Concrete Design · Reference problem

Plated Composite Shear Wall — SpeedCore Example 3-2

An AISC SpeedCore worked example compared at a fixed axial load in Mx–My space.

Open problem in application Download model JSON

Saved model

Problem overview

This case compares a RETUG concreteJS fixed-P M–M result with the AISC plastic-moment point for Example 3-2, a plated composite C-shaped shear wall. The supplied model retains the P = 0 and P = -3,770 kip demand cases so the example can be opened directly in the application.

Fixed-P M–M plot for the SpeedCore Example 3-2 verification
A quick preview of the supplied P = -3,770 kip M–M verification result.
Section
Uncoupled C-shaped SpeedCore wall; 120 in flange length × 480 in wall depth
Concrete
f′c = 6 ksi; 17 in concrete cover regions inside 0.5 in plates
Steel
Fy = 50 ksi; 0.5 in face plates
Verification load
P = -3,770 kips; RETUG Mx and My are plotted at fixed P
Published result
AISC plastic-moment point: Mx = 731,416.67 kip-ft, My = 0
Saved demand checks
P = 0 and P = -3,770 kips, M2 = 734,166.67 kip-ft, M3 = 0

Results

Published vs. computed

119 RETUG M–M angles · 1 AISC point

The supplied RETUG fixed-P result is compared in Mx–My space with the published AISC plastic-moment point. The plotted nominal curve keeps the weak-axis My component visible.

