된 지하차도에 적용한 신축이음 간격에 대한 사례조사와 도로교설계기준, 콘크리트구조설계기준 및 도로설계편람(지하차도편) 등의 시방규정에 대한 조사 및 관련기관의 설계지침분석을 통해 지하콘크리트 박스구조물에 있어 온도변화 및 건조수축으로 인한 신축이음 간격에 대해 정량적인 수치해석으로 접근코자 하였다. 본 연구는 실제 설계에 반영된 지하차도에 대한 열응력 해석자료를 분석해서 응력분포와 변위의 분포를 분석할 수 있었으며, 추가로 형상별 2련, 3련 지하박스 구조물의 온도응력의 이력분포를 비교하여 차이점을 확인할 수 있었다. 또한 일반적으로 하절기의 온도응력의 차이가 많이 발생할 것으로 판단되었으나, 지중구조물에 있었서는 오히려 동절기에 상대적인 응력의 변화폭이 더 크게 나타났다는 결론을 얻을 수 있었다. |Expansion Joint of concrete structures are installed to prevent cracks that occurred by temperature change and the unequal subsidence of foundation. how to install Expansion Joint, isolate of the ends of concrete structures and insert materials(dowel bar, water proof material, etc), also apply the installation interval is typically 20 to 30m. Underground road to traverse the underground structures in newly built Expansion Joint, let the vehicle's Trafficability degradation, leaks, and being a major cause of defect, this newly built, Expansion Joint if you can minimize the possible considered or, as an alternative to reduce this and clear regulations for the specs is not specifically stated in the regulations. Recently designed and built the installation interval of Expansion Joint applied underground road for case investigation and analysis and design of concrete road bridge design standards, standards and road design handbook structure (underground road) for research, such as regulations related organizations with the design guidelines. In addition to temperature changes and shrinkage, and analyze the effects arising from the installation interval of Expansion Joint for new construction of quantitative numerical analysis. This study is reflected in the actual design and thermal stress analysis for underground road analysis and stress distribution and displacement and analyzed the distribution of a history of distribution of temperature stresses of the 2-lane & 3-lane types of underground concrete box structures to determine the differences. In General, the difference in temperature during the summer will cause a lot of stress, but rather in the underground box concrete structures were in relative change of stress in winter is compared to a larger; Expansion Joint of concrete structures are installed to prevent cracks that occurred by temperature change and the unequal subsidence of foundation. how to install Expansion Joint, isolate of the ends of concrete structures and insert materials(dowel bar, water proof material, etc), also apply the installation interval is typically 20 to 30m. Underground road to traverse the underground structures in newly built Expansion Joint, let the vehicle's Trafficability degradation, leaks, and being a major cause of defect, this newly built, Expansion Joint if you can minimize the possible considered or, as an alternative to reduce this and clear regulations for the specs is not specifically stated in the regulations. Recently designed and built the installation interval of Expansion Joint applied underground road for case investigation and analysis and design of concrete road bridge design standards, standards and road design handbook structure (underground road) for research, such as regulations related organizations with the design guidelines. In addition to temperature changes and shrinkage, and analyze the effects arising from the installation interval of Expansion Joint for new construction of quantitative numerical analysis. This study is reflected in the actual design and thermal stress analysis for underground road analysis and stress distribution and displacement and analyzed the distribution of a history of distribution of temperature stresses of the 2-lane & 3-lane types of underground concrete box structures to determine the differences. In General, the difference in temperature during the summer will cause a lot of stress, but rather in the underground box concrete structures were in relative change of stress in winter is compared to a larger