L-4/T-l/CE Date: 07/12/2014 BANGLADESH UNIVERSITY OF ENGINEERING AND TECHNOLOGY, DHAKA L-4/T-l B. Sc. Engineering Examinations 2012-2013 Sub: CE 411 (Structural Analysis and Design II) Full Marks: 210 Time: 3 Hours USE SEPARATE SCRIPTS FOR EACH SECTION The figures in the margin indicate full marks. SECTION -:.A There are FOUR questions in this section. Answer any THREE. Assume reasonable values for missing data, if any. The symbols carry their usual meaning . .. , 1. Fig. 1 shows a loaded one..story bent with an inclined leg. The relative stiffness value for each member is given in the figure within parentheses. Analyze the structure using moment distribution method and find out end moments. (35) 2. (a) Analyze the beam shovm in Fig. 2 using moment distribution method. Draw bending moment diagram. El is constant. (15) (b) Calculate deformation of the unrestrained degrees of freedom of the plane frame shown in Fig. 3. Use stiffness method. Ignore axial deformation. Given, EI = 10,000 k- ~. ~~ 3. (a) Write down the stiffness equations in matrix form for the beam shown in Fig. 4. Given: E = 3,000 ksi, II = 10,000 in\ h = 7,500 in 4 • (15) (b) Determine bar forces of the truss shown in Fig. 5. Use stiffness method. Areas are given in parentheses. Given, E = 30,000 ksi. . (20) 4. For the plane truss shown in Fig. 6, detemline the nodal coordinate matrix, member connectivity matrix, member property matrix, combined load matrix, member stiffness matrix, global stiffness matrix and modified global stiffness matrix. Given, E = 30,000 ~. ~~ Contd P/2
Transcript
L-4/T-l/CE Date: 07/12/2014
BANGLADESH UNIVERSITY OF ENGINEERING AND TECHNOLOGY, DHAKA
L-4/T-l B. Sc. Engineering Examinations 2012-2013
Sub: CE 411 (Structural Analysis and Design II)
Full Marks: 210 Time: 3 Hours
USE SEPARATE SCRIPTS FOR EACH SECTION
The figures in the margin indicate full marks.
SECTION -:.AThere are FOUR questions in this section. Answer any THREE.
Assume reasonable values for missing data, if any. The symbols carry their usual meaning ... ,
1. Fig. 1 shows a loaded one ..story bent with an inclined leg. The relative stiffness value
for each member is given in the figure within parentheses. Analyze the structure using
moment distribution method and find out end moments. (35)
2. (a) Analyze the beam shovm in Fig. 2 using moment distribution method. Draw bending
moment diagram. El is constant. (15)(b) Calculate deformation of the unrestrained degrees of freedom of the plane frame
shown in Fig. 3. Use stiffness method. Ignore axial deformation. Given, EI = 10,000 k-
~. ~~
3. (a) Write down the stiffness equations in matrix form for the beam shown in Fig. 4.
Given: E = 3,000 ksi, II= 10,000 in\ h = 7,500 in4• (15)
(b) Determine bar forces of the truss shown in Fig. 5. Use stiffness method. Areas are
given in parentheses. Given, E = 30,000 ksi. . (20)
4. For the plane truss shown in Fig. 6, detemline the nodal coordinate matrix, member
connectivity matrix, member property matrix, combined load matrix, member stiffness
matrix, global stiffness matrix and modified global stiffness matrix. Given, E = 30,000
~. ~~
Contd P/2
=2=
CE 411/CE
SECTION-B
There are FOUR questions in this section. Answer any THREE.
5. (a) Analyse the frame in Fig. 7 by the consistent deformation method and draw the
bending moment diagram. (EI = Constant) (29)(b) Show two possible primary (released) structures and redundants for the structures in .
.'
Fig. 8. (6)
6. (a) Find reactions due to a vertical settlement of 6 mm at the support A of the beam in
Fig. 9. E = 200 x 106 kN/m2 and I = 160 x 10-{)m4for the beam. (25)
.(b) For the frame in Fig. 10, draw the qualitative influence lines for (i) maximum +ve
bending moment at P, (ii) maximum negative bending moment at B of the beam BC and
(iii) maximum axial force in column BF. Show the corresponding loading pattern for
uniformly distributed live load for each of them. (10)
7. (a) Compute the force in the tie rod (Fig. 11). Include the effect of both axial and
bending (E is constant). (27)(b) Draw qualitative influence lines for bending moment at B and A, shear force at A
and reaction at B of the continuous beam in Fig. 12. (8)
8. (a) Analyse the truss in Fig. 13 by the consistent deformation method (EA = Constant). (30)
BANGLADESH UNIVERSITY OF ENGINEERING AND TECHNOLOGY, DHAKAI.' , _ ' •
L-:4/T-l B. Sc. Enginee_ring Examinations 2012-2013
Sub: CE 401 (Project Planning and Construction Management)
Full Marks: 280 Time : 3 Hours
.~"'.
