cee120-spring08-mt2-Moehle-soln

cee120-spring08-mt2-Moehle-soln - 05120 Name: d . Moe h c_...

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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’£?/ JQ : “f " _ O 2 Q‘?‘ l *SBtFo p ‘ “35" 019“ set [c fleeflffiagf CE 120/ Page 5 Problem 4 (25 points) A one-story 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 7-05, 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 __-, l I ; J§O 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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cee120-spring08-mt2-Moehle-soln - 05120 Name: d . Moe h c_...

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