360R-06 Design of Slabs-on-Ground
Table A1.2—Allowable distribution loads
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- Điều hướng trang này:
- DESIGN OF SLABS-ON-GROUND 360R-65 Categories 7 through 10 for exceptionally heavy vehicles are not covered in this report. A3.2—Vehicle wheel loading
- 360R-66 ACI COMMITTEE REPORT
| Table A1.2—Allowable distribution loads,
unjointed aisles, uniform loading, and variable layout; PCA method Slab thickness, in. Working stress, psi Critical aisle width, in. * Allowable load, lb/ft 2 At critical aisle width At other aisle widths 6 ft aisle 8 ft aisle 10 ft aisle 12 ft aisle 14 ft aisle Subgrade k = 50 lb/in. 3† 5 300 5.6 610 615 670 815 1050 1215 350 5.6 710 715 785 950 1225 1420 400 5.6 815 820 895 1085 1400 1620 6 300 6.4 670 675 695 780 945 1175 350 6.4 785 785 810 910 1100 1370 400 6.4 895 895 925 1040 1260 1570 8 300 8.0 770 800 770 800 880 1010 350 8.0 900 935 900 935 1025 1180 400 8.0 1025 1070 1025 1065 1175 1350 10 300 9.4 845 930 855 850 885 960 350 9.4 985 1085 1000 990 1035 1120 400 9.4 1130 1240 1145 1135 1185 1285 12 300 10.8 915 1065 955 915 925 965 350 10.8 1065 1240 1115 1070 1080 1125 400 10.8 1220 1420 1270 1220 1230 1290 14 300 12.1 980 1225 1070 1000 980 995 350 12.1 1145 1430 1245 1170 1145 1160 400 12.1 1310 1630 1425 1335 1310 1330 Subgrade k = 100 lb/in. 3† 5 300 4.7 865 900 1090 1470 1745 1810 350 4.7 1010 1050 1270 1715 2035 2115 400 4.7 1155 1200 1455 1955 2325 2415 6 300 5.4 950 955 1065 1320 1700 1925 350 5.4 1105 1115 1245 1540 1985 2245 400 5.4 1265 1275 1420 1760 2270 2565 8 300 6.7 1095 1105 1120 1240 1465 1815 350 6.7 1280 1285 1305 1445 1705 2120 400 6.7 1460 1470 1495 1650 1950 2420 10 300 7.9 1215 1265 1215 1270 1395 1610 350 7.9 1420 1475 1420 1480 1630 1880 400 7.9 1625 1645 1625 1690 1860 2150 12 300 9.1 1320 1425 1325 1330 1400 1535 350 9.1 1540 1665 1545 1550 1635 1795 400 9.1 1755 1900 1770 1770 1865 2050 14 300 10.2 1405 1590 1445 1405 1435 1525 350 10.2 1640 1855 1685 1640 1675 1775 400 10.2 1875 2120 1925 1875 1915 2030 Subgrade k = 200 lb/in. 3† 5 300 4.0 1225 1400 1930 2450 2565 2520 350 4.0 1425 1630 2255 2860 2990 2940 400 4.0 1630 1865 2575 3270 3420 3360 6 300 4.5 1340 1415 1755 2395 2740 2810 350 4.5 1565 1650 2050 2800 3200 3275 400 4.5 1785 1890 2345 3190 3655 3745 8 300 5.6 1550 1550 1695 2045 2635 3070 350 5.6 1810 1810 1980 2385 3075 3580 400 5.6 2065 2070 2615 2730 3515 4095 10 300 6.6 1730 1745 1775 1965 2330 2895 350 6.6 2020 2035 2070 2290 2715 3300 400 6.6 2310 2325 2365 2620 3105 3860 12 300 7.6 1890 1945 1895 1995 2230 2610 350 7.6 2205 2270 2210 2330 2600 3045 400 7.6 2520 2595 2525 2660 2972 3480 14 300 8.6 2025 2150 2030 2065 2210 2480 350 8.6 2360 2510 2365 2405 2580 2890 400 8.6 2700 2870 2705 2750 2950 3305 * Critical aisle width equals 2.209 times the radius of relative stiffness. † k of subgrade; disregard increase in k due to subbase. Notes: Assumed load width = 300 in.; allowable load varies only slightly for other load widths. Allowable stress = 1/2 flexural strength. DESIGN OF SLABS-ON-GROUND 360R-65 Categories 7 through 10 for exceptionally heavy vehicles are not covered in this report. A3.2—Vehicle wheel loading This example selects the thickness of the concrete slab for a vehicle in design index Category IV (noted as Design Index 4 in Fig. A2.1—Subgrade and slab stiffness relationship, used with WRI design procedure. Fig. A2.2—Wheel loading design chart used with WRI procedure. Fig. A2.3—Slab tensile stress charts used with WRI design procedure. 360R-66 ACI COMMITTEE REPORT Fig. A3.1). A knowledge of the vehicle parameters is needed to select the design index category from Table A3.1 . Use of the design chart is illustrated by assuming the following: Loading: DI IV ( Table A3.1 ) Materials: concrete Modulus of elasticity E = 4000 ksi Modulus of rupture = 615 psi (28-day value) Modulus of subgrade reaction k = 100 lb/in. 3 Solution: required thickness = 6 in. is determined from the design chart (Fig. A3.1) by entering with the flexural strength on the left and proceeding along the solid line. tải về 2.35 Mb. Chia sẻ với bạn bè của bạn:
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