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Unformatted text preview: 05120 Name: d . Moe h c_
Civil and Environmental Engineering University of California, Berketey Instructor: J. P. Moehle Examination No. 2 * Work ail problems. * No more than one problem soiution is altcwed on any given sheet. Start new probiems on new sheets.
[)0 not work the sciution for one problem on the back of the sheet of paper for another. * Organize and write solutions neatly. Messy solutions may receive less grading time than would be
required for full understanding. Points will be taken off for messy solutions. * Indicate units in ﬁnal solutions. Points will be taken off if units are missing. * Don’t show more than three signiﬁcant ﬁgures for any solutions. Points may be taken off it solutions
show many more signiﬁcant ﬁgures than are justiﬁed by the basic data in the probiem. * Show at! relevant work. * For ciariﬁcations or any other assistance, approach the exam proctor and ask quietly for assistance.
Do not raise your hand or cail out questions from your seat. * You are allowed two 8—1l2 by 11 inch sheets of notes plus the posted ASCE 7 wind and seismic
provisions for reference. Some useful equations might include the foiiowing: S W
_ ,V a BS ;r/. 20.0443 .rW; may. mm 0.5 U KL]. AT w 11;“ q:= Q‘SIKszle Fr 2 I I p : (1:ch H I:
Z wihl.
i=1 L:L{,[0.25+ 15 ];V—SD'W CE120! Page 2 Problem 1: (25 goints) (a) For the structure shown, under 2 kEf distributed load plus 6 k concentrated load, calculate the vertical
reaction at b (upward being positive).. (b) The same structure as in part (a) is shown, but with simptiﬁed loading (the concentrated load is
removed). Calculate the shear midway between points b and c. CE 1201 Page 3 Problem 2 (25 points) The beam shown supports 2 klf uniformly distributed dead load plus 3 klf live load plus a concentrated live load of 10 kips. Calculate the maximum positive moment possible midway between points b and c.
er‘w LL W 72 ‘ A: M Ll:
) CE 120! Page 4 Problem 3 (25 points) A ﬁveestory reinforced concrete building has
two bays in one direction by two bays in the
other direction. Columns are all 12 inches
by 12 inches in cross section, slabs are all
six inches thick, and there are no beams
(this is called a fiatwplate system). In
addition to self weight (assume concrete
density of 150 pct), the floors support 20 psf
dead load (HVAC) plus 40 psf live load
(ofﬁce occupancy). The building is
conﬁgured to have a separate roof
structure, so the top slab level also has the
ofﬁce occupancy loading of 40 psf. (a) Catculate the column axial load at the base of the interior column at a considering
dead load only. (b) Calculate the column axial load at the base of the interior column at a considering
live load only without considering live load
reduction permitted by the code. (c) Repeat part b using the live load reduction permitted by ASCEJ. ' r (0 :7 . _ ; my. G? r /"~
(ct) oil/217’ war?er ’ warms : 4» rare/aw: :3 yaw/J [my — /x/zr A?) (/5? r7» ”‘“ J ' ‘1 x ' \ "  P (5
Ver LION" Ie‘wbp: 7) ; 1., 4%IZ‘: f‘ /,5 l5 :. .rh F" iC_ (j 2* its: was? * 329‘ PF}, f/{JU/ It” DP ' PL 3 r 5 gm?“ : ixzq—n KC) AT 2 5" 2(92: 32390 {1761
lg .\ ﬁﬂ/W ﬁ/HOI I'LOP/ﬂ;F/'7é4’£?/
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p ‘ “35" 019“ set [c ﬂeeﬂfﬁagf CE 120/ Page 5 Problem 4 (25 points) A onestory Smai—Mart buiiding is to
be designed for construction in
downtown Berkeley. The total weight
of the building is 500 kips. Its
occupancy qualiﬁes it for an
importance factor of 1.0. For wind
design, the basic design wind speed
is 85 mph with exposure D. For
seismic design, the important factors
to consider are: Site Ciass C; 8s =
175%g; 81 = 70%9; R = 4; vibration
period T = 0.2 sec. (3) According to ASCE 705, what is the design base shear for wind? (13) According to ASCE 7~05, what is the design base shear for seismic? Ii: — tK Le ‘ is E E c! ’ i" iF'YKlii—bOEXHK i) a Mix (is = 0051:1902”: Lugozsﬂiﬂ“): {gig/Rm;
7L2: : : : is?) Ldlmmﬁerﬁrﬁﬂ
; (/9.z){—oisif0i«i) = 434me »
\jbw ; heir 63/ ,iioomg :. so we
a '“ C ' q z .4 i
)1 V5, /,:is3 J .41 EMT/c Chm CJ ﬂfadk‘ﬁzrm’m; {gatiw 5‘3, 3W 7" ’45
6m— iota: mega): 30f =3 {35,— a 913
V; View {mic/1300) D {a
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i WI} waits/r)
_ isgw (/Mﬁsm’ ‘
an'P/x # ' j “P #6 [C WCV. ﬁ‘ﬂff
i2/I 4/;
.. <7 H—— l " Um; ’ 0:04? Q0; J.. W x io,owii,xeii)@w) 25,7” ...
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