RETUG and AISC fixed-P M–M comparisonRETUG nominal and factored Mx–My curves at P = -3,770 kips with the AISC published plastic-moment point.-829k-494k-159k177k512k847k-169k-112k-55k3k60k117kMx (kip-ft)My (kip-ft)RETUG factored angle 0.00°: Mx 646,274.4 kip-ft; My -33,806.9 kip-ftRETUG factored angle 5.00°: Mx 646,217.2 kip-ft; My -33,765.9 kip-ftRETUG factored angle 10.00°: Mx 646,288.0 kip-ft; My -33,667.8 kip-ftRETUG factored angle 15.00°: Mx 646,178.2 kip-ft; My -33,582.1 kip-ftRETUG factored angle 20.00°: Mx 646,204.5 kip-ft; My -33,502.0 kip-ftRETUG factored angle 25.00°: Mx 646,128.9 kip-ft; My -33,478.5 kip-ftRETUG factored angle 30.00°: Mx 646,099.7 kip-ft; My -33,417.2 kip-ftRETUG factored angle 35.00°: Mx 646,119.9 kip-ft; My -33,258.0 kip-ftRETUG factored angle 40.00°: Mx 642,739.8 kip-ft; My -29,306.0 kip-ftRETUG factored angle 45.00°: Mx 632,081.4 kip-ft; My -17,824.4 kip-ftRETUG factored angle 50.00°: Mx 618,076.9 kip-ft; My -4,926.9 kip-ftRETUG factored angle 55.00°: Mx 601,734.8 kip-ft; My 7,578.1 kip-ftRETUG factored angle 60.00°: Mx 583,478.4 kip-ft; My 19,163.3 kip-ftRETUG factored angle 65.00°: Mx 564,230.2 kip-ft; My 29,060.0 kip-ftRETUG factored angle 70.00°: Mx 540,321.1 kip-ft; My 39,002.0 kip-ftRETUG factored angle 75.00°: Mx 511,946.3 kip-ft; My 47,885.0 kip-ftRETUG factored angle 80.00°: Mx 473,938.6 kip-ft; My 56,250.3 kip-ftRETUG factored angle 82.50°: Mx 445,312.0 kip-ft; My 60,612.9 kip-ftRETUG factored angle 83.75°: Mx 428,470.8 kip-ft; My 62,622.8 kip-ftRETUG factored angle 85.00°: Mx 398,647.3 kip-ft; My 65,550.7 kip-ftRETUG factored angle 85.63°: Mx 378,545.7 kip-ft; My 67,163.6 kip-ftRETUG factored angle 86.25°: Mx 351,918.9 kip-ft; My 69,056.9 kip-ftRETUG factored angle 86.56°: Mx 333,232.1 kip-ft; My 70,211.8 kip-ftRETUG factored angle 86.88°: Mx 306,843.3 kip-ft; My 71,724.0 kip-ftRETUG factored angle 87.19°: Mx 274,620.0 kip-ft; My 73,404.3 kip-ftRETUG factored angle 87.50°: Mx 233,789.7 kip-ft; My 75,277.6 kip-ftRETUG factored angle 88.13°: Mx 159,134.8 kip-ft; My 78,125.0 kip-ftRETUG factored angle 88.44°: Mx 118,319.0 kip-ft; My 79,371.7 kip-ftRETUG factored angle 88.75°: Mx 95,472.0 kip-ft; My 79,901.0 kip-ftRETUG factored angle 90.00°: Mx -2,744.0 kip-ft; My 80,985.5 kip-ftRETUG factored angle 91.25°: Mx -94,555.1 kip-ft; My 79,932.2 kip-ftRETUG factored angle 92.50°: Mx -233,336.1 kip-ft; My 75,309.2 kip-ftRETUG factored angle 92.81°: Mx -274,682.8 kip-ft; My 73,396.0 kip-ftRETUG factored angle 93.13°: Mx -306,768.6 kip-ft; My 71,724.8 kip-ftRETUG factored angle 93.44°: Mx -333,397.7 kip-ft; My 70,210.7 kip-ftRETUG factored angle 93.75°: Mx -352,586.9 kip-ft; My 69,022.6 kip-ftRETUG factored angle 94.38°: Mx -378,558.2 kip-ft; My 67,162.4 kip-ftRETUG factored angle 95.00°: Mx -398,600.6 kip-ft; My 65,527.8 kip-ftRETUG factored angle 96.25°: Mx -428,244.0 kip-ft; My 62,641.3 kip-ftRETUG factored angle 97.50°: Mx -445,181.2 kip-ft; My 60,593.1 kip-ftRETUG factored angle 100.00°: Mx -473,628.2 kip-ft; My 56,296.2 kip-ftRETUG factored angle 105.00°: Mx -511,897.0 kip-ft; My 47,921.9 kip-ftRETUG factored angle 110.00°: Mx -539,589.8 kip-ft; My 39,281.3 kip-ftRETUG factored angle 115.00°: Mx -564,358.8 kip-ft; My 29,088.0 kip-ftRETUG factored angle 120.00°: Mx -583,897.0 kip-ft; My 18,882.3 kip-ftRETUG factored angle 125.00°: Mx -602,031.3 kip-ft; My 7,442.2 kip-ftRETUG factored angle 130.00°: Mx -618,431.6 kip-ft; My -5,196.2 kip-ftRETUG factored angle 135.00°: Mx -632,674.8 kip-ft; My -18,247.0 kip-ftRETUG factored angle 140.00°: Mx -642,973.1 kip-ft; My -29,373.9 kip-ftRETUG factored angle 145.00°: Mx -646,018.0 kip-ft; My -33,306.0 kip-ftRETUG factored angle 150.00°: Mx -646,237.4 kip-ft; My -33,405.2 kip-ftRETUG factored angle 155.00°: Mx -646,266.4 kip-ft; My -33,454.4 kip-ftRETUG factored angle 160.00°: Mx -646,234.7 kip-ft; My -33,520.4 kip-ftRETUG factored angle 165.00°: Mx -646,150.3 kip-ft; My -33,546.9 kip-ftRETUG factored angle 170.00°: Mx -646,220.1 kip-ft; My -33,673.3 kip-ftRETUG factored angle 175.00°: Mx -646,221.5 kip-ft; My -33,760.1 kip-ftRETUG factored angle 180.00°: Mx -646,274.4 kip-ft; My -33,802.7 kip-ftRETUG factored angle 185.00°: Mx -646,203.8 kip-ft; My -33,861.3 kip-ftRETUG factored angle 190.00°: Mx -646,170.5 kip-ft; My -33,942.8 kip-ftRETUG factored angle 