(DCE 411) B.Tech. DEGREE EXAMINATION, JUNE 2010. Final Year Civil Engineering Paper I — ADVANCED STRUCTURAL ANALYSIS — II Time : Three hours Maximum : 75 marks Answer question No. 1 is Compulsorily. (15) Answer ONE question form each Unit. (4 × 15 = 60) 1. (a) What are the forces developed in a curved beam? (b) How overturning of the curved beam is avoided? (c) State Muller-Breslaw principle. (d) What are the uses of influence line diagram? (e) A uniformly distributed load of 12 kN/m, 6 m moves on a simply supported girder of span 10 m. Find the greatest reactive at a support. (f) State any one theorem of plastic collapse. (g) State upper bound and lower bound theorems. (h) Define the following terms : (i) shape factor (ii) plastic beige. (i) Write any two assumption made is plastic theory. (j) How many mechanisms are formed is case of frames? (k) Differentiate flexibility method from stiffness method. (l) Write any four design steps to be followed in stiffness matrix method. (m) State generalised co-ordinate system and give one example. (n) State degree of static and Kinematic Indeterminacy. (o) Define plastic moment capacity.
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(DCE 411) - Anucde2 (DCE 411) UNIT I 2. A semi circular beam simply supported on the supports equally spaced as shown in fig. 1. Find the (a) Total load on the semicircular beam (b)
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(DCE 411)
B.Tech. DEGREE EXAMINATION, JUNE 2010.
Final Year
Civil Engineering
Paper I — ADVANCED STRUCTURAL ANALYSIS — II
Time : Three hours Maximum : 75 marks
Answer question No. 1 is Compulsorily.
(15)
Answer ONE question form each Unit.
(4 × 15 = 60)
1. (a) What are the forces developed in a curved beam?
(b) How overturning of the curved beam is avoided?
(c) State Muller-Breslaw principle.
(d) What are the uses of influence line diagram?
(e) A uniformly distributed load of 12 kN/m, 6 m moves on a simply supported girder of span
10 m. Find the greatest reactive at a support.
(f) State any one theorem of plastic collapse.
(g) State upper bound and lower bound theorems.
(h) Define the following terms :
(i) shape factor
(ii) plastic beige.
(i) Write any two assumption made is plastic theory.
(j) How many mechanisms are formed is case of frames?
(k) Differentiate flexibility method from stiffness method.
(l) Write any four design steps to be followed in stiffness matrix method.
(m) State generalised co-ordinate system and give one example.
(n) State degree of static and Kinematic Indeterminacy.
(o) Define plastic moment capacity.
(DCE 411) 2
UNIT I
2. A semi circular beam simply supported on the supports equally spaced as shown in fig. 1.
Find the
(a) Total load on the semicircular beam
(b) Bending moment at a point p
(c) Maximum value of twisting moment.
Fig. 1
Or
3. Using Muller-Breslau principle, compute the influence line ordinates at 2 m intervals for
moment at mid-span of BC of the continuous beam ABC shown in fig. (2)
Fig. 2
UNIT II
4. Determine the collapse load for the beam shown in fig. (3).
Fig. (3)
Or
(DCE 411) 3
5. A Potal frame shown in fig. (4) has uniform section throughout. Determine the value of the
plastic moment of resistance ( )pM in terms of the load Wu @ collapse.
Fig. (4)
UNIT III
6. Analyse the continuous beam shown is fig. (5) by the flexibility matrix method.
Fig. (5)
Or
7. Analyse the frame shown in fig. (6) below, by flexibility method and draw bending moment
diagram.
Fig. (6)
(DCE 411) 4
UNIT IV
8. Analyse the continuous beam shown in fig. (7) by stiffness method and draw bending
moment diagram.
Fig. (7)
Or
9. Using stiffness method, find the displacement at A and B of the portal frame shown in fig. (8)
(use the advantage of symmetry) EI is constant.
Fig. (8)
———————
(DCE 412)
B.Tech. DEGREE EXAMINATION, JUNE 2010.
Final Year
Civil Engineering
Paper II — EARTHQUAKE ENGINEERING
Time : Three hours Maximum : 75 marks
Answer question No. 1 compulsorily. (1 × 15 = 15)
Answer ONE question from each Unit. (4 × 15 = 60)
1. (a) Define transient vibrations.
