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Found 5 results

  1. Should you design the beams connecting to a shear wall in a two way slab system having beams (both internal and external) incorporating overstrength factor?
  2. Why always Design System Rho and Sds are 1 and 0.5 in etabs 2016. Design > Concrete frame design > View/Revise Preferences. In etabs 9.7.1, Rho valuse is calculated from include special seismic design data option. Sds is easy to calculate but rho is not easy to calculate with hand calculation.
  3. Assalam o alaikum, i m confused whether collectors and chords are only required in Flat plates/slabs or also required in beam slabs? because in beam slab we are having beams at perimeter of every panel and they can act as chords and for diaphragm bending and as collectors at junction of slab to shear wall. Usually, in seismic zone 4, i dont design diaphragm exclusively. i just design it as simple slab and design my beams in SMRF or Dual Frame in etabs. Also i m confused in excerpt from a document stating The Special Seismic Load combination is also indirectly identified in Chapter 18, Section 1809, Foundation Construction – Seismic Zones 3 and 4. 1809.3 Superstructure-to-Foundation Connection. The connection of superstructure elements to the foundation shall be adequate to transmit to the foundation the forces for which the elements were required to be designed. For instance, since Section 2213.5 Column Requirements specifically identifies the Ω0 factor, Section 1809.3 requires the column-to-foundation connection to be designed for a load combination which includes the Ω0 factor. What does it mean? In seismic zone 3 or 4, we need to design foundations for special seismic combos ALWAYS or only if we r having discontinuous system? The full document is also attached. Thanks. OmegaFactorDiscussion.pdf
  4. Dear Friends Salam I need help on the designing of a building structure. I have two existing stories of RC built in 70's. New structure is going to be built on its roof i.e one story. This new extension will be cold-form or hot rolled or mixed. I have some problems in defining EQ data form. How the value of R will be selected for this type of structure. I have RC frame for first two stories and extension structure columns are hot rolled HSS (Hollow Box), trusses are of cold form steel. What do we call this system. In Building Code of Pakistan table 5.13 different structural systems are defined but i could not reach any of them. Regards
  5. As salam alaikum, Dear all I am designing a B+G+5 building, I would like to know which structural system to use for such structure. I have to take overstrength factor value® from UBC-97 code. What are the basic concept to decide structural system. Thanx.
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