SD-Lecture53-Seismic-Codes-3

# SD-Lecture53-Seismic-Codes-3 - CEGCEG-5065C Soil Dynamics...

This preview shows pages 1–9. Sign up to view the full content.

CEG CEG-5065C Soil Dynamics 5065C Soil Dynamics Lecture Lecture 53 53 Seismic Codes California Building Code – Part III In a Problem Format Luis Prieto-Portar 2009

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
List of Symbols. - a p is the in-structure component of the amplification factor. - C a is the seismic response coefficient for proximity. - C p is the horizontal force factor. - C t is a numerical coefficient for the period. - C v is the seismic response coefficient. - F p is total (design or service) lateral seismic force. - F t is the concentrated force at the top of the structure. - h n is defined as the height of the building above the base to the n th level. - I is the seismic importance factor. the near source factor for - N a is the near source factor for C a . - N v is the near source factor for C v . - R is the response modification factor; it reflects the inherent over-strength and global ductility capacity of different lateral-force resisting systems. - R p is the component response modification factor; the horizontal force factor. - S is the soil profile classification, such as, S A , S B , S C , S D , S E and S F ). - T is the fundamental period. - V is the base shear force. - W is the weight of the entire structure (dead + live loads). - Z is the seismic zone influence factor. - o is the seismic force amplification factor. - s is the inter-story drift.
Question #01. For special moment-resisting space frames, what are the values of a p and R p (the in- structure component of the amplification factor, and the total design or service lateral seismic force respectively), for the attachment of suspended ceilings? NB : attachments include the anchorages and the required bracings. A. 1.0 and 3.0. B. 1.0 and 4.0. C. 2.5 and 3.0. D. 2.5 and 4.0.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Answer to #01. A. The CBC Table 16-O gives a p and R p values for elements of the structure, for non- structural components and for equipment. Anchorages for suspended ceilings has an a p value of 1.0 and an R p value of 3.0.
Question #02. You are going to design a billboard structure next to a major highway. The structure will be placed on its own foundation (versus sitting upon another building). What value of the seismic force over-strength factor o should be used? A. 2. B. 3. C. 4. D. 5.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Answer to #02. A. Signs and billboards are known as non-building structures. CBC Table 16-P states that the seismic force over-strength factor o = 2.
Question #03. Non-building structures that are not “rigid structures” and “tanks with supported bottoms” should be designed to resist design seismic forces not less than, A. 0.11 C a I W B. 0.56 C a I W C. 0.70 C a I W D. 3.00 C a W / R

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document