CALCULATION
OF BENDING MOMENT DUE TO TEMPERATURE CHANGE. PROGRAM
INFO AND LIMITATIONS.
(
Actual program is available in
Super Civil CD ) |
The calculation of bending moment due to temperature change in concrete
wall is based on Reynolds
& Steedman Concrete Hand Book . Please
note that the bending moment due to change
in temperature produces compression on the face subjected to the higher
temperature. This program is applicable
to walls where there is temp. gradient, and not when
there is a uniform raise in temperature.
The
un-cracked depth of concrete shall be given , whenever the design is not
based on
IS 3370 (Code of Practice for liquid
retaining structures). This un-cracked concrete depth is distance
between extreme fiber in compression to neutral axis. In case
the design is based on un-crack section
, the un-crack depth of section will be equal to full depth. Contribution
of reinforcement in calculation of moment
of inertia of un-cracked section is neglected. After getting
the BM. due to temperature change a user has to add this moment algebraically
to other
externally applied BM. |
| The
K, Density, & Temp. Of Various Insulation Materials are
given for reference. |
|
MATERIAL |
DENSITY
(Kg/Cum) |
TEMPERATURE
(Centigrade) |
K-VALUE
( W/M Deg.C ) |
| MILD
STEEL |
7850 |
|
50.000 |
| REINFORCED
CONCRETE |
2400 |
|
1.700 |
| NO
FINES CONCRETE |
2000 |
|
0.900 |
| ENGINEERING
BRICK |
2000 |
|
1.160 |
| FIRE
BRICK |
2200 |
|
1.160 |
| A.R.BRICK |
2000 |
|
0.950 |
| MOLER
BRICK |
720 |
100 |
0.140 |
| MOLER
BRICK |
720 |
200 |
0.160 |
| MOLER
BRICK |
720 |
500 |
0.180 |
| VERMICULITE |
|
100 |
0.090 |
| VERMICULITE |
|
200 |
0.110 |
| VERMICULITE |
|
500 |
0.200 |
| GLASS
WOOL |
12 |
50 |
0.052 |
| GLASS
WOOL |
12 |
100 |
0.073 |
| GLASS
WOOL |
16 |
50 |
0.048 |
| GLASS
WOOL |
16 |
100 |
0.064 |
| GLASS
WOOL |
24 |
50 |
0.043 |
| GLASS
WOOL |
24 |
100 |
0.054 |
| GLASS
WOOL |
32 |
50 |
0.040 |
| GLASS
WOOL |
32 |
100 |
0.052 |
| GLASS
WOOL |
32 |
150 |
0.064 |
| GLASS
WOOL |
48 |
50 |
0.038 |
| GLASS
WOOL |
48 |
100 |
0.046 |
| GLASS
WOOL |
48 |
150 |
0.057 |
| GLASS
WOOL |
48 |
200 |
0.072 |
| GLASS
WOOL |
48 |
250 |
0.090 |
| GLASS
WOOL |
64 |
50 |
0.037 |
| GLASS
WOOL |
64 |
100 |
0.045 |
| GLASS
WOOL |
64 |
150 |
0.054 |
| GLASS
WOOL |
64 |
200 |
0.067 |
| GLASS
WOOL |
64 |
250 |
0.081 |
| MINERAL
WOOL |
120 |
100 |
0.054 |
| MINERAL
WOOL |
120 |
150 |
0.066 |
| MINERAL
WOOL |
120 |
200 |
0.078 |
| MINERAL
WOOL |
150 |
100 |
0.052 |
| MINERAL
WOOL |
150 |
150 |
0.062 |
| MINERAL
WOOL |
150 |
200 |
0.075 |
| MINERAL
WOOL |
200 |
100 |
0.050 |
| MINERAL
WOOL |
200 |
150 |
0.060 |
| MINERAL
WOOL |
200 |
200 |
0.072 |
| PERLITE
LIGHT WEIGHT CONCRETE |
520 |
|
0.126 |
| WOOD
PAR CON |
920 |
|
0.245 |
| AGLITE
LIGHT WEIGHT CONCRETE |
1650 |
|
0.562 |
| FOAMED
SLAG |
1900 |
|
0.577 |
| AUTOCLAVED |
640 |
|
0.165 |
| FOAM
CONCRETE (M) |
290 |
|
0.080 |
| FOAM
CONCRETE (MX) |
1440 |
|
0.550 |
| LECA |
1250 |
|
0.439 |