Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Summer 6th Sem 2160607 Elementary Structural Design Previous Question Paper

Enrolment No.___________

**GUJARAT TECHNOLOGICAL UNIVERSITY**

**BE - SEMESTER? VI EXAMINATION ? SUMMER 2020**

**Subject Code: 2160607**

**Date:02/11/2020**

**Subject Name: ELEMENTARY STRUCTURAL DESIGN**

**Time: 10:30 AM TO 01:30 PM**

**Total Marks: 70**

**Instructions:**

**1. Attempt all questions.**

**2. Make suitable assumptions wherever necessary.**

**3. Figures to the right indicate full marks.**

4. Use of IS:456, IS:800 and steel table is permitted.

5. Assume M20 grade concrete and Fe415 steel for RCC element and fy of 250 MPa and

4. Use of IS:456, IS:800 and steel table is permitted.

5. Assume M20 grade concrete and Fe415 steel for RCC element and fy of 250 MPa and

**fu of 410 MPa for the structural steel if not given.**

**Q.1 (a)**Sketch reinforcement detail for a simply supported two-way square slab showing all

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required details including torsion reinforcement.

**(b)**Sketch the typical lap joint and bolted connection using lug angle.

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**(c)**A simply supported rectangular beam of size 250 mm wide and 450 mm effective

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depth is subjected to a factored load of 150 kN/m. Span of beam is 4 m. Find the

reinforcement for flexure. Effective cover for compression reinforcement is 50 mm.

**Q.2 (a)**Define (i) Limit State (ii) Characteristic strength (iii) Partial Safety Factor

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**(b)**A singly reinforced rectangular beam of width 230 mm and 450 mm effective depth

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is reinforced with 3 no. 20 mm diameter bars. Find out the factored moment of

resistance of the section. Take grade of concrete M20 and grade of steel Fe 415.

**(c)**A tee-beam with 1500mm wide flange and 100 mm deep slab. The overall depth of

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beam is 650 mm and width of web is 300 mm. A beam is reinforced with 6 nos. of

28 mm dia. bar and 2 nos. of 22 mm dia. bar. Find the factored moment of T-Beam.

Take grade of concrete M20 and grade of steel Fe 415. Assume effective cover is

50 mm.

**OR**

**(c)**Design a square footing for isolated column 500 mm x 500 mm size carrying an

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axial load of 1600 kn. Safe bearing capacity of soil is 200 kN/m2. Use M-20 grade

of concrete and Fe ? 415 grade of steel. Draw neat sketch.

**Q.3 (a)**Write advantages and disadvantages of Steel and R.C.C. Structures.

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**(b)**Calculate mid span moments of simply supported two way slab with effective span

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3.11 m and 4.11 m in x and y direction respectively. Slab is subjected to total

factored load (Including self weight) of 10.76 kN/ m2. Take grade of concrete M20

and grade of steel Fe 415.

**(c)**Design a simply supported one-way slab for clear room dimension 3 m x 10 m. Slab

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is supported on masonry walls of 300 mm thickness. Live load acting on slab is

3.0 kN/m2 and floor finish is equal to 0.75 kN/m2. Use M-20 grade of concrete and

Fe ? 415 grade of steel.

**OR**

**Q.3 (a)**Draw and details of edge strip and middle strip of two way slab aper IS 456: 2000.

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**(b)**Calculate size and longitudinal reinforcement of RCC square column section to carry

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ultimate axial load 2000 kN. Assume 2% of cross section as longitudinal reinforcement.

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**(c)**Design and detail shear reinforcement for RC beam subjected to ultimate shear force

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of 120 kN. Cross section of beam is 250 x 400 mm effective and reinforced with

4 nos. of 16 mm diameter bars. Use M-20 grade of concrete and Fe ? 415 grade of

steel.

**Q.4 (a)**Sketch the details of slab base footing.

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**(b)**Design suitable fillet weld to connect a tie plate 60 x 8 mm to a 12 mm thick gusset

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plate. The plate is suitable to load equal to full strength of the member. Assume

shop welding and Fe 410.

**(c)**Design a double angle discontinuous strut to carry a factored load of 200 kN. The

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length of strut is 3.0 m between intersections. The two angles are connected back

to back on same side of gusset plate and tack bolted. Assume grade Fe 410 steel

with fy = 250 MPa.

**OR**

**Q.4 (a)**Write down advantages and disadvantages of welding.

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**(b)**Find shear capacity of a bolt for 20 mm diameter 4.6 grade bolt, connecting 410 grade

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10 mm thick plate, in single shear and double shear. Consider area of bolt is 245 mm2.

**(c)**Design a steel column to carry factored load of 1200 kN. The length of column is

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6 m with both end effectively held in passion and restrain against rotation. Select

two channels butting and welded toe to toe. Assume fy = 250 MPa.

**Q.5 (a)**Explain single lacing system and double lacing system with neat sketches.

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**(b)**Two plates of 12 mm and 20 mm thickness have width of 100 mm. These plates are

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connected by lap joint to resist design tensile load of 70 kN. Find bolt value if 16 mm

bolts of grade 4.6 is used for connection.

**(c)**Design a tie member of roof truss subjected to working dead load and live load 90 kN

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and 110 kN respectively. Use double angle section connected back to back on either

side of 8 mm thick gusset plate. Use bolted connection. fy = 250 MPa and fu = 410 MPa.

**OR**

**Q.5 (a)**Explain slenderness ratio, lug angle and shear leg effect.

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**(b)**Explain term (i) Lateral ? torsional buckling (ii) Web crippling

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**(c)**Design the slab base foundation for an ISHB 350 column to carry a factored load of

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1200 kN. Take Fe 410 grade steel and M25 grade concrete. Assume SBC of soil is 200

kN/m2.

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This post was last modified on 04 March 2021