(b) Mention the types of vibrations.
(c) Define degrees of freedom.
(d) How ground motion excitation is done?
(e) What is dry fiction damping?
(f) Why vibration Isolation is required?
(g) How Coulomb damping is done?
(h) How damping is measured?
(i) What are the factors influencing the ground motion?
(DCE 412) 2
(j) Mention any four effects of liquefaction.
(k) What is the main importance of ductility in earthquake resistant design?
(l) Define Ductility ratio.
(m) What is the need for Base Isolation?
(n) What is the main methodology for seismic Retrofitting of R.C. Buildings?
(o) What are the methodologies available for the evaluation of existing buildings (Seismic Evaluation)?
UNIT I
2. (a) Explain briefly the types of prescribed Deterministic loading with the help of neat sketches. (10)
(b) Write a short notes about consequences of vibration. (5)
Or
3. The damped frequency of a system is obtained as 9.8 Hz from a free vibration test during the forced vibration test with constant exciting force on the same system, the maximum amplitude of vibration is found to be at 9.6 Hz. Find the damping factor for the system and its natural frequency.
(DCE 412) 3
UNIT III
4. (a) Explain briefly the factors influencing the
ground motion. (5)
(b) How we can identify the earthquake sources?
(5)
(c) Explain in detail the types of Seismic Base
Isolation system. (5)
Or
5. (a) What is seismic dampers? Explain in detail
the types of Dampers with the help of neat
sketches. (10)
(b) Write a short notes on measurement of
strong motion. (5)
UNIT III
6. Explain step-by-step procedure for lateral load
analysis of masonry buildings with the help of
neat sketches. (15)
Or
7. (a) Explain in brief about identification of
seismic damage in building components. (10)
(b) What are the main sources of weakness in
RC frame buildings? (5)
(DCE 412) 4
UNIT IV
8. (a) Write briefly the step-by-step procedure of
earthquake resistance design in case of steel
structures. (10)
(b) How repair and Retrofitting is done for
damaged steel structures? (5)
Or
9. (a) Explain in brief the types of liquefaction. (5)
(b) Describe the methods to reduce liquefaction
with the help of neat sketches. (10)
——————
(DCE 413)
B.Tech. DEGREE EXAMINATION, JUNE 2010.
Final Year
Civil Engineering
Paper III — WATER RESOURCES ENGINEERING — III
DESIGN AND DRAWING
Time : Three hours Maximum : 75 marks
UNIT I
1. Design a notch type canal drop with the following details.
Particulars U/S D/S
Full supply discharge 8 m3/s 8 m3/s
Bed level of canal 50 m 48 m
Full supply level 51.5 49.5
Bed width 8 m 8 m
Top width of banks 2 m 2 m
Top level of banks 52.5 52.5
Side slopes in cutting 1 : 1, filing 121 : 1
Hard soil for foundation = 48.5 m
Draw a rough sketch not to scale showing the obtained details.
Or
2. Design a canal regulator for the following data :
Hydraulic particulars Canal U/S Canal D/S
Full supply discharge 20 m3/s 16 m3/s
Bed width 15 m 15 m
Bed level 10 m 10 m
Full supply level 12 m 11.75 m
Top level of bank 13 m 12.75 m
Ground level at site GL = 9 m
Bottom level of bank = 15 m
Draw not to scale sectional elevation.
(DCE 413) 2
UNIT II
3. Design a direct sluice taking off from a maincanal irrigates 200 hectares of land with a
duty of 800.
Hydraulic particulars of main canal :
Full supply discharge = 500 cumecs
Bed width of canal = 20 m
Bed level of canal = 50 m
Full supply depth of water = 3 m
Half supply depth of water = 2 m
Ground level = 52 m
Top bund level = 54 m
Top width of bund = 5 m
The canal has 1 : 1 and 1 : 2 side slopes in cutting and in embankment respectively.
Hydraulic particulars of the distributary canal.
Bed width of distributary = 1 m
Bed level of distributary = 50.50
Full supply level = 52 m
Top level of bank = 52.75 m
Top width of bank = 1.0 m
Hard soil is available at 51.5 m. Draw section and elevation along the barrel.