195.00°: Mx -646,131.6 kip-ft; My -34,048.2 kip-ftRETUG factored angle 200.00°: Mx -646,204.5 kip-ft; My -34,111.3 kip-ftRETUG factored angle 205.00°: Mx -646,015.6 kip-ft; My -34,166.2 kip-ftRETUG factored angle 210.00°: Mx -646,059.4 kip-ft; My -34,214.4 kip-ftRETUG factored angle 215.00°: Mx -645,970.6 kip-ft; My -34,351.8 kip-ftRETUG factored angle 220.00°: Mx -645,951.3 kip-ft; My -34,407.5 kip-ftRETUG factored angle 225.00°: Mx -645,962.7 kip-ft; My -34,540.1 kip-ftRETUG factored angle 227.50°: Mx -645,789.3 kip-ft; My -34,621.8 kip-ftRETUG factored angle 230.00°: Mx -635,473.0 kip-ft; My -33,993.5 kip-ftRETUG factored angle 235.00°: Mx -607,083.4 kip-ft; My -32,281.8 kip-ftRETUG factored angle 240.00°: Mx -578,148.3 kip-ft; My -30,541.0 kip-ftRETUG factored angle 245.00°: Mx -550,048.2 kip-ft; My -28,924.7 kip-ftRETUG factored angle 250.00°: Mx -519,218.5 kip-ft; My -27,270.4 kip-ftRETUG factored angle 252.50°: Mx -503,181.1 kip-ft; My -26,437.8 kip-ftRETUG factored angle 252.81°: Mx -495,259.3 kip-ft; My -28,574.8 kip-ftRETUG factored angle 253.13°: Mx -486,265.1 kip-ft; My -31,030.4 kip-ftRETUG factored angle 253.75°: Mx -468,855.0 kip-ft; My -35,851.4 kip-ftRETUG factored angle 254.38°: Mx -454,130.3 kip-ft; My -39,294.1 kip-ftRETUG factored angle 255.00°: Mx -437,216.0 kip-ft; My -43,235.2 kip-ftRETUG factored angle 257.50°: Mx -369,760.9 kip-ft; My -56,052.8 kip-ftRETUG factored angle 260.00°: Mx -300,397.9 kip-ft; My -67,307.9 kip-ftRETUG factored angle 262.50°: Mx -229,792.4 kip-ft; My -78,188.2 kip-ftRETUG factored angle 265.00°: Mx -166,994.7 kip-ft; My -85,093.7 kip-ftRETUG factored angle 267.50°: Mx -99,194.3 kip-ft; My -89,520.8 kip-ftRETUG factored angle 268.75°: Mx -63,862.8 kip-ft; My -90,621.4 kip-ftRETUG factored angle 269.06°: Mx -58,788.4 kip-ft; My -90,714.0 kip-ftRETUG factored angle 269.38°: Mx -48,979.6 kip-ft; My -90,842.7 kip-ftRETUG factored angle 269.69°: Mx -35,346.2 kip-ft; My -90,940.2 kip-ftRETUG factored angle 270.00°: Mx -17.1 kip-ft; My -90,976.4 kip-ftRETUG factored angle 270.31°: Mx 35,531.4 kip-ft; My -90,932.5 kip-ftRETUG factored angle 270.63°: Mx 48,989.8 kip-ft; My -90,833.7 kip-ftRETUG factored angle 270.94°: Mx 58,835.8 kip-ft; My -90,711.4 kip-ftRETUG factored angle 271.25°: Mx 63,727.2 kip-ft; My -90,620.1 kip-ftRETUG factored angle 272.50°: Mx 99,389.7 kip-ft; My -89,510.3 kip-ftRETUG factored angle 273.75°: Mx 134,792.2 kip-ft; My -87,580.5 kip-ftRETUG factored angle 275.00°: Mx 166,804.7 kip-ft; My -85,111.5 kip-ftRETUG factored angle 277.50°: Mx 229,697.8 kip-ft; My -78,193.1 kip-ftRETUG factored angle 280.00°: Mx 301,058.8 kip-ft; My -67,169.3 kip-ftRETUG factored angle 282.50°: Mx 369,867.8 kip-ft; My -56,058.2 kip-ftRETUG factored angle 285.00°: Mx 437,040.0 kip-ft; My -43,188.9 kip-ftRETUG factored angle 285.63°: Mx 454,236.2 kip-ft; My -39,170.8 kip-ftRETUG factored angle 286.25°: Mx 467,851.8 kip-ft; My -36,157.8 kip-ftRETUG factored angle 286.88°: Mx 487,707.5 kip-ft; My -30,774.6 kip-ftRETUG factored angle 287.50°: Mx 502,391.2 kip-ft; My -26,575.0 kip-ftRETUG factored angle 290.00°: Mx 519,100.6 kip-ft; My -27,237.7 kip-ftRETUG factored angle 295.00°: Mx 549,976.7 kip-ft; My -28,929.6 kip-ftRETUG factored angle 300.00°: Mx 578,749.9 kip-ft; My -30,615.0 kip-ftRETUG factored angle 305.00°: Mx 607,566.7 kip-ft; My -32,299.4 kip-ftRETUG factored angle 310.00°: Mx 634,784.2 kip-ft; My -33,932.1 kip-ftRETUG factored angle 312.50°: Mx 645,651.7 kip-ft; My -34,650.3 kip-ftRETUG factored angle 315.00°: Mx 645,816.0 kip-ft; My -34,548.1 kip-ftRETUG factored angle 320.00°: Mx 645,912.3 kip-ft; My -34,403.2 kip-ftRETUG factored angle 325.00°: Mx 645,939.7 kip-ft; My -34,335.4 kip-ftRETUG factored angle 330.00°: Mx 646,229.7 kip-ft; My -34,188.9 kip-ftRETUG factored angle 335.00°: Mx 646,120.7 kip-ft; My -34,166.1 kip-ftRETUG factored angle 340.00°: Mx 646,110.2 kip-ft; My -34,105.2 kip-ftRETUG factored angle 345.00°: Mx 646,201.7 kip-ft; My -34,079.7 kip-ftRETUG factored angle 350.00°: Mx 646,247.7 kip-ft; My -33,946.2 kip-ftRETUG factored angle 355.00°: Mx 646,207.7 kip-ft; My -33,866.0 kip-ftRETUG factored angle 360.00°: Mx 646,274.4 kip-ft; My -33,806.9 kip-ftAISC published point: Mx 731,416.7 kip-ft; My 0.0 kip-ftRETUG nominal at 0°: Mx 713,254.4 kip-ft; My -38,193.8 kip-ft

