土木学会構造工学論文集(2011.3)

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1 Vol.57A (11 3 ) RC Consecutve falling-weight impact test of large-scale RC girders under specified total input-impact energy * ** *** **** ***** Norimitsu Kishi, Hisashi Konno, Satoru Yamaguchi, Hiroshi Mikami, Miho Tamaki * ** ( ) *** **** ( ) ***** In order to establish a performance-based impact resistant design procedure for reinforced concrete structures, consecutive falling-weight impact loading tests were conducted under specified total input-impact energy. In this experiment, the girders have rectangular cross section of 1 m width and depth, and 8 m clear-span length. A 2, kg steel weight was used and total inputimpact energy was specified as 196 kj. Three kinds of falling height of weight were set: 3.33 m; 5 m; and m. From this study, following results were obtained: (1) maximum and residual deflections were almost constant values for each input-impact energy; (2) deflections after the final loading were almost the same among all girders; and (3) accumulated residual deflections were proportional to the accumulated input-impact energy and the damage of the girder for each limit state can be precisely evaluated by means of this relationship. Key Words : RC girder, consecutive impact loading, input-impact energy, maximum deflection, residual deflection, accumulated residual deflection : RC 1. 1),2) RC RC 3) RC 4) RC --

2 12mm C L P P : R=R-1+R-2 : D-1 D-6 : D-1 D-2 D-3 D-4 D-5 D-6 9 4@125 = , 5 R-1 D25 8, R-2 5 9, , 16 (mm) 1 RC RC 5) 6) 7) 8) RC RC 9) RC ) 11) RC 1 p t a/d P usc (kn) V usc (kn) α , (MPa) (GPa) ν c σ y (MPa) E s (GPa) ν s D13 SD D25 SD RC 2.1 RC 1m 1m 8m 1 RC.42 %D % D

=2.28 12 mm P R D-1 mm D-2 D-6 1 RC P usc V

2 2, kg RC (b) 2 1 1m 97 cm 8 cm RC 2(a) 2(b)

3 4 H(m) E(kJ) G G G (a) 1 mm 1/2 D13 25 mm 1 α = mm P R D-1 mm D-2 D-6 1 RC P usc V usc 12) α = V usc /P usc > , kg RC (b) 2 1 1m 97 cm 8 cm RC 2(a) 2(b) 5 mm kj G m 3 G2 5m 2 G3 m m P R D i (i = 1 6) 1kHz 1, G -17-

4 1kHz 1,5 kn 9 Hz mm.1 ms.5 ms (a) 25 ms 5ms H = m G MN G2 2 1 G1 3 3 G2 2(b) H = 5m m G2/3 H = 3.3mG1 ms 1 2(c) H = 5m G D-1 G1/2,, G3--1 G

5 (MN) (MN) (MN) (MN) D-1 D-2 D-3 D-4 D-5 D (mm) (mm) (MN) G (ms) (a) (MN) 8 G G (ms) (b) (mm) (ms) (c) H = 3.33 m G H = 5m G2 H = 3.33 m G

6 (a) G1 (a) G1 (b) G2 (b) G2 G3--1 G3--1 (c) G3 (c) G3 3 4 H = 3.33 m 2 H = m G3 G1 G X E = 196 kj X

7 13.5 (MN) (MN) G3--1 G3--1 (a) (b) 5 (mm) 6 3 (mm) 6 3 (mm) 6 3 G3--1 G3--1 G3--1 (a) D-1 (b) D-2 (c) D (mm) 3 (mm) 3 3 G3--1 G3--1 (mm) G3--1 (a) D-1 (b) D-2 (c) D

8 3.5 6, 7 D-1 D-3 ) E = 196 kj,, G3--1 D-1/3 G1 G2 G3 D-2 E = 196 kj D-1 D-3 RC 3),4) α def =.387E, α rs =.2E α def α rs mm/kj E kj 4) α rs = 4β/P usc (1) β =.288 lnr M (2) W : (kg) B : (kg) r M W/B β r M α rs r M =.4 P usc = 6 kn α rs =.216 (α def /α rs ) D-1 D RC RC 8m RC 2, kg 196 kj 3.33 m 5 m

9 5 5 5 (mm) 3 (mm) 3 (mm) 3 G3--1 G3--1 G3--1 (a) D-1 (b) D-2 (c) D-3 8 G3--1 G (mm) 3 (mm) 3 (mm) E (kj) E (kj) E (kj) (a) D-1 (b) D-2 (c) D-3 9 (mm) 6 3 G3--1 (mm) E (kj) E (kj) E (kj) (a) D-1 (b) D-2 (c) D-3 (mm)

10 m 3, 2, 1 1) 2) 3) 4) 5) 1) ) RC No. 647/I-51, pp ,. 3) RC Vol. 53A, pp , 7. 4) RC Vol. 54A, pp , 8. 5) RC Vol. 55A, pp , 9. 6) Vol. 29, No. 3, pp , 7. 7) Vol. 31, No. 2, pp , 9. 8) Vol. 32, No. 2, pp. 7-7,. 9) RC Vol. 51A, pp , 5. ) RC Vol. 55A, pp , 7. 11) RC Vol. 56A, pp ,. 12) 2 2. ( 9 16 )

技術研究報告第２６号

技術研究報告第２６号 1) 2) 3) 250Hz 500Hz RESEARCH ON THE PHYSICAL VOLUME OF THE DYNAMIC VIBRATION RESPONSE AND THE REDUCTION OF THE FLOOR IMPACT SOUND LEVEL IN FLOORS OF RESIDENTIAL HOUSING Hideo WATANABE *1 This study was