A Beginner's Guide to ASCE 7-05

Chapter 11 - E: Seismic Loads

© 2007, T. Bartlett Quimby

Section 11.2

Homework

Last Revised: 11/04/2014

Miscellaneous Design Problems

Problem M11.1:  For the wood framed building (light framed bearing walls and shear walls) depicted in Figure M11.1, determine the seismic story shears using the equivalent lateral force method.  The building is a condominium project located in a location with S₁ = 0.478 and S_s = 1.290.  Assume that the building site is classified as Site Class D.  Include 20% of the snow load in the computation.

The gravity loads consist of:

• Exterior Walls Dead Load = 15 psf
• Interior Walls Dead Load = 10 psf
• Roof Dead Load = 20 psf
• Floor Dead Load = 15 psf
• Roof Snow Load = 30 psf

Figure M11.1
Building Structure

Dormitory Design Problem

Problem D11.1:  Determine the story seismic forces on the structure for the directions indicated below.  Use the Equivalent Lateral Force method.  Assume that the structure is sited on an alluvial fan consisting of deep gravels with a high water table.

• D11.1a:  North/South direction
• D11.1b:  East/West direction

House Design Problem

Problem H11.1:  Determine the story seismic forces on the structure for the directions indicated below.  Use the Equivalent Lateral Force method.  Assume that the structure is sited on a rock outcropping where the shear wave velocity has been determined to be 3,200 ft/s.  The building is located in Alaska at 61^o 20' 52" North, 149^o 32' 21" W.  For the purposes of this problem, assume:

Roof Snow Load = 40 psf
Roof Dead Load = 18 psf
2nd Floor Dead Load = 15 psf
Exterior Wall Dead Load = 15 psf
Interior Wall Dead Load = 8 psf

• H11.1a:  North/South direction
• H11.1b:  East/West direction