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MTS(Multe-tee Slab System)공법에서 와이어 매쉬를 적용한 전단보강에 대한 연구
홍성걸(Hong Sung-Gul),김민기(Kim Min-Ki),진언식(Jin Eun-Sik),김은성(Kim Eun-Seong) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
Precast concrete system was developed to rebuild destroyed cities after World WarⅠ(1914~1918). The way of construction, that is members are prefabricated, shortened the construction period than before. Once, It went downhill soon since they began to focus on developing the construction of the high stories buildings. Moreover, connection problems lead the customer's complaints. But nowadays, precast concrete system is applying to parking lot, stadium and big-supermarket to construct them more faster. Especially, double-tee slab system(DTS System) and hollow core slab system have been effectively applied to. But as the scale of recent projects are getting larger, it is necessary to develop the other type of slab systems. Multi-tee Slab System(MTS System) is developed for overcoming the shortages in DTS system and hollow core system that we are currently using. Steel stirrup is widely used for shear reinforcement concrete structure. Recently, but it leads to the usual consequence of higher cost and delay of construction completion. In this paper, wire mesh that substitute the stirrups is studied. We conducted two types of experiments. First we used to wire mesh instead of stirrups and we studied how the location of reinforcing material effects the performance. Second we assessed unit of the MTS for estimating their capacities. In this paper, we predicted that performance and efficiency of this system and reinforcement using the results from the experiments and research.
최현기(Choi Hyun-Ki),김준서(Kim Jun-Seo),최윤철(Choi Yun-Cheul),백영수(Back Young-Soo),진언식(Jin Eon-Sik),최창식(Choi Chang-Sik) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.8
There are many in utilizing the flat plate structure in reinforced concrete building. This structure has drawbacks as well because the structure is vulnerable to a punching shear failure at the column connections. This research is an experimental study on full-scale interior slab-column connections of flat-plate. Three types of shear reinforcements were proposed to prevent brittle punching shear failure that could result in collapse of whole flat plate structures. A series of four flat plate specimens including a specimen without shear reinforcement and three specimens with the reinforcements was tested. The dimension of the slabs was 2620*2725* 180㎜ and the specimens had a 600*800㎜ square column at the center of the slabs. The slabs were tested up to failure using monotonic vertical shear forces. The presences of the shear reinforcements substantially increased punching shear capacity and ductility of the interior slab-column connections.