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  • Users: VillegasST
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  1. VillegasST

    Anchor bolts and Base plate

    Colleagues: Another question, what is the main difference for anchor bolt and base plate desing between an ordinary and a ductile desing. Due to the different R value that is used, of course seismic forces are different. But is there any special consideration that must be taken? Thanks!
  2. VillegasST

    Structural Irregularities ASCE 7-10

    Colleagues: What is the consequence of having a building with horizontal irregularities #1a and 2, Table 12.3-1 ASCE 7-10? Seismic design category D. I understand that seismic forces have to be increased for connections to diaphragms and collectors (connections?. Is there any other impact?. I...
  3. VillegasST

    Load combinations ASCE 7-10

    Colleagues: I am not familiar with ASCE 7-10 Minimum Design Loads for Buildings and Other Structures, but I need to make the structural analysis and design of a building according to that document. I undrestand thay I shall use basic load combinations of section 2.3.2 and combination 5 and 7...
  4. VillegasST

    Strange Mode shapes in ETABS

    Colleagues: I am modeling a 6500 m2 footprint building that has 2 levels and one partial basement. Intermediate level is an interstitial structure for cable tray, HVAC ducts, lighting fixture, and piping support. The second level is the roof. This building is a warehouse with a Datacenter...
  5. VillegasST

    Notional Loads AISC 360-05 Appendix 7 Direct Analysis Method

    Colleagues: I am wondering if notional loads should be separated for live and dead loads for load combinations. In addition, should notional loads use corresponding load factor? or a unity load factor shall be used for notional loads? Finally, in a dual system, for example peripherical...

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