Figure 2.21 SAP2000 model of entire WTC 7 without roof

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Figure 2.21 SAP2000 model of entire WTC 7 without roof.

After the entire WTC 7 was modeled in SAP2000, boundary conditions for Floors 12 and 13 assembly were modeled. We modeled Floor 12 and Floor 13 using both ABAQUS and SAP2000. A significant effort was made to model the building connections so that we could properly account for the boundary conditions and properly use “substructuring” to accelerate the computer analysis time. Figure 2.22 shows the model for Floor 12 to Floor 47. Figure 2.23 shows the model for Floor 3 to Floor 12.

Figure 2.21 SAP2000 model of entire WTC 7 without roof

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Figure 4.20 Velocity comparison between Chandler measurement (green plotted line) and UAF simulation (red plotted line). Bold green trend line illustrates free fall

Figure 4.17 (a) Comparison of simulated collapse to perspective 1; (b) comparison of simulated collapse to perspective 2

2.7 Summary and Conclusion

3.2.2 Girder A2001 Web Stiffeners Prevent Flange Failure and Girder Walk-off

Table 2.3 Comparison of UAF and NIST Modeling

4.6 Results of Core Column/Exterior Column Failure Analysis

2.6.2 ABAQUS Analysis

3.2.3 Lateral Support Beams Prevent Beam Buckling

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University of Alaska Building 7 Report