ダクタルを用いた PC 歩道橋の ... - taisei.co.jp

1 41 (2008) PC Keywords : UFC,Ductal, ultra-high strength, fiber reinforced concrete, bridge, precast segment, wet joint, PBL UFC PBL 1. 200N/mm2 Ultra-high strength Fiber reinforced Concrete; UFC UFC UFC 2000 UFC 2002 UFC 1) 2004 UFC 2 UFC 8 20 50 9 3 UFC 2007 2.

2 180N/mm2 90 C - W/B= -1 1/106 1/300 20 -1 103N/mm2 15mm 2 30-1 41 (2008) -1 2 Table 1 Characteristics of Ductal and conventional high strength concrete 100 200 300 400 500 600 ( kg/m3) ) 20mm) 1 Figure 1 Changes over time in chlorideion concentration 13kg/m3 3.

3 PC 90 C 1 3 157kg 1 ( ) PC 2 50 5 13 2 Figure 2 Relation between member thickness and span 3 2 2 20 PC 1/4 3 1 2 Figure 3 Relation between Ductal quantity per unit area and span 2 N/mm218040 2

4 2 kN/mm25031 50 10-6230 10-6 4 10-171 10-10 cm2/ 1 2 051015202530020406080 2 (m) 8030-2 41 (2008) PC 4 4 Figure 4 Relation between girder height and span 4. UFC -5 =180N/mm2 7cm 8 20cm 8cm -6 PC2 UFC + -6 y =

5 + 0 CL250250 35006307016617681667063020010007030850 30008080 Figure 6 Cross section ( -7) -5 Figure 5 General view of Mikaneike Bridge 81200 39900600100600100 3990019901050010500840084109810840510495 104902000i= 30-3 41 (2008) -7 Figur 4 2 -1 CG -2 Phot -3 e 7 Layout of bridge and pond.

6 2. 2 1 3 -1 2

7 -2 Photo 1 CG at structural study o 2 Curb cover of stainless steel, and balustrade of Aluminumcast metal RC -3 Photo 3 Shape of pier 30-4 41 (2008) 1/20 -5 1/20 -3 -4

8 -3 -4 -5 -5 -5 Photo 5 Front view Photo 5 Front view PC PC 40 1 1/40 40 1 1/40 + 2 + 2 PC PC 4 10,400kN 4 10.

9 400kN 2 7 20 -5 8 10 2 7 20 -5 8 10 -4 Photo 4 Panorama of Mikaneike Bridge 3 30-5 41 (2008) 4 5 36 1)

10 UFC 2) -8 Figure 8 Outline of wet joint PBL -6 -9 PBL 1 3) 4) 2 -10 2 22