ASCE 7-10
ASCE 7-10
(OP)
Hello,
With the load combinations in ASCE 7-10, pls. see below
1. 1.4(D+F)
2. 1.2(D+F) + 1.6L + 0.5(Lr or Sor R) + (0 or 0.9 or 1.6)bH
3. 1.2(D+F) + 1.6(Lr or Sor R) + ((0.5 or 1.0?L or 0.5W) + (0 or 0.9 or 1.6)bH
4. 1.2(D+F) + (0.5 or 1fW + (0 or 1 or 2fFa + (0.5 or 1.0?L + 0.5(Lr or Sor R) + (0 or 0.9 or 1.6)bH
5. 1.2(D+F) + E + (0.5 or 1.0?L + 0.25 + (0 or 0.9 or 1.6)bH
6. 0.90 + (0.5 or 1fW + (0 or 1 or 2fFa + (0.9 or 1.6)bH
7. 0.9(D+F) + E + (0 or 0.9 or 1.6)bH
My questions are the ff;
1.Which one is the basis(for SLS or serviceability limit state) for measuring the total horizontal deflection of a bldg..?
2.Also, with equation 1 to 7, are these all equations should be checked for the ultimate limit state(ULS) design of structural elements(columns, wall, beams,foundations etc.)?
Any ideas will be greatly appreciated.
With the load combinations in ASCE 7-10, pls. see below
1. 1.4(D+F)
2. 1.2(D+F) + 1.6L + 0.5(Lr or Sor R) + (0 or 0.9 or 1.6)bH
3. 1.2(D+F) + 1.6(Lr or Sor R) + ((0.5 or 1.0?L or 0.5W) + (0 or 0.9 or 1.6)bH
4. 1.2(D+F) + (0.5 or 1fW + (0 or 1 or 2fFa + (0.5 or 1.0?L + 0.5(Lr or Sor R) + (0 or 0.9 or 1.6)bH
5. 1.2(D+F) + E + (0.5 or 1.0?L + 0.25 + (0 or 0.9 or 1.6)bH
6. 0.90 + (0.5 or 1fW + (0 or 1 or 2fFa + (0.9 or 1.6)bH
7. 0.9(D+F) + E + (0 or 0.9 or 1.6)bH
My questions are the ff;
1.Which one is the basis(for SLS or serviceability limit state) for measuring the total horizontal deflection of a bldg..?
2.Also, with equation 1 to 7, are these all equations should be checked for the ultimate limit state(ULS) design of structural elements(columns, wall, beams,foundations etc.)?
Any ideas will be greatly appreciated.





RE: ASCE 7-10
1-check ASCE 7-10 page 580 ( commentary appendix c)
the suggested load combinations are:
D + L (CC-1a)
D + 0.5S (CC-1b)
For serviceability limit states involving creep,
settlement, or similar long-term or permanent effects,
the suggested load combination is
D + 0.5L (CC-2)
2-for ULS design check these combinations
CHECK CHAPTER 2
2.3.2 Basic Combinations
Structures, components, and foundations shall be
designed so that their design strength equals or
exceeds the effects of the factored loads in the
following combinations:
1. 1.4D
2. 1.2D + 1.6L + 0.5(Lr or S or R)
3. 1.2D + 1.6(Lr or S or R) + (L or 0.5W)
4. 1.2D + 1.0W + L + 0.5(Lr or S or R)
5. 1.2D + 1.0E + L + 0.2S
6. 0.9D + 1.0W
7. 0.9D + 1.0E