PSC STRUCTURE FORMED FROM TRIANGULAR NET ARRANGEMENT, AND CONSTRUCTION METHOD THEREFOR

• Main Author: KIM, Tae Hoon
• Format: Patent
• Language: English; French; Korean
• Published: 18.05.2017
• Subjects: ASSEMBLY OF BRIDGES; BUILDING; BUILDING MATERIALS; CEILINGS; CONSTRUCTION OF BRIDGES; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FLOORS; FOUNDATIONS; GENERAL BUILDING CONSTRUCTIONS; HYDRAULIC ENGINEERING; INSULATION OR OTHER PROTECTION OF BUILDINGS; OR VIADUCTS; ROOFS; SOIL SHIFTING; STRUCTURAL ELEMENTS; UNDERGROUND OR UNDERWATER STRUCTURES; WALLS, e.g. PARTITIONS

The present invention relates to: a PSC structure arranged, in vertical members such as pillars or wall members, which require seismic details, by assembling steel reinforcements or PS steel materials into triangular nets having a triangular structure capable of self-standing; and a preferred construction method therefor. The PSC structure formed from a triangular net arrangement, according to the present invention, comprises: a plurality of triangular nets, each of which is formed by assembling two or three first steel bars, one second steel bar, and a triangular hoop steel reinforcement, and which are arranged in alignment with each other according to the cross-section of a pillar or a wall member; an outer hoop steel reinforcement arranged so as to simultaneously encompass the plurality of triangular nets, which are arranged in alignment to each other, in the traversal direction; and concrete poured such that the triangular nets and the outer hoop steel reinforcement are buried therein; wherein the first steel bars or the second steel bar in the triangular net is prepared from a tensioned and anchored PS steel. The first and second steel bars and the triangular hoop steel reinforcements exhibit restraint stress through the stable triangular structure thereof and are prestressed simultaneously, thereby implementing triaxiality confinement of the concrete and advantageously resisting brittle fracture. Therefore, the PSC structure according to the present invention can increase shear strength and improve seismic capacity. L'invention a trait : à une structure en PSC qui est créée, dans des éléments verticaux tels que des piliers ou des éléments de paroi exigeant des détails sismiques, grâce à l'assemblage d'armatures pour béton ou de matériaux d'acier PS dans des réseaux triangulaires ayant une structure triangulaire autoporteuse ; et à un procédé de construction préféré associé. La structure en PSC constituée d'un agencement de réseaux triangulaires, selon l'invention, comprend : une pluralité de réseaux triangulaires, chaque réseau étant formé grâce à l'assemblage de deux ou trois premières barres d'acier, d'une seconde barre d'acier, et d'une armature pour béton de type cerce triangulaire, et ces réseaux étant alignés les uns sur les autres conformément à la section transversale d'un pilier ou d'un élément de paroi ; une armature pour béton de type cerce extérieure qui est conçue pour englober simultanément la pluralité de réseaux triangulaires alignés les uns sur les autres, dans la direction transversale ; ainsi que du béton coulé de telle sorte que les réseaux triangulaires et l'armature pour béton de type cerce extérieure soient enfouis à l'intérieur de ce béton. Les premières barres d'acier ou la seconde barre d'acier dans le réseau triangulaire sont préparées à partir d'un acier PS sous tension et ancré. Les premières barres d'acier, la seconde barre d'acier et les armatures pour béton triangulaires de type cerce présentent une contrainte d'encastrement dans leur structure triangulaire stable, et elles sont précontraintes simultanément, ce qui permet de réaliser un confinement triaxial du béton et de résister avantageusement à une rupture fragile. Par conséquent, la structure en PSC selon l'invention peut accroître la résistance au cisaillement et améliorer la capacité sismique. 본 발명은 내진상세가 필요한 기둥 또는 벽체 등과 같은 수직부재에서 철근 내지 PS강재를 자립이 가능한 삼각구도의 삼각망으로 조립하여 배근한 PSC구조와 이의 바람직한 시공방법에 관한 것이다. 본 발명에 따른 삼각망 배근에 의한 PSC구조는, 2본 또는 3본의 제1강봉과 1본의 제2강봉 및 삼각띠철근으로 조립 구성되는 것으로 기둥 또는 벽체 단면에 따라 나란하게 배근되는 복수개의 삼각망; 나란하게 배근된 복수개의 삼각망을 동시에 횡방향으로 둘러 감도록 배근되는 외곽띠철근; 삼각망 및 외곽띠철근이 매설되게 타설되는 콘크리트;를 포함하여 구성되되, 삼각망 중 제1강봉 내지 제2강봉이 긴장 정착되는 PS강재로 마련되는 것을 특징으로 한다. 제1,2강봉과 삼각띠철근이 안정적인 삼각 구도로 구속 응력을 발휘함과 동시에 프리스트레스가 도입됨으로써 콘크리트의 3축 구속을 실현하면서 취성 파괴에 유리하게 저항하도록 한 것이다, 이로써 본 발명에 따른 PSC구조는 전단강도를 증대시키고 내진성능을 향상시킬 수 있다.