Hover over a point for its values. Use the legend to show or hide a series.

Download comparison dataDownload plot (SVG)

How points are matched. The supplied RETUG fixed-P result is plotted in Mx–My space. The 0° nominal point is compared with the published AISC plastic-moment point at the same target axial load; Mx and My are retained as separate components.

AISC published and RETUG fixed-P M–M values (moments in kip-ft).
PointPublished MxRETUG MxRatioΔ MxDifferencePublished MyRETUG MyΔ My
Plastic moment · P = -3,770 kipsRETUG angle 0.00°731,416.7713,254.497.5%-18,162.22.5%0.0-38,193.8-38,193.8

Difference (%) = 100 × |RETUG − AISC| / |AISC|. Because the published My is zero, a relative My percentage is undefined; the signed My delta is shown instead. Small differences may round to 0.0%.

Comparison notes

  • The AISC design example reports a plastic moment of 8.81 × 10⁶ kip-in, or 734,166.67 kip-ft. The comparison point uses the supplied 731,416.67 kip-ft value shown for the plotted AISC result.
  • The supplied RETUG result has a small nonzero My at 0° because the plated composite wall is unsymmetric about the weak axis.
  • The attached model keeps its two demand cases: P = 0 and P = -3,770 kips, with M2 = 734,166.67 kip-ft. Load cases are preserved in the downloadable JSON for opening in the application.
  • The source request contained 7,314,166.67 in one line; the comparison interprets that as 731,416.67 kip-ft to match the cited kip-in capacity and the supplied plot scale.