수치해석 모델에 따른 무조인트 교량의 교대 깊이별 거동 비교 = Comparison of Behaviors of Jointless Bridge according to Depth of Abutment Among Numerical Models

다국어 초록 (Multilingual Abstract)

This study investigates the behavior of a jointless bridge that integrates superstructure and abutment without an expansion joint. Based onthe sensitivity analyses conducted in previous studies, a shell-based model was determined to be the most suitable numerical analysis modelfor jointless bridges due to the similarity of the model’s results compared with the obtained displacement shape, which was influenced byrelative errors, precision, and practical aspects. Accordingly, the behavior of a jointless bridge was analyzed at various wall depths using shellelement-based and solid element models. In addition, the results of MIDAS Civil and ABAQUS analysis programs were compared. In the caseof semi-integrated bridges (A and B), the displacement decreased as the wall depth increased due to the ground reaction force in Case 1 undera linear spring condition and +30°C. In the case where temperature was -30°C, the change in displacement was small because the groundreaction did not occur. As for bridge C (a fully integrated alternating bridge) and bridge D (an integrated chest wall alternating bridge), thedisplacement decreased as the wall depth increased at both +30 and -30°C due to pile resistance. As for the comparison between the analysisprograms used, the relative error in Case 1 was small, whereas a significant difference in Case 2 was observed. The foregoing variation ispossibly due to the difference in the application of the nonlinear spring in the programs.

국문 초록 (Abstract)

본 연구는 신축이음장치를 설치하지 않고 상부구조와 교대를 일체화하는 무조인트 교량의 거동해석에 대한 것이다. 선행연구에서는 민감도 해석을 통해 무조인트 교량의 최적 수치해석 모들은 상대오차에 의한 변위 형상의 유사성과 정밀도를 유지하면서 실용적인 shell 요소 기반 모델이 가장 적합한 것으로 판단하였다. 따라서 본 연구에서는 shell 요소 기반 모델과 solid 요소 모델간의 벽체 깊이별 거동 분석을 수행하였다. 또한 MIDAS Civil과 ABAQUS를 사용하여 해석 프로그램간 비교를 하였다. 반일체식 교대 교량인 A교와 B 교의 경우 선형 스프링 조건인 Case 1, +30°C의 경우 지반반력으로 인해 벽체 깊이가 깊어질수록 변위가 감소하였다. -30°C의경우는 지반반력이 작용하지 않으므로 변위 변화가 미소하였다. 완전일체식 교대 교량인 C 교와 흉벽일체식 교대 교량인 D 교의 경우말뚝의 저항력으로 인하여 +30°C, -30°C 모두 벽체 깊이가 깊어질수록 변위가 감소하였다. 해석 프로그램간 비교는 Case 1의 경우 상대오차는 미소하였으나 Case 2의 경우는 차이가 발생하였다. 이는 해석 프로그램에 따른 비선형 스프링의 적용 방식의 차이로 인한것으로 판단된다.

참고문헌 (Reference)

1 노치욱 ; 김승원 ; 이환우 ; 남문석, "민감도 해석을 통한 무조인트 교량의 수치해석 모델 제안" 한국전산구조공학회 34 (34): 255-262, 2021

2 Korea Expressway Corporation Research Institute, "Study on Design, Construction and Maintenance Manuals based on Long-term Monitoring of Integral Abutment Bridges(I)" Korea Expressway Corporation Research Institute 2019

3 "Simulia"

4 Ministry of Land, Infrastructure and Transport, "Road Bridge Design Standards"

5 "MIDAS IT"

6 Korea Expressway Corporation Research Institute, "Improving Performance of Non-Joint Bridges and Research on Jointless of Existing Bridges" Korea Expressway Corporation Research Institute 2016

7 Korea Expressway Corporation Research Institute, "Guidelines for the Design of a Parapet Wall Integral Abutment Bridge" Korea Expressway Corporation Research Institute 2019

8 Korea Expressway Corporation Research Institute, "Design Guidelines for Integral Abutment Bridge" Korea Expressway Corporation Research Institute 2018

9 Korea Expressway Corporation Research Institute, "A Study on the Application of Expansion of Small Bridges in Integral Abutment Bridge with Reinforced Concrete Link" Korea Expressway Corporation Research Institute 2018