A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
BRIDGE PC FLOOR SLAB PROVIDED WITH FIBER-REINFORCED CONCRETE
To provide a bridge precast PC floor slab that reduces the manufacturing cost of a member by reducing the thickness of fiber-reinforced concrete formed on the tension side of a precast concrete floor slab member and eliminating the need for the arrangement of reinforcing bars; and which can provide high strength floor slabs.SOLUTION: A bridge floor slab composed of floor slab members 1 comprising a lower cross section 1a formed of fiber-reinforced concrete having a prescribed thickness and an upper cross section 1b formed of high-strength concrete, and being arranged side by side, in which pretensioning prestress is introduced to the upper cross section of the floor slab members 1 by a tension steel member 6b in the direction perpendicular to the bridge axis; and prestress is introduced to the floor slab members 1 in the bridge axis direction by a post-tensioning system by tension fixing a PC steel 6a, then integrating with the floor slab members 1 by pressure bonding. Thus, obtaining a bridge precast PC floor slab in which bidirectional prestress is applied to the entire cross section of the floor slab, with said entire cross section of the floor slab being unreinforced.SELECTED DRAWING: Figure 1
【課題】プレキャストコンクリート床版部材の引張側に形成する繊維補強コンクリートの厚さを薄くすると共に鉄筋の配筋を不要とすることによって部材の製造コストを低減し、かつ、高強度の床版を得ることができる橋梁のプレキャストＰＣ床版を提供する。【解決手段】下部断面１ａが所定の厚さの繊維補強コンクリートで形成され、上部断面１ｂが高強度コンクリートで形成された床版部材１が並設された橋梁の床版であって、床版部材１の上部断面において橋軸直角方向にはプレテンション方式のプレストレスが緊張鋼材６ｂによって導入されており、橋軸方向においてはＰＣ鋼材６ａの緊張定着によるポストテンション方式よって床版部材１にプレストレスが導入されると共に圧着接合で床版部材１が一体化してあり、床版の全断面に２方向プレストレスが付与されており、かつ、床版全断面が無筋とした橋梁のプレキャストＰＣ床版。【選択図】図１
BRIDGE PC FLOOR SLAB PROVIDED WITH FIBER-REINFORCED CONCRETE
To provide a bridge precast PC floor slab that reduces the manufacturing cost of a member by reducing the thickness of fiber-reinforced concrete formed on the tension side of a precast concrete floor slab member and eliminating the need for the arrangement of reinforcing bars; and which can provide high strength floor slabs.SOLUTION: A bridge floor slab composed of floor slab members 1 comprising a lower cross section 1a formed of fiber-reinforced concrete having a prescribed thickness and an upper cross section 1b formed of high-strength concrete, and being arranged side by side, in which pretensioning prestress is introduced to the upper cross section of the floor slab members 1 by a tension steel member 6b in the direction perpendicular to the bridge axis; and prestress is introduced to the floor slab members 1 in the bridge axis direction by a post-tensioning system by tension fixing a PC steel 6a, then integrating with the floor slab members 1 by pressure bonding. Thus, obtaining a bridge precast PC floor slab in which bidirectional prestress is applied to the entire cross section of the floor slab, with said entire cross section of the floor slab being unreinforced.SELECTED DRAWING: Figure 1
【課題】プレキャストコンクリート床版部材の引張側に形成する繊維補強コンクリートの厚さを薄くすると共に鉄筋の配筋を不要とすることによって部材の製造コストを低減し、かつ、高強度の床版を得ることができる橋梁のプレキャストＰＣ床版を提供する。【解決手段】下部断面１ａが所定の厚さの繊維補強コンクリートで形成され、上部断面１ｂが高強度コンクリートで形成された床版部材１が並設された橋梁の床版であって、床版部材１の上部断面において橋軸直角方向にはプレテンション方式のプレストレスが緊張鋼材６ｂによって導入されており、橋軸方向においてはＰＣ鋼材６ａの緊張定着によるポストテンション方式よって床版部材１にプレストレスが導入されると共に圧着接合で床版部材１が一体化してあり、床版の全断面に２方向プレストレスが付与されており、かつ、床版全断面が無筋とした橋梁のプレキャストＰＣ床版。【選択図】図１
BRIDGE PC FLOOR SLAB PROVIDED WITH FIBER-REINFORCED CONCRETE
繊維補強コンクリート部を設けた橋梁ＰＣ床版
KUROSAWA RYOHEI (author)
2019-09-12
Patent
Electronic Resource
Japanese
| European Patent Office | 2016
Structural Deep Slab Bridge with Fiber Reinforced Concrete
| TIBKAT | 2013