CEE 142 REINFORCED CONCRETE DESIGN PROBLEM SET 1 –

cee 142 reinforced concrete design problem set #1 – loads & load combinations p1-1 due 1/12/01; p1-2 due 1/17/01 p1-1 a one-story, si

CEE 142 REINFORCED CONCRETE DESIGN
PROBLEM SET #1 – LOADS & LOAD COMBINATIONS
P1-1 Due 1/12/01; P1-2 Due 1/17/01
P1-1 A one-story, single bay residential building (see below) is to be
constructed in Santa Monica using UBC-97 requirements. Determine the
applied loads (Dead, Live, and Earthquake) based on the information
provided. You will need to keep track of dead, live, and earthquake
loads separately since different load factors are used for each.
Neglect pattern live load effects; however, include live load
reductions.
For earthquake loads, the building is classified as a special moment
resisting frame (SMRF). The site is located within 5 km of a Type A
seismic source (fault) and soil conditions are classified as “stiff”
with a shear wave velocity of approximately 200 m/s.
Use the following information:
1.
Roof and floors consist of 3 inch thick normal weight concrete
slabs
2.
Estimate ceiling covering weight to be 10 psf
3.
Estimate miscellaneous roof materials (insulation, membrane, etc)
as 15 psf
4.
Concrete joists (12” web width and 21” total depth) are spaced 6
ft on center.
5.
Normal weight concrete weighs approximately 150 pcf.
6.
Neglect the self weight of the girder and columns
P1-2 Determine design loads (P, V, and M diagrams) for all members of
a typical interior frame either using hand computations or using
structural analysis software. (apply symmetry as appropriate).
Organize your solution as follows (P, V, and M diagrams):
a.
Dead load only
b.
Live load only (including live load reductions)
c.
Earthquake loads
d.
Use the following load combinations (UBC-97 Section 1612.2.1,
Exceptions: 1 and 2, neglecting the 1.1 multiplier in exception 2;
see also ACI 318-99, Section 9.2):
U = 1.4D + 1.7L
U = 0.75(1.4D + 1.7L)  1.0E When using UBC-97 earthquake loads
U = 0.9D  1.0E When using UBC-97 earthquake loads

C&EE 142 Reinforced Concrete Design Prof. Wallace