Or
4. Design a surplus weir for minor tank forming a group of tanks with the following available
information.
Combined catchment area = 30 sq.km.
Catchment area intercepted by the upper tank = 20 sq.km.
Ryye’s constant or coefficient = 9
The earth bund has the following details
Top width = 2.4 m
Side slopes = 2 : 1 on both sides
(DCE 413) 3
Top level of bund = 100.5 m
Full tank level = 98.0 m
Maximum water level = 98.75 m
General ground level at the site is 97 m
Ground level slopes of to a level 96 m in a distance of 8 m
Provision is to be made to store water upto maximum water level in times of necessity
Draw half longitudinal section and half longitudinal elevation.
——————
(DCE 414)
B.Tech. DEGREE EXAMINATION, JUNE 2010.
Final Year
Civil Engineering
Paper IV — ENVIRONMENTAL ENGINEERING — II
Time : Three hours Maximum : 75 marks
Answer question No.1 is compulsory. (15 marks)
Answer ONE question from each Unit. (4 × 15 = 60)
1. (a) What are the main sanitary works?
(b) Why it is necessary to collect, treat and dispose of the waste products of town?
(c) What are the various sewerage systems?
(d) Differentiate between sewage and drainage.
(e) What are the various types of storm water regulator used in a sewerage system?
(f) Write any two factors affect the quantity of sanitary sewage.
(g) How quantity of storm sewage is determined by Rational methods?
(h) What do you understand by velocity of flow?
(i) What materials can be used for constructing swages?
(j) What do you understand by the drop man hole?
(k) List out the various methods of sewage disposal.
(l) What do you understand by sewage sickness?
(m) Write any two main objects of treating sewage.
(n) What do you understand by ‘Sanitary land filling’ and how is it practised?
(o) What is meant by the term refuse?
(DCE 414) 2
UNIT I
2. (a) What are the aims and objects of sewage disposal? (5)
(b) Draw a general layout of a sewerage system and indicate on it a lateral, branch, main
and outfall senses. (5)
(c) Describe the method of estimating sanitary sewage of acity in detail. (5)
Or
3. (a) What do you understand by time of concentration? What is its importance in
determination of storm flow? How it is calculated? (7 21 )
(b) Write a short note on the laying of senses and their Jointing with the aid of neat
sketches. (7 21 )
UNIT II
4. (a) Why the examination of sewage is necessary? How the sewage sampling is done? How
bacteriological examination of sewage is done? (7 21 )
(b) Design a circular sewage sedimentation tank for a town having population of 45,000.
The average water demand is 150 liters / capita/ day. Assume that 70% water reaches
at the treatment with and the maximum demand is 2.7 times the average demand.
(7 21 )
Or
5. (a) What are the properties and quantity of sludges obtained from various sewage
treatment units? (7 21 )
(b) Sketch and describe the construction and working of an Imboff tank. (7 21 )
(DCE 414) 3
UNIT III
6. Determine the size of a high rate trickling filter for the following data :
(a) Sewage flow = 4.5 mld
(b) Recirculation ratio = 1.5
(c) BOD of raw sewage = 250 mg/l
(d) BOD removal in primary tank = 30%
(e) Final effluent BOD desired = 30 mg/l.
Or
7. (a) Write a detailed note on land treatment of sewage dealing with the chemical as well as
the engineering aspect of the process. (7 21 )
(b) What do you understand by self-purification property of a steam? Explain the factors
affecting the property. (7 21 )
UNIT IV
8. (a) What is sewage sludge? Explain all its characteristics and composition? Explain with
sketch the disposal of sludge by ‘Lagooning’ (or) by ‘Application on land’. (7 21 )
(b) Design a sludge digestion tank with the following data :
(i) Average flow of sewage = 70 × 106 litres/day
(ii) Total suspended solids is the raw sewage = 350 mg/litre.
(iii) Volatile suspended solids = 250 mg/litre.
(DCE 414) 4
(iv) Moisture content of the digested sludge = 87%.
