Microsoft Word - te_ch9.doc] [
1. (JPCP)
(Dowel Bars)(Joint Spacing) 4.5~6.0 m (15~20 ft)
2. (JRCP)
[] 12~30 m (40~100 ft)
3. (CRCP) 0.5~0.7% Steel (Europe 1.0%)
AASHTO (1986, 1993) 1958-1960 AASHO Road Test 1. (Pavement Serviceability
Rating, PSR) () (Present Serviceability Index, 0~5) (P0)
( P0=4.2, P0=4.5) (Pt) ( Pt=2.5, Pt=2.0) ΔPSI=P0 - Pt 2. () 3. (W18) 18
(8,165 kg) (LEF)
Pt SN ( 12-1, 12-2) LEF(Load Equivalency Factor)=(No. of
18-kip axle to cause ΔPSI)/(No. of x-kip axle to cause the same ΔPSI)=Wt18/Wtx
W18=365*ADT*T%*D%*LD%*TF*((1+g)^n-1)/g Note: TF=(ESAL/Trk) 4. (Mr) Mr(psi)=1500*CBR 5. 6. (Reliability)
80~99.9% 85~99.9%
50~80% S0=0.35~0.45 7.

1. ()
15cm*15cm*75cm (3-point load) 2. , k () 75cm (30 in.) , k=p/Δ, [FL-3] 3. Westergaard 4.
∑ ≤
=
2. ( 12-7) 3. 6%
4. LSF=1.0, 1.1, 1.2 1. 12-8
2. PCAPAV 3. TKUPAV PAS 1993 AASHTO Guide for Flexible & Rigid
Pavement Design (DARWIN Program)

400 80 5


(3)
21% D=50%
LD = 80% 6%
1,000

/1000

/1000
14 150 24 200 16 230 28 85 18 125 32 70 20 15 36 50 22 10 40 60
(a) (b) k = 200 pci
MR= 650 psiLSF = 1.2
(PCA)
AADT=21,000 /
20% D=50%
LD = 80% 5%
1,000

/1000

/1000
14 150 24 200 16 230 28 85 18 125 32 70 20 15 36 50 22 10 40 60
(a)
2.5 4000 psi
400,000 psi, 30,000 psi, 15,000 psi a1=0.44, a2=0.14, a3=0.11 1.0
1993 AASHTO
(a)