강박스거더교의 응력보정계수에 따른 내하력 평가

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When a load is applied to a structure, a displacement occurs. There exists a stiffness equation between the load and the displacement. The relationship between the load and the displacement can be defined as the stiffness. In this study, the stiffness by applying linear springs and rotary springs is defined, and the structural model similar to the actual behavior characteristics is generated by applying the actual data obtained from the load test to the stiffness equation.
In single beam, the response ratio of conventional method is 1.570∼1.718, whereas the response ratio of the model with vertical spring and rotating spring is 0.934∼1.056, which is effective to show the actual behavior characteristics.
This study is applied to a model that uses stiffness by linear springs and rotary springs considering a common bridge as a grid beam. The response ratio was the largest at 1.090∼1.255 in the conventional method, 0.891∼1.054 in the linear spring model and 0.770∼0.952 in the rotary spring model. In the conventional method, the basic load bearing capacity is small and the stress modification factor is large. However, when the spring force is considered, the basic load bearing capacity is large and the stress modification factor is small. In the safety evaluation, results similar to the load bearing capacity were obtained.
The ultimate goal of design is to have the same design value as the measured value. If the actual behavior characteristics are described as much as possible in the structural analysis, the reliability of the load carrying capacity or safety evaluation determined from the structural analysis results is improved.
Alternative Title
Assessments in the Load Carrying Capacity of Steel Box Girder Bridges According to the Stress Modification Factor
Alternative Author(s)
Cho, Yeon Woo
조선대학교 대학원
일반대학원 토목공학과
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Table Of Contents
제 1 장 서 론 1
1.1 연구배경 및 목적 1
1.2 연구동향 2
1.3 연구방법 4

제 2 장 교량의 재하시험 및 내하력 평가 7
2.1 국내 도로교량의 현황 7
2.2 교량의 정밀안전진단 11
2.3 내하력 및 안전성 평가 13
2.3.1 외국의 공용내하력 평가 13
2.3.2 우리나라의 공용내하력 평가 16
2.3.3 안전성 평가 20
2.4 재하시험 21
2.5 내하력 평가시 문제점 24

제 3 장 강성방정식을 이용한 거동특성 분석 30
3.1 판구조 및 보요소의 기본방정식 30
3.2 강성방정식 37
3.3 단일보요소의 휨거동특성 45
3.4 격자보요소의 적용 63

제 4 장 현장실험 및 적용 75
4.1 강박스거더교 1 75
4.1.1 내하력평가 내용 75
4.1.2 연직스프링계수에 의한 강성도 적용모델 85
4.1.3 회전스프링계수에 의한 강성도 적용모델 93
4.1.4 결과 분석 101
4.2 강박스거더교 2 103
4.2.1 내하력평가 내용 103
4.2.2 연직스프링계수에 의한 강성도 적용모델 112
4.2.3 회전스프링계수에 의한 강성도 적용모델 118
4.2.4 결과 분석 124
4.3 연구결과 분석 및 고찰 125

제 5 장 결론 127
조선대학교 대학원
조연우. (2016). 강박스거더교의 응력보정계수에 따른 내하력 평가.
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General Graduate School > 4. Theses(Ph.D)
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