Assume suitable data if necessary. (7 21 )
Or
9. (a) What are the different methods of disposal of solid refuse? Which one is most popular in
India? Explain the process in detail. (5)
(b) Explain briefly sludge intilization and sludge disposal. (5)
(c) Draw a sketch of a sludge digested and explain its working. (5)
———————
(DCE 415)
B.Tech. DEGREE EXAMINATION, JUNE 2010.
Final Year
Civil Engineering
Paper V — ESTIMATION AND VALUATION
Time : Three hours Maximum : 75 marks
Answer Question No.1 compulsorily. (1 × 15 = 15)
Answer ONE question from each Unit. (4 × 15 = 60)
1. (a) What is meant by Degree of accuracy?
(b) Give the different types of specifications.
(c) What is meant by scrap value?
(d) Write any two factors which affect the value of a property.
(e) Write one difference between earnest money deposit and security money deposit.
(f) What is measurement book?
(g) What are the different methods used in the estimation of the quantities of the
earthwork?
(h) Write any two merits of contracts, of any one type.
(i) What is sinking fund?
(j) What are outgoings in valuation?
(k) What is the difference between Gross income and Net income?
(l) Write a note on obsolescence.
(m) Write a note on Mortgage.
(n) What do you mean by Task or out-turn work?
(o) What is capitalized value?
(DCE 415) 2
UNIT I
2. Explain in detail about the estimation of various main items of work.
Or
3. (a) Briefly explain about the centre line method of building estimates.
(b) The arch of a culvert, subtend an angle of 120° span the at the centre of the arch is 5.00
m and the thickness of the arch is 50cm. The length of the arch. is 8.00m from face to
face. Calculate the quantities of arch masonry work, and cement plastering in the soffit
of arch.
UNIT II
4. At hill side a road is to be constructed on the original ground having a cross fall of 1 in 6. The
formation width of the road is 10m and the side slopes are in cutting 1 in 1 and in filling 1 in
1 21 . The depths of cutting at the centre line of the road for two adjacent sections at a
distance 30 m apart are 0.4m and 0.7m. Estimate the quantities of earth work in banking
and cutting for the above portion of road.
Or
5. The ground levels at various chainages along the centre line of a proposed road are under.
Chainage : 21 22 23 24 25
RL of Ground (m) 180.50 183.36 185.52 187.10 186.50
The ground has a uniform cross slope of 1 in 10. The chainage is 30m long. The road
formation is proposed at a uniform gradient passing through GL, at end chainages.
Formation width of road is 8m side slope of cutting as 1:1. Estimate the quantity of
earthwork for the proposed road section in a tabular form.
UNIT III
6. Write down detailed specifications for the following items of work :
(a) Wood work for door and windows.
(b) Size stone masonry in CM (1 : 6)
(c) RCC linters and columns (1 : 2 : 4).
Or
(DCE 415) 3
7. Workout the unit rates for the following items of work :
(a) Cement concrete (1 : 4 : 8) in foundation.
(b) Plastering in CM (1 : 4), 12 mm thick.
(c) First class brick work in CM (1 : 6).
UNIT IV
8. (a) Draft a tender notice for the construction of an office building with plinth area of
15,000 sq.m. (10)
(b) Explain about the contracting systems. (5)
Or
9. (a) What do you mean by valuation? Write a detailed explanatory note on factors affecting
valuation. (7 21 )
(b) What is meant by Depreciation? Explain various methods for estimating cost
depreciation. (7 21 )
———————
(DCE 416 (A))
B.Tech. DEGREE EXAMINATION, JUNE 2010.
Final Year
Civil Engineering
PRE STRESSED CONCRETE
Time : Three hours Maximum : 75 marks
Answer Question No.1 compulsorily. (15 marks)
Answer ONE question from each Unit. (4 × 15 = 60)
1. (a) How the shrinkage of concrete in prestressed members occurs?
(b) What is the main use of light - weight aggregate prestressed concrete?
(c) List out the various types of devices used to tensioning steel is prestressing systems.
(d) What are the basic assumptions made while analysis of prestress and bending?
(e) Define pressure line as Thrust line.
(f) How the stresses in tendons resist the prestressing force?
(g) What is meant by cracking moment?
(h) List out the losses in predestining systems.
