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No.40
U.D.C 699.844
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* 建築本部 技術部 音響・電磁環境G
U.D.C 699.844
防振地中壁を構成する防振材の振動遮断性能評価方法に関する一考察
貝瀬 智昭＊ 井上 諭＊
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東急建設技術研究所報No.40
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50mm2 1
10 3 4H P01
H P02P03 P04
P02 P035 6
1/3 8 315Hzfast
S/N
10 1
P01 P04
2
1
( ) (N/m/m2)
( ) ( 1 )
(26 )
50 7.8×106 2.4×107
(30 )
50 2.7×107 7.4×107
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P01
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2P02 P03
1 2 7 7 1 8~40Hz
12~25dB 50~125Hz 0 8dB
2 8~125Hz 1~5dB
8 40Hz 10dB 20dB 50125Hz 2dB 5dB
8P03
( P04)9
8
8 40Hz 10~20dB50~80Hz 2dB
963,80Hz 2dB
40Hz
63~80 Hz
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P02
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P03
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1 , No.130 (Vol.34 no.2), pp6-9, 2005.6
2 EPO , No.130 (Vol.34 no.2), pp10-13, 2005.6
3 , No90 (Vol.22 no.2) pp.29-37, 1995.6
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6 , , No.138 (Vol.36 no.2), pp1-8, 2007.6
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A STUDY ON EVALUATION METHOD OF VIBRATION TRANSMISSION LOSS BY
VIBRATION-PROOFING MATERIARL THAT CONSTITUTE VIBRATION ISOLATION TYPE UNDERGROUND WALL
T.Kaise, and S.Inoue
Vibration-proof material that constitute vibration isolation type underground wall is evaluated difference of vibration acceleration level which is measured in each of underground exterior wall after building construction and earth retaining wall before building construction as vibration transmission (Evaluation Method 1) in many cases. Concerning this Method, the finding of a precedent study is showed that the vibration transmission evaluated by Method 1 is overestimated in comparison with how to evaluate difference of vibration acceleration level which is measured simultaneously underground exterior wall and earth retaining wall after building construction as vibration transmission (Evaluation Method 2) . Therefore, we conducted vibration measurement in the implementation field it is intended to confirm the actual phenomena, employing a vibration proof underground walls, to obtain the vibration isolation performance of the evaluation of each method were compared.
As a result, it was considered that the vibration transmission evaluated by Method 1 was overestimated in comparison with Method 2 in proof field as well as the finding of previous study.
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