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이환구(Lee Hwan-Koo),김승훈(Kim Seung-Hun),김태수(Kim Tae-Soo),이용택(Lee Yong-Taeg) 대한건축학회 2010 大韓建築學會論文集 : 構造系 Vol.26 No.3
The advantages of void slab were the reduction of self weight, the using void for piping work and the insulation of sound. The using of polystyrene form on flat plate could mix both advantages void slab and flat plate. But the capacity of punching shear resistance on the slab using the polystyrene form with flat plate system was deteriorated at critical section around the column. And the critical section area was varied as the column size and the arrangement of forms. For understanding an effect of void form for punching shear behavior and indicating a fundamental data for design guideline of void flat plate system, this study performed the 3-dimensional nonlinear finite element analysis with ABAQUS. We compared the result from FEA to test and performed the additional variable analysis. From the FEA results, the cracks and load-displacement relationship was analyzed, and the necessity of the estimation for new critical punching shear section was proposed.
김영수(Young Soo Kim),이형석(Hyung Seok Lee),태경(Kyung Tae),최용승(Yong Seung Choi),이환구(Hwan Koo Lee) 대한두경부종양학회 1994 대한두경부 종양학회지 Vol.10 No.1
Chondrosarcomas are uncommon disease that are noted almostly in the pelvis, sternum, long bone. Chondrosarcoma in the head & neck was very rare. It can occur in nearly every bone in the head and neck. Lesion of the maxilla is most frequent site in head and neck region, but temporomandibular joint is rare site. In chondrosarcoma of temporomandibular joint, its danger lies in its local invasiveness and potential to seed into the meninges. Histologically, the tumor exhibits myxoid feature, which must be differentiated from chordoma and chondroid chordoma. The cranial nerve palsies frequently observed with the tumors are related to the anatomical location. Chondroma is a benign tumor that most frequently found in the hand, foot bone, but can be originated in any cartilagenous area of body. When it occurs in one site, it is named as solitary enchondroma, and when it occurs in multiple site, it is named as multiple enchondromatosis. In the head & neck, it may occur in the nasal cavity, nasopharynx, nasal septum, eustachian tube, palate. But chondroma that occur as neck mass is extremely rare. Recently, the authors experienced a case of chondrosarcoma confirmed pathology affecting 35-years-old female presenting mass in left temporomadibular joint and a case of chondroma confirmed pathology affecting 26-years-old female presenting neck mass, left.