For the ordinary steel moment frame (R = 3.5) structure shown, calculate the equivalent seismic loads that should be applied at all levels (F2, F3, and Froof). The structure will be used as an office building and will be located in Atlanta, Georgia (latitude = 33.75°, longitude = −84.39°) where the soil type is classified as a type D.

I. Single choice questions  1 . Among the following factors, which determines the level of the seismic action ( )○1 mass of building；○2 seismic site intensity；○3 dynamic property of building；○4 building grade（A）○1○4 ； （B）○2○3○4 ； （C）○3○4 ； （D）○1○2○32. It is assumed that the fundamental period of reinforced concrete frame structure is located between Tg~5Tg of acceleration design response spectrum. How the fundamental period of structure T1 and bottom horizontal seismic action Fek would change, if the contribution of infilled wall to structural stiffness is considered during structural analysis?（A）T1↓, Fek↑ （B）T1↑, Fek↑ （C）T1↑, Fek↓ （D）T1↓, Fek↓3. The purpose of restricting depth to width ratio of multi-storey masonry building is to ( )（A） avoid shear damage to building（B） avoid global bending damage to building（C） avoid differential settlement of building（D） reduce global stiffness of building4. Which of the following is not a common seismic failure to frame beams: ( )（A） Oblique…

It is known that creep coefficient for loading at the age of 7 days and 28 days are 2.2 and 1.6 respectively. Creep coefficient at the age of 15 days would be. (Accurate to three decimal places.)

Use the ASCE 7 equations for building vibration period and base shear and calculate the design base shear for the following building. Building information: Building height:Location:Function:Total building weight:Structural system: 160-ft tallSanta Monica, CA (Seismic Design Category E)Hospital (Importance factor, I =1.5)7,400 kipsSteel eccentrically braced frame (R= 8)