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文章编号:
16712
归
4
(ZO]:)
)0700
7-!
07
地
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1
郭大学子
f
Dt
C
自然科学版)
J ournal
of
H unan
UnivcrsilYC
Natural ScÌcnces)
Vo
l.
f12
,
No.
I
.J
u
J.
2 0 1 5
非线性温度梯度作用下水泥混凝土路面力学分析
γ
颜可珍\沈光辉
，
ì;
荐凌云
(湖南大学土木
J.
程学院.湖南长沙
11(082)
摘
要:为合理评价水泥路面温度沿深度方向的非均匀性分布对水泥混凝土板的应力
和变形的影响，利用有限元软件模拟非线性温度梯度荷载;为分析不同程度非线性温度梯度
对板的应力响应引入了非线性温度分布指数.研究结果表明:以线性温度梯度计算非线性温
度梯度应力时，正温度梯度的应力偏大，负温度梯度的应力偏小.非线性温度梯度时板的变
形和线性温度梯度板产生的变形则基本相同.负非线性温度梯度分布时:随着板辱和板弹性
模量的增加，非线性温度梯度对板顶的应力影口向增大;增加地基反应模量可以减小非线性温
度梯皮影响.并通过大量数据回归分析得出负温度梯度时板顶下最大应力计算公式.
关键词:水泥混凝土路面;非线性温度梯度;非线性温度分布指数;温度应力
中图分类号:
U411
文献标识码
:A
Mechanical
Analysis
of
Cement
Concrete
Pavement
on
Nonlinear
Temperature
Profile
YAN
Ke-zhen
T
,
SHEN
Guang-hui
, YOU
Ling-yun
(College
of
Civil
Engineering , H unan U
niv
, Changsha , H unan 410082 , China )
Abstract:
To
evaluate
the
deformation
and
stress
distribution
of
cement-concrete
pavement
und
巳
r
no-u-
niform
temperature
distribution
along
the
depth
direction
,
finite
element
analysis
method
was
used
in
this
research
to
simulate
nonlinear
temperature
gradient
load
,
and
the
nonlinear
temperature
distribution
index
was
adopted
to
repres
巳
nt
the
degree
of
nonlinear
distribution
and
to
evaluate
its
effect
on
stress
distribu
tion.
Models
with
different
nonlinear
temperature
index
parameters
were
constructed.
The
results
indicate
that
,
although
the
d
巳
formation
caused
by
linear
temperature
gradient
models
was
almost
identical
with
that
from
nonlinear
temperature
gradient
models
,
the
linear
temperature
gradient
models
have
overestimated
bottom-up
stresses
and
und
巳
res
1Í
mated
top-down
stresses.
When
the
nonlinear
temperature
gradient
is
negative
,
the
influenc
巳
of
nonlinear
temperature
gradient
on
slab
stress
increases
with
the
increas
巳
of
slab
thickness
and
elastic
modulus.
Besides
,
the
effect
of
nonlinear
temperature
gradient
is
reduced
with
the
in
crease
of
the
base
reaction
module.
What
is
more
,
based
on
the
regression
analysis
of
a
large
database
,
th
巳
formula
of
maximum
t
巳
nsile
stress
of
the
slab
top
was
obtained.
Key
words:
cem
巳
nt-concr
巳
t
巳
slab;
nonlinear
temperature
gradient;
nonlinear
temperature
distribution
index;
temperature
stress
兴
收稿日期
:2014-10
-07
基金项目:国家自然科学基金资助项目
C5127818S
，
õ(808077).
"i
ational
)l
alural
Science
Found
川
ion
of
Chin8(
:ï
/278188
,
50808077)
,
湖南大学"
青年教师成民计划川资助项目，湖南省普通
I~~î
校古"1'--[']-+软师峭养计划资助
Jljll~
作者简介:颜可珍
(1975-)
.刃.湖南桃江人湖南大学教授，
IW
卜
十通讯联系人
.E-rnaìl
飞川
1kz2004
的!
G~'L
c()m
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