USE SEPARATE SCRIPTS FOR EACH SECTION
The figures in the margin indicate full marks .~••~_ •••••__ M'"''''''' '''''''''''' ''' _._ •••••••••••__ •••••••_,., ••••••••••__ •••••_ •••_. ••.. _ ••••_. __ ••••••••••••_._ ••••••__ ••••••••M•••••••.•••••••••••••••• _ ••••••••••.•• _ •••••- •••••••• :••••_ ••••••••••_ ••••••••••••• " •••••__ •••_,-_ •••,••••••••••••
SECTION-A
There are EIGHT questions in this 'section. Answer Q. NO.1 and any FIVE from the rest.
'..1. Answer any five of the following:
(a) - Differentiate between "Forward Planning", "Backward Planning" and "Combined
. Planning".- . .
(b) Define "Optimistic time estimate", "Pessimistic,time estimate" and "Most likely
time estimate".
(5x8=40)
.~.
(c) Explain "Expression of Interest (EO I)". What are the advantages and limitations of
EO I?(d) "Equipment make it possible" - Explain the statement and state the importance of
equipment ih construction.I
(e) Explain "project management cycle".
(f) List the Functions of the following equipment:
(i) Excavator (ii) Asphalt pavers (iii) Road Roller.
(g) What do you understand by "Cost-Slope"? How do you determine it?
2. Figure-lshows the network for a construction project, wit~ the three time estimates:of
each activity marked. Determine
(i) Critical yath and its standard deviation.
(ii) Probability of completion of project in 38 days.
(iii) Time duration that will provide 95% probability of its completion time .• •.• L. •••• '.,_,_ ••••
\
'2- -A 6
Contd P/2
(20)
:1.,.---
=2,=
CE 401/CE
3. (a) Explain the tendering process with a flow diagram. Differentiate between "single"
and litwo stage" tendering.
(b) What are the steps to follow to make a construction site safe? Give some' examples
of personal protective equipments in construction site.
4. The network of a construction project is shown in Figure-2, along with the duration of
each activity. Compute activity time and total Float of each activity. Locate the critical
path on the network.
.._---- ... --~--_.,--".. -~...
R~~-2-. -' ." ' (.. \ - ' -.",."." ,., ~
5. - (a) A construction project consists of 12 activities. The predecessor relationships are
identified by their node numbers as indicated below:
Activity Identification Activity Identification
A (1,2) G (4, 6)
B (2,4) H (5, 6)
C (2,3) I (5, 7)
D (2, 7) J (7, 8) .
E (3,4) K (6,8)
F (3,5) 'I L (8,9)
. Draw the network diagram.
(b) Explain needs for Inspection and Quality Control in construction project. Show the
application of Quality Control Cycle to public works projects.
Contd P/3
(10)
(10)
(20)
(10)
(10)
=3=
CE401/CE
6. Table-l gives the information about various activities of network shown in Figure-3. (20)
Table-l
Activity Normal duration Normal cost Crash duration Crash cost.. (days) (Tk.) (days) (Tk.)
1-2 9 80,000 6 95,000
2-3 5 50,000 . 3 .55,000
CD ;>Q;). . }~-:---c
h'~"r>t-3
The project overhead costs are @ 3,000 Tk./day. Determine (i) direct cost - durationrelationship (ii) total cost - duration relationship and optimum duration and minimumcost.
7. (a) A manufacturer produces two products, X and Y with two machines: A and B. Thecost of producing each unit of X is for machine A : 50 minutes and for machineB : 30minutes. The cost of producing each unit of Y is for machine A : 24 minutes and formachine B : 33 minutes. Working plan for a particular week are: 40 hrs of work onmachine A and 35 hours of work on machine B. The week starts with a stock of30 unitsof X and 90 units of Y, and a demand of 75 units of X and 95 units of Y. How do youplan the production in order to end the week with the maximum stock? Use linear
programming (LP). (10)(b) What are the assumptions made to formulate and solve linear programming model?Differentiate between PERT network and CPM network with diagram (10)
8. (a) The network for a certain project is shown in Figure~4.Determine the expected time
for each path. Which path is critical? (10)
---_.__ ._.
