ETABS MANUAL BOOK DOWNLOADS
ETABS MANUAL BOOK DOWNLOADS
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short description about the book
This manual provides step-by-step instructions for building a basic ETABS model. Each step of the model creation process is identified, and various model construction techniques are introduced. If you follow the instructions, you will build the model.
The Project
The example project is an irregularly shaped four-story building with an external elevator core. The first story is 15 feet high and stories 2, 3, and 4 are each 12 feet high. The bays are 24 feet in the X and Y directions. The lateral force resisting system consists of intersecting moment frames (the elevator core is structurally isolated). The floors consist of 3 inches of concrete over a 3-inch-deep metal deck. The secondary (infill) beams are designed as composite beams. The lateral-force resisting beams that connect the columns are designed as non composite beams. The architect for the building has requested that the maximum beam depth not exceed that of a W18 beam to allow sufficient clearance for ductwork running beneath the beams.
In this Step, wind loads are applied in the X direction to the exterior cladding along grid line A and the developed elevation created in Step 7. Typically, wind pressure coefficients are applied to the vertical surface of a shell object. In such cases, and in this example, a positive wind pressure coefficient applies wind load in the positive local 3-axis direction of the shell object. A negative wind pressure coefficient applies wind load in the negative local 3-axis direction of the shell object. A. Click in the 3D View tab to make that window active. B. Click the View menu > Set Display Options command or click the Set Display Options button, , to access the Set View Options form shown in Figure 42. 1. Select the Object Assignments tab and check the Local Axes check box in the Shell Assignments area to turn on the shell local axes and then click the OK button to exit the form. Red, green and blue arrows display defining the shell object local axes. Recall that Red = 1 axis, Green = 2 axis and Blue = 3 axis.
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PROCEDURE
Click the OK button to close the Lateral Bracing form. E. Click the Design menu > Steel Frame Design > View/Revise Pref- erences command. Select AISC360-10 from the Design Code dropdown list on the Steel Frame Design Preferences form. Click the OK button to close the form. F. In the Plan View, right click on the beam along grid line A between grid lines 1 and 2. The Beam Information form shown in Figure 67 displays. Review the information. Note that the design procedure for this beam is Steel Frame. Click the Cancel button to close the form. G. Click on the title tab of the 3D View to make it active. This allows the design results to appear in the 3D View. H. Click the Design menu > Steel Frame Design > Start Design/Check command or click the Steel Frame Design button, , to start the steel frame design process. The columns and the lateral beams that span between columns are designed. I. When the initial design is complete, a form similar to that shown in Figure 68 displays. Similar to composite beam design (described in Step 12), in the initial analysis, the program used the median section by weight from the AUTOLATBM and A-LatCol auto select section lists for the analysis. The design sections chosen differ from the analysis sections used. The message in Figure 68 indicates that the analysis and design sections are different. 1. Click the No button two times to close the different message
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