Gujarat Technological UniversitySummer 2025 examination

GTU 3150612 Design of Structures Summer 2025 Question Paper & PDF

B.E. · Civil Engineering · Semester 5 · Subject code 3150612
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Total
70 marks
To pass
23 marks (33%)
Duration
2.5 Hours 2:30 PM – 5:00 PM
Questions
5 with internal choice
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13 of 25 questions on this paper were also asked in other years. 2 more are types of question GTU sets again with new data. Each is marked below with the years it appeared.See all 27 repeated 3150612 questions, most asked first

Q.1

14 Marks
(a)
3 marks

Compare the limit state method for deign of reinforced concrete and steel structures with respect to serviceability criteria.

(b)
4 marks
Define
1)Design Shear
2)Characteristic strength
3)Two-way Shear
4)Effective cover
(c)
7 marks

Two plates of thickness 10 mm and 12 mm are connected using HSFG 8.8 grade bolts of 22 mm diameter. Calculate the proof load. Calculate the design shear force for the bolt if slip resistance is designed at ultimate load and assume fasteners in clearance holes. (Take coefficient of friction = 0.5, number of effective interfaces offering frictional resistance to slip = 1)

Q.2

14 Marks
(a)
3 marksAsked in 4 of 6 papers
What does 6 and 8 imply for bolts of grade 6.8?

Also asked in Summer 2026 Q4a OR, Summer 2024 Q2a, Summer 2023 Q2a

(b)
4 marksAsked in 2 of 6 papers

Explain the different types of failures observed in bolted connection with neat sketches.

Also asked in Summer 2026 Q2a

(c)
7 marksSame type asked in 4 of 6 papers

Calculate the design shear strength of ordinary bolt of nominal diameter 20 mm and grade 4.6 under double shearing condition; one shearing plane intercepts at shank portion and another at threaded portion. The sizes of two connecting plates are 12 mm and 14 mm.

Also asked in Summer 2024 Q2c, Winter 2023 Q3b OR, Summer 2023 Q2c

(c)
7 marks

The singly reinforced concrete beam section of width 300 mm and effective depth 450 mm, is made of M25 grade concrete and Fe 500 grade reinforcing steel. The total cross-sectional area of the tension steel is 942 mm². As per Limit State Design of IS 456, Calculate the design moment capacity of the beam section?

Q.3

14 Marks
(a)
3 marksAsked in 4 of 6 papers
Differentiate the lap and butt joint with neat sketches.

Also asked in Winter 2025 Q3a OR, Winter 2023 Q4a OR, Summer 2023 Q3a

(b)
4 marksAsked in 4 of 6 papers
Draw neat sketch of Slab based foundation.

Also asked in Summer 2026 Q5b OR, Summer 2024 Q3b, Winter 2023 Q3a OR

(c)
7 marks

Determine the block shear strength of the tension member shown in Fig. 1. The steel is of grade Fe 410.

GTU Design of Structures (3150612) Summer 2025 Question 3(c) Diagram
(a)
3 marksAsked in 3 of 6 papers
Define
i)Gauge
ii)Pitch
iii)slenderness ratio

Also asked in Winter 2025 Q3a, Summer 2023 Q3a OR

(b)
4 marksAsked in 4 of 6 papers

Explain the stress-strain curve of concrete and steel with stress block parameters with neat sketch adopted by Bureau of Indian Standards for Concrete and Steel Structures.

Also asked in Winter 2025 Q3b OR, Summer 2024 Q3b OR, Summer 2023 Q3b OR

(c)
7 marksAsked in 3 of 6 papers

Design an interior slab panel of effective dimensions 4.2 m × 6.25 m subjected to a factored load of 15 kN/m² inclusive of self-weight and floor finish load. The slab is provided with main reinforcement bar diameter as 10 mm, and has overall thickness of 150mm. Clear cover is 20 mm, grade of concrete is M20, grade of steel Fe415.

Also asked in Summer 2024 Q3c OR, Summer 2023 Q3c OR

Q.4

14 Marks
(a)
3 marksAsked in 2 of 6 papers
State advantages and disadvantages of welded connections.

Also asked in Summer 2023 Q4a

(b)
4 marksSame type asked in 3 of 6 papers

Determine the development for 16 mm diameter bar, Fe 415 grade steel in compression and M 25 grade of concrete.

Also asked in Summer 2024 Q4b, Summer 2023 Q4b

(c)
7 marks

The rectangular beam of width, 300 mm is having overall depth of 600 mm. The concrete grade is M20 and the grade of reinforcing steel is Fe415. The tensile reinforcement is provided by 5-20 mm dia. bars. The clear cover is 25 mm. The design shear force is 500 kN. For M20 grade of concrete, the maximum shear stress permitted is 2.80 MPa. Find the effective depth and check whether it is sufficient or not.

(a)
3 marksAsked in 3 of 6 papers
Why are the end returns provided in fillet welds?

Also asked in Summer 2024 Q4b OR, Summer 2023 Q4b OR

(b)
4 marksAsked in 2 of 6 papers

A perfectly axially loaded concrete column of gross dimension 400 mm × 400 mm is reinforced with 4 bars of 20 mm diameter. Determine the design axial load carrying capacity of the column. Consider M25 grade concrete and Fe 415 grade steel.

Also asked in Winter 2025 Q4c

(c)
7 marksAsked in 2 of 6 papers

The rectangular beam of width, 300 mm is having overall depth of 400 mm. The concrete grade is M20 and the grade of reinforcing steel is Fe 415. The tensile reinforcement is provided by 4-20 mm bars. In the compression side, the reinforcement is provided by 2-16 mm bars. The clear cover is 25 mm. The salient points of design stress-strain curve of Fe 415 is given by (strain, stress, N/mm²) (0.00144, 288), (0.00163, 306), (0.00192, 324), (0.00241, 342), (0.00276, 