1- 2-- '3
I10-0-0II
(b) What is a milestone chart? How does it differ from a bar chart? Why safety in
construction site is utmost important?Contd P/4
(10)
,I
.\
=4=
CE 401/CE
SECTION -BThere are FOUR questions in this section. Answer any THREE.
Assume reasonable values for missing data.,
9. (a) Define comprehensively the terms "management", "delegation" and "power" and
briefly explain the different schools of thought in management. List the factors in (i)
departmentation and (ii) decentralization. (24)(b) Briefly explain the philosophy underlying the selection of appropriate discount rate
and the length of project period of economic analysis. (22 ~)
What is the yield for a project where $200,000 is invested to produce cash flows of
$50,000; $50;000; $60,000; $60,000; and $44,000 during year 1, 2, 3, 4 and 5respectively? The project has a salvage value of $10,000.
10. State you understanding and classifications of human needs in the context of motivation ..
Discuss the factors in influencing and the guides and methods of disciplining. State the
conditions that foster voluntary co-operation in the organisation and some desirable
important personality characteristics of a manager. (24)(b) Briefly explain the principal differences between the Capital Recovery Factor and
the Annuity Factor. Explain clearly the meaning and implications of Internal Rate of
Return (lRR) of the projects. A piece of new construction equipment will cost $60,000
and will have an expected life of 6 years, with no salvage value at the end of its life. The'annual disbursements for operation, maint~nance, fuel etc are estimated to be $12,000.What is the equivalent uniform annual cost of this piece of equipm'ent if the rate of
interest is 12%? What is the present worth of the disbursements at 12%? (22~)
11. (a) (i) Define clearly th~ term "motivation" and explain the importance of the role of
Civil Engineering Leadership in the government sector. (11). (i) Explain clearly why do we need a Feasibility Report of a project. Also explain
"Project Life Cycle" and the chief distinctions between Economic analysis and
Financial analysis of a project. (12)(b) (i) What are the conflict response alternatives? Narrate advantages and
disadvantages of each conflict resolving styles. (11)(ii) What is the definition of Economic Order Quantity and Inventory Turnover
Ratio? Define safety stock and lead time. (12~)
12. (a) What do you mean by "Golden Hour"? What are the benefits of it and how can you
apply it in "HRM"? Explain "clean break" and "clean focus" with examples in your life. (21 ~)(b) Explain the work types ABCDE with examples in practical life. What are the HRM
functional components and which one is more important? What are the techniques of
conducting effective meeting? (25)
- b-"- -,
Table !L Standard Normal D~stribu.tionFunction &,2-. I,' ,
Z (+,) I Probability (Pr)e~} Z (,-) Probability (P~) (%)
BANGLADESH UNIVERSITY OF ENGINEERING AND TECHNOLOGY, DHAKA,. .
L-4/T-l B. Sc. Engineering Examinations 2012-2013
Sub: CE 441 (Foundation Engineering)
Full Marks : 210 Time: 3 Hours
The figures in the margin indicate full marks .
. USE SEPARATE SCRIPTS FOR EACH SECTION..~._._k' __ ._ .. " """'_"'_""""""..-.- ---- ..-- ", -.-
SECTION-AThere are SEVEN questions in this section. Answer Q. NO.1 and any FIVE fro the rest.
QUESTION NO.1 is COMPULSORY.
1. COMPULSOERY QUESTION: Answer any SEVEN of the TEN short questions
furnished below. Ans~er should be brief and to the point. (7x5 35)
(a) What information are required to be obtained from a subsurface investigation?
What are the uses of these information?
(b) De~cribe briefly the main considerations in carrying out a subsurface investigation
programme.
(c) List the common types of boring that are usually used in direct method of subsoil
exploration. State the salient features ofthese methods each in three sentences. . l.I'Y) lQ.,( .
(d) Classify soil samples and define each of them. How would classify So€mPI~ Y .~(e) How do the soil samples get disturbed? How the "during sampling" disturbance of
soil is estimated?
(f) What are the functions of pile foundation? Give a classification chart for pile
based on various criteria.
(g) Describe briefly the construction methodology for a bored pile having a diameter
of 1000 mm and length of 25 m, to be constructed in Dhaka city. Write a short
specification for the concrete to be used in this construction.