(i) Why suitable control on deflections is very essential?
(j) List out various types of flexual failures encountered in prestressed concert members.
(k) Mention the different types of shear walks.
(l) When we can say the member is subjected to prove torsion in case of prestressed
concrete members?
(m) Define transmission length in pretensioned members.
(n) Define Bond stresses in case of pretensioned members.
(o) How the stress-distribution nature will be in case of end block of a post-tensioned
pressed concrete element?
(DCE 416 (A)) 2
UNIT I
2. (a) Write the advantages of pre stress concrete. (5)
(b) List out the different methods of protersioning methods and explain in detail any two
methods with the help of neat sketches. (10)
Or
3. A post-tensioned concrete beam, 150 mm wide and 350 mm deep, is pre-stressed by three
cable, each with a cross-sectional area of 50mm2 and with an initial stress of 1200N/mm2. All
the three cables are straight and located 100 mm from the soffit of the beam. If the modular
ratio is 6, calculate the loss of stress in the three cables due to elastic deformation of concrete
for all the following cases.
(a) Simultaneous tensioning and anchoring of all the three cables and
(b) Successive tensioning of the three cables, one at a time.
UNIT II
4. A rectangular concrete beam 250 mm wide by 300 mm deep is pre-stressed by a force of
540KN at a constant eccentricity of 60 mm. The beam supports a concentrated load to 70KN
at the centre of a span of 3m. Determine the location of a pressure line at the centre, quarter
span and support sections of the beam. Neglect the self-weight of the beam.
Or
5. (a) List out the salient factors which influencing Deflections in case of presstressed
concrete members. (5)
(b) A concrete beam with a cross-sectional area of 32 × 103 mm2 and radius of gyration of
72mm is prestressed by a parabolic cable carrying an effective stress of 1500 N/mm2.
The span of the beam is 8m. The cable, composed of 6 wires of 8mm diameter, has an
eccentricity of 50mm at the centre and zero at the supports. Neglecting all losses, find
the central deflection of the beam as follows.
(i) Self – Weight + Prestress, and
(ii) Self – Weight + Prestress + live load of 2 KN/m. (10)
(DCE 416 (A)) 3
UNIT III
6. (a) Explain briefly the general concepts of elastic design in case of prestressed – concrete
sections for flexure. (7 21 )
(b) What are the preliminary design considerations to be considered incase of elastic design
of prestressed – concrete sections for flexure. (7 21 )
Or
7. Make a preliminary design for section of a prestressed – concrete beam to resist a total
moment of 450 KN-m. The overall depth of ‘T’ section is 920mm and flange width 600 mm,
thickness of flange and web is 100 mm. The effective prestress for steel is 900 MPa, and
allowable stress for concrete under working load is 15 MPa.
UNIT IV
8. A pre tensioned beam of rectangular section, 200 mm wide by 450 mm deep, is prestressed by
12 wires of 5 mm diameter located at an effective eccentricity of 150 mm. The maximum
shear force at a particular section is 120 KN. If the modular ration is 6, calculate the flexual
bond stress developed assuming.
(a) The section as un cracked
(b) The section as cracked.
Or
9. (a) Explain stress distribution in End block with the help of neat sketches. (5)
(b) The end block of a prestressed concrete beam, 150 mm wide and 250 mm deep, supports
an eccentric prestressing force of 150 KN, the line of action of which coincides with the
button Kern of the section. The depth of the anchor plate is 50 mm. Estimate the
magnitude and position of the principal tensile stress on a horizontal plane passing
through the centre of the anchorage plate. (10)
———————
(DCE 416 B)
B.Tech. DEGREE EXAMINATION, JUNE 2010.
Final Year
Civil Engineering
Paper VI — STRUCTURAL DYNAMICS
Time : Three hours Maximum : 75 marks
Answer question No. 1 is Compulsorily.
(1 × 15 = 15)
Answer ONE question form each Unit.
(4 × 15 = 60)
1. (a) What are degrees of freedom (or) generalised co-ordinates?
(b) Distinguish between static and dynamic degrees of freedom.
(c) What are two types of dynamic forces due to Newton’s second law?
(d) In structures how will you classify vibration?