SPPU Civil Engineering (Semester 6)
Structural Design II
December 2016
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


Solve any one question from Q.1(a,b) & Q.2
1(a) Draw strain and stress distribution diagrams with all parameters for the design RCC section of flexure member using LSM.
3 M
1(b) Explain need of Under reinforced section L.S.M Design.
3 M

2 Explain the terms bond stress and developement length. Calculate developement length for 16mm diameter bar in compression and tension by both methods ( WSM and LSM). Use M20 concrete and Fe 500 steel.
6 M

Solve any one question from Q.3 & Q.4
3 Calculate the moment of resistance by LSM for flanged beam section detailed as below:
a) Width of rib= 230m
b) Effective flange width = 1400 mm
c) Thickness of flange = 125 mm d) Effective depth = 565 mm
e) Tension steel = 2- #20 through plus 2 - #16 curtail at midspan.
e) Use M20 grade of concrete and Fe 415 grade of steel.
8 M

4 A reactangular beam section, 230mm wide and effective depth 415 mm is reinforced with 3 bars of 20 mm diameter in the tensile zone and 2 bars of 16 mm in the compression zone. Determine moment of ressistance of the section using WSM. Use M20 grade of concrete and Fe 415 grade steel.
8 M

Solve any one question from Q.5 & Q.6
5 Design a cantilever slab for effective span of 1.3m subjected to floor finish of 2kN/m2 and live load 3 KN/m2. Use Concrete of grade M20 and Fe 500 reinforcement. Draw details of reinforment. Check for shear is not required. (USE LSM).
8 M

6 Design a simply supported slab for a room with clear inner size 3m× 7m. The slab is supported by beams of width 230 mm along all the edges. The slab subjected to floor finish of 1KN/m2 and live load 4KN/m2. Use Concrete of grade M20 and Fe 500 reinforcement. Draw details of reinforcement. Check for shear is not required. (Use LSM).
8 M

Solve any one question from Q.7 & Q.8
7 Continuous RC and ABCD of reactangular section is simply supported as A and D and continous over support B and C. Spam AB = 4.5m, BC= 6.5m and CD =5.5m. The beam carries dead load of 20kN/m ( including its self weight) and live load of 16kN/m. The beam supports 120 mm slab on both sides. Calculate design moment for span BC after 20% redistribution of moments by considering proper load case. Design span BC for flexure and shear. Draw the reinforcement details. Material-Concrete of grade M25, Fe 500 reinforcement.
16 M

8 Design a continuous beam ABCD for flexure only using IS Code coefficients. AB = BC = CD =4.2 m. The beam supports 120 mm slab on both sides. The beam carries dead load of 18 Kn/m(including its self-weight) and live load of 10KN/m. Take material M20 and F2 500. Show the reinforcement detail in longitudinal section and cross-section at continuous support and at mid span.
16 M

Solve any one question from Q.9 & Q.10
9 A reactangular RC beam of span 6m, size 300mm×600mm with effective cover 40 mm is subjected to following actions:
a) Factored BM = 90kN.m
b) Factored SF = 60kN
c) Factored Torsional Moment = 35kN.m Design the beam for flexure and shear using M 25 & Fe 500 grade materials.
16 M

10 Design an anixally loaded short column to carry a working load of 950 kN. The unsupported length of column is 3.5 m. The column is held in position and not restrained against the rotation at both ends. Also deisgn the footing for this column only for flexure and one way shear. Take SBC= 200 kN/mm2. Material M25 and Fe 500 used. Show detailed load and design calculations and reinforcement details in plan and sectional elevation.
16 M

Solve any one question from Q.11 & Q.12
11 Design a bi-axial reactangular short column by limit state method with material M25 and Fe 415 to carry a working load 900 kN. Working moment of 90 kN-m about major axis bisecting the depth of column and 35 kN-m about minor axis bisecting the width of column. The unsupported length of column about major and minor axis is 3.6 m 3.2m. The column is fixed at one end and hinged at the other. Show detailed design calculations and reinforcement details.
16 M

12 Design an uniaxial square short column by limit state method with material M25 and Fe 500 to carry ultimate load 900 kN and working moment of 75 kN-m about major axis bisecting the depth of column. The unsupported length of column is 3.6m. The column is fixed at one end and hinged at the other. Also design the footing for this column only for flexure and punching shear. Take SBC = 225 kN/m2. Show detailed design calculations and reinforcement details in plan and sectional elevation.
!mage
16 M



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