(h) Briefly describe thg&thOd of estimating skin friction ofapile.
(i) What is negative skin friction? What are the remedial measures for reducing
negative skin friction in pile foundation?
(j) Show in a neat sketch the various elements of pile head assembly for safe driving
ofa pile.
2. A 3 x 4 pile. group consists of 12 piles of 300 mm diameter and 15 m length, spaced at
900 mm centre to centre. The top 6.0 m consists of soft clay with Cu = 30 kPa, followed
by 6.0 m of medium shift clay with Cu = 65 kPa, which is underlain by stiff clay with.
Cu = 90 kPa. Estimate the allowable load carrying capacity of the pile group. Assume a
global factor of safety of 2.50, and reasonable values of any other data if required.
Contd P12
(14)
=2=CE 441
3. A pile group consists of 20 piles 400 mm square at a spacing of 1200 mm centre to
centre. Draw a plan showing the arrangements of the piles. Computer the minimum and
maximum pile reactions for the following data:
Total vertical load = 2000 kN
Load Eccentricity in Long Direction, ey = 600 mm
Load Eccentricity in Short Direction, ex = 400 mm
(14)
4. A 350 mm x 350 mm square pile is driven into a sand profile to a depth of 15 m. The
underlying soil is clay. The SPT results are shown in the following Table. Estimate the
allowable load carrying capacity of the pile. (14)Depth (m) 1.5 3.0 4.5 6.0 7.5 9.0 10.5 12.0 13.5 15.0 16.5
N-Value 22 18 25 20 22 23 25 27 28 30 15..,
5. The blow counts for an SPT test at a depth of 6 m in fine sand at every 150 mm are 8, 12
and 15. A donut hammer and a standard split spoon sampler were used in a borehole of
150 mm diameter. Estimate the corrected N-value. The water table is at a depth of 2.0 m
from ground surface. The unit weight of above water table soil is 16.5 kN/m3, whereas,
below water table the saturated unit weight is 18 kN/m3• Given that rod length correction
..1 10"I - b q pet unit area1.6 .- '1.4 I:.z , . . fO-~! -' ~°z II ",,- 12 :,:['pV I ,:
""'1- ,I, ' .:',: ;
Z '/ ~ n ».'.
,.:
"// I "
•••••••• O• .. ' .....' '// 0.7 , '.,>'//
WI,f/ -- D.,"~ /
. ~ 0..V >..m~ nare
interehang~Je"BK~ I,-J ' J ,/ I;
..fj "
0.3 "1:
") ~ t .:.:' ...•.:
l II , ". ~,
If. r) I II 0.2.... ~ rJ '} ~ I.io'"
') j',' I •• ; ..." ..
V/ ~I m=O.lI; .~ ~~ """,. ' .•... w ' ....• ~~ .
O.s' :iiiifi'V~.
~ io"'"- ......... .. m=O.O
0.250.24
0.22
0.20
0.18
0.16
46 8 0.1 2 4 6 81.0 2 .: Values ofn = J/z .
. ..'. Graph for determining influence value for vertical normal stress CTzat' ,
point P located beneath one camerof auniformely loaded rectangular area. ..(After Fadum)
0.000.01
;
I1
0.14i lo'o
'S
~ 0.12i >
! 0.10
f 0.08Ij
II ' 0.06I!
0.04
0.02
, (28)
IAfT-I/CE ~i'~ Date: 10/01/2015
BANGLADESH UNIVERSITY OF ENGINEERING AND TECHNOLOGY, DHAKAL-4/T-1 B. Sc. Engineering Examinations 2012-2013
Sub: CE 451 (Transportation Engineering II: Pavement Design and Railway Engineering)
Full Marks: 280 Time: 3 HoursThe figures in the margin indicate full marks.
USE SEPARATE SCRIPTS FOR EACH SECTION
SECTION-AThere are FOUR questions in this section. Answer any THREE.
Assume reasonable values for missing data, if any.
