- o w

(

LIN

KSL

AB

1r-

8'--

1L

INK

SLA

B<

1

SPA

NA

\V33

x13

0SP

AN

BSP

AN

C

~I-

2A~I

-2'

I.45

'.1

1.45

'.1

1.45

'.1

.L

INK

SLA

BS

AR

ED

EB

DN

DE

DBY

5r.

Figu

re5.

14A

Plan

Vie

wan

da

Cro

ss-S

ectio

nof

the

Thr

eeE

qual

Span

Stee

lBri

dge

(

.I9'

T

Table B.l Creep and Shrinkage Strains (millionths) (From Reference 23)

153

Concrete R...... Strength = 3500 psiAverage PresIress = 600 psi

Relative Hulnidlty= 70'%Volume/Surface Ratio = 1.5 in.

Time, Creep Shrinkagedays

Nonnal weight Ughtweigbt Moist cure Accelerated cure

1 29 43- 16 93 51 76 44 265 65 97 70 437 76 114 93 589 86 127 115 72

10 90 133 124 7820 118 176 204 13630 137 204 258 18040 150 224 299 21550 161 239 329 24360 169 252 354 26670 177 263 373 28680 183 272 390 30290 188 280 403 317

100 193 287 415 329200 222 331 477 4001 Yr 244 363 511 4433 Yr 273 407 543 4865 Yr 283 422 549 495

Final 315 468 560 510