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개인용(個人用) 컴퓨터를 이용(利用)한 사장교(斜張橋)의 구조분할(構造分割) 해석방법(解析方法)
박춘혁,양승현,한채익,박찬교,Park, Chun Hyok,Yang, Sung Hyeun,Han, Jai Ik,Park, Chan Keo 대한토목학회 1994 대한토목학회논문집 Vol.14 No.1
This paper discusses the block method on cable stayed bridge. The block method is one of the structural analysis methods, and it calculates the sectional forces and the displacements by combining results of several sub-structural system after analyzing each divided structure by means of finite element method. The block method has two branches, one is based on the force method and the other is based on the displacement method. We can select one of two methods by considering structural stability of divided structures. The conclusion gives some thoughts about cable stayed bridge analysis using this block method. Those are as follows. First, the results of analysis on divided structural system are consistent with those of analysis on global structural system. Second. saving memory volume of computer, we can analyze the complicated multi-cable stayed bridge on personal computer. 본(本) 논문(論文)은 사장교(斜張橋)를 대상(對象)으로 하여 전체구조를 몇개의 부분구조계로 나눈 후 유한요소법(有限要素法)을 이용하여 각각 해석하고, 그 결과(結果)를 중량(重量)하여 전체구조의 단면력(斷面力) 및 변위량(變位量)을 구하는 구조분할(構造分割) 해석방법(解析方法)에 대하여 논하였다. 해석방법은 응력형(應力型) 구조분할(構造分割) 해석방법(解析方法)과 변위형(變位型) 구조분할(構造分割) 해석방법(解析方法)이 있는데, 두 방법중(方法中)에서 적절한 방법을 선택하여 구조물(構造物)을 해석(解析)할 수 있다. 이 해석방법을 사용하면 컴퓨터의 기억용량(記憶容量)을 절감시켜, 복잡한 다중(多重)케이블 사장교(斜張橋)도 개인용(個人用) 컴퓨터를 사용하여 해석(解析)이 가능하며, 그 결과(結果)는 전체를 분할하지 않고 해석한 결과(結果)와 일치(一致)하여 본(本) 해석(解析) 기법(技法)의 신뢰성(信賴性)을 입증할 수 있다.
직접적분법을 이용한 사장교의 (斜張橋) 내진해석에 관한 연구
박춘혁(Chun Hyok Park),양승현(Seung Hyeon Yang) 한국강구조학회 1991 韓國鋼構造學會誌 Vol.3 No.3
This study is method of earthquake resistant analysis of Cable-stayed Bridge using direct integration method. In the method of the earthquake resistant analysis, considering the girder and the tower as the continuous system, we can apply the method of the response analysis, as replacing the Cable-stayed Bridge with Multi-Masspoint system owns Two-Degree of freedom, next, after setting up kinetic equation of the ground vivration when the earthquake acceleration acts on the horizontal direction and the vertical direction as considering the particularity of system of the Cable-stayed Bridge, and then, get the eigenvalue and eigenvector, using the mass of masspoints and the influence value of deflection when we act unit-load on the girder and the tower Next, we can get actual the response absolute acceleration by the Direct Integration Method when we let the El Centro earthquake wave continue for 5.0 seconds at interval of 0.01 second. Consequently, we can get many sorts of section force by the earthquake load, if we multiplyed the inertia force thinking as the load by statical many sorts of influence value. By the above-mentioned methods of analysis, selecting Jindo Bridge as the model of the numerical analysis, carried out the numerical calculation.
朴春赫 전북대학교 공업기술연구소 1980 工學硏究 Vol.10 No.-
In parallel with large sized and high speeded computer development, an attempt to reduce the work for bridge design relied upon Total System is partially succeeded. But, for the automatic design of bridge by the Total System, there is no guarantee what the optimum design is when the design of structurs is acted under an allowable unit stress design method based on the experiences. Therefore, keeping pace with the times to the optimization research, many workers try to put more rational optimization design into practical use. But decisive success is not yet found except some sectional examples. Under these surcumstances, by using the partial success, and for the practical use of structure design in Korea, in this research it is intended to standardize the optimization method of a skeleton structure in conformity to Korean Road Bridge Code a fter the Truss structures by SLP method.