1. (a) What are classification of aggregates based on source, size and weight? Why is
aggregate grading and blending important for any aggregate construction in roads? (15)I
(b) What are the main differences between Marshall and Hveem'method of mix design
regarding compaction and testing of specimens? (15)(c) How do you finq C.K.E. and surface capacity values in Hveem method of mix design?An asphaltic' concrete sample cut from a completed pavement weighs 3540 grn in air and1962 grn in water. The laboratory compacted specimen of the same mix has a bulk
specific gravity Gmbof 2.384 and voids of 5.5 percent. Is the mix satisfactory? (16 X)
2. (a) Briefly state the steps for refining crude petroleum in order to get different variet~es ofasphaltic materials. What are the grades of asphalt cement based on st;mdard capillary
viscometer test results? (1873') ,
(b) Name the laboratory tests of bituminous materials used in road construction. Write
down the specification requirement for asphalt used runway overlay mixes. (16)(c) What are the especial qualities required for bitumen to be used in road construction of
Bangladesh? How are these qualities be achieved? (12)
3. (a) Define Perpetual Pavement? What are the technological advancements made
Perpetual Pavement possible? Write down three main considerations of Perpetual
Pavement. Compare between flexible pavement and rigid pavement. (3+4+ 3+ 12=22)(b) State the common modes of distresses of flexible pavement. What are the problemsassociated with pavement Fatigue Cracking and main causes of this distress? State theways of removing 'Bleeding of bituminous pavement'? What were the purposes and
outcomes of AASHO road test? (7+673' +3+8=2473')
4. (a) List different methods of pavement design. Write down the types of rigid pavement/
joints and functions of dowel hars. Draw a typical joint detail of rigid pavement showing
sealant reservoir and backer rod. (6+8+473' = 1873' )
(b) Design a concrete pavement by using PCA method for the conditions given below.Give one trial and put your comments on the trial thickness. Solution could be giv~n in
the worksheet. provided at the en~uestion paper.,IJ~ Contd P12
CE 451
General Data
Traffic (Average Daily Traffic, ADT):Trucks:Annual growth:Modulus of Rupture, MR:
Modulus of Subgrade Reaction, k:Design life:
Other DataDoweled joints: YesShoulder: NoSubbase: 6 in untreated
Truck Axle Load Distributions
=2=
450 veh/day (both directions)IS percent of ADT3 percent
5S0 psi100 pci20 years
Axle Load Group No. axles per 100 trucks on the road(kips) Single Axles Tandem Axles12-14 8.014-16 7.316-18 6.118-20 5.420-22 3.222-24 7.624-26 8.426-28 9.0
r28.30 11.230:32 9.432-34 1.8,34-36 1.4,36-38 .
0.938-40 1.0
Effect of Untreated Subbase on k Values,
Subgrade value, Subbase k value, pcipci 4 in. 6 in. 9 in. 12in.50 65 75 85 110100 130 140 160 190200 220 230 270 320300 320 330 370 430
Contd P/3
=3=CE 451
SECTION-BThere are FOUR questions in this section. Answer any THREE.
5. (a) Explain nature and values of various train resistance for a moving locomotive.
(b) Explain factors affecting the choice of a railway gauge and mention examples of
countries for different gauges.
(c) Write short notes on the following:
(i) Deficiency in super-elevation
(ii) Working principals of compressed air and vacuum brakes
(iii) Types of wear on rails
(iv) Coning of wheels
(v) Minimum depth of ballast cushion.
6. (a) Explain with neat sketches the construction and function of a semaphore signal.
(b) Explain with neat sketches the classification o'f railway signals ,according to location.
(c) What is a "turnout"? Draw a complete labelled diagram for a left hand turnout.
(10~)
(16)
(20)
(6,%)
(20)
(20)
7. (a) Write down main strategies for customizing low cost road options. What do you mean
by Engineered Earth road? Discuss construction of Dressed Stone road surface and
Penetration Macadam road surface. Draw a neat section of Bangladeshi rural road with
. Herring Bone Bond (HBB) brick pavement and its construction and .material
specifications. (6+4+ 10+ 10=30)(b) Discuss following construction requirements of plant mixed hot bituminous
pavement.
(i) Quality control plan including testing frequency
(ii) Preparation of asphalt concrete
(iii) Preparation of application surface
(iv) Compaction of asphaltic mix on road
(16X)
8. (a) Write down names and uses of 10 highway construction equipments. Explain how
Gantt Charts Critical Path Method (CPM) and Program Evaluation and Review
Technique (PERT) are useful tool in highway construction management. (10+ 10=20)(b) Write down names of cement concrete uniformity testing prior to start of rigid
pavement constl)1ction. Explain various curing means for rigid pavement. Discuss
pumping distress phenomenon in rigid pavement.
(c) Explairi highway network management system framework with a schematic flow chart.
(16~)
(10)
.':.,
_.L.l_-,-
Slab k of subl!rade-subbase. oeithickness, in. 50 100 150 200 300 500 700
