Joumal
ofModem
Transportation
Volume
20
, Number 3, September 2012, Page 129-137
Journal homepage:
jm
t.
s
叼阳
edu.cn
真月
E
10'
11.、电
L.'
、1IÞ
1
1l院、,.‘、、
r
OJo
n
、
111)
、
Effects
of
soil profile
and
characteristic
of
exciting force on
propagation
of
ground vibrations
Sunao
KUNIMA
TSU
1\
Yoshihiro
HIRA0
2
, Yasutoshi
KITAMURA
3
1.
lnstitutefor
Geo-Resources and Environment, Nationallnstitute
of
Advanced lndustrial Science and Technology, 1-1-1 Higashi,
Tsukuba, lbaraki, 305-8567, Japan
2.Kob
句
lashi
lnstitute
of
Physical Research, 3-20-41 Higashi-Motomachi,
Ko
归
bunji
,
To
炒
0
,
185-002~Japan
3.
Construction Engineering
R
ω
earch
lnstitute Foundation, 1-3-10 Turukabuto,
Nada-
缸
,
Kobe
,
而
10gO
,
657-0011, Japan
Absíract:
Gr
ound-bome vibrations caused
by
vibration sources such
as
road traffic and construction exhibit complicated
properties during
propagation
仕
om
the
vibration source
to
the inside
of
a building.
1n
the present paper, a numerical analy-
sis
tecm
啕
U
巳
for
the
system
of
vibration
so
旧
ce
and
propagation path of ground vibration
is
developed
in
order
ωsystem
atically determine
the
propagation properties
of
the
vibration
as
part
of
developing a predictive technique
for
exposure
evaluations
by
vibrations
in
tlnee directions
at
receiving points ofvibration
in
the
human body.
First
,也
.e
exciting
forces
in
three directions
for
input
into
the
numerical computation
are
inversely-
巳
stimated
by
using
the
measured acceleration
rec-
ords ofthe measurement points, which
are
near
the
vibration source.
Th
e thin-layered element method
is
used
for
numeri-
cal
computation ofthe ground vibration.
Th
en
,
the
calculation results
for
the
ground vibration obtained
by
using
the
esti-
mated exciting
forc
巳
are
compared with
the
measured results, and
the
influence
of
the
stratified structure
of
the
ground
on
the exciting
force
and
the
propagation properties ofthe ground vibration
are
studied. From these results,
in
a prediction
of
the
ground vibration
in
three directions,
it
is
emphasized that it
is
n
巳
cessary
to
consider
the
influence
of
horizontal exciting
force
, although attention has been paid
to
only
the
vertical exciting
force
for
sirnulating ground vibration.
Key words: ground-bome vibration; vibration source; exciting
force;
由
atified
struc
阳
re;
soil profile
1.
Introduction
T
thk1m
巳
vibrati
…
g
♂伊
μ
阱叫
ul
由刷酬
1
址由蚓刷
lati
创甜
íion
叫叨阴则
6
仿)
朋削
d
…
叩
lation law (1968)
were
established in order to deal
with
the numerous noise and vibration complaints
t
由
ha
创
t
occurred
during the period
of
hi
丑
igh
巳
c
∞
onorm
此
c
growth in
Japan.
The
vibration regulation law targets factories,
road
traffic,
and
cons
仕
uction
sites as vibration sources.
The
regulation standard is regulated
by
the vibration
level (frequency-weighted acceleration level
, uni
t:
dB)
in
the
vertical direction at the site boundary
ofthe
vibra-
tion
source
based
on
the concept
of
regulating the emis-
sion source.
It
has
been
over 35 years since the estab-
lishment
of
the vibration regulation law
and
complaints
often
occur
though the measured vibration level at the
This
pap
巳
r
was presented at the 5th 1ntemational Symposium
on Environmental Vibration
in
Chengdu, China, October
20-
22
, 2011, and recommended
by
the scientific committee
of
the
symposium
to
Th盯
Received Feb.
15
, 2012; revision accepted July. 6, 2012
Corresponding autho
r.
Te
l.: +81-29-861-8289,
Fax:
+81-29-
861-3717
, E-mail:
s.kunima
剖
tsu@a
创
is
剑t.
go队叫
.j
~201
口
2J
见孔
MT.
All rights reserved
doi:
1 0
.3
969/j .issn.2095-087X.20 12.03.002
。
2012
见.fT.
All rights reserved.
site boundary satisfies the regulation level [1-6].
On
the
other hand
, the evaluation
method
and
evaluation value,
such
as noise annoyance, at the place where the
human
body
is exposed to the vibration
were
considered
in
ISO
(ISO 2631-1:1997
and
ISO 2631-2:2003) [7-8]. Accord-
ingly
, research to reexamine the future
ofvibration
regu-
lation
based
on
expos
田
e
evaluation is being ad-
vanced
[9].
Wh
en
the exposure regulation is enforced for build-
ings
, including detached houses, exposure evaluation
by
vibration in three directions is
necessa
可.
In
addition, it
is important to predict with high accuracy the properties
of
the vibration source, the propagation properties
of
the
ground
vibration,
and
the transmission
properties
企
om
the ground to the building.
In
the present study, a tech-
nique
by
which to grasp
both
the properties
of
the vibra-
tion source and the propagation properties
of
the ground
vibration is proposed for
use
along the vibration propa-
gation
path from the vibration source to the building.
The
future goal is
to
develop a prediction
method
for
exposure evaluations
that
consider the transmission
properties
丘
om
the ground to the building.
In
the present study, exciting forces in three direc-
tions for input in numerical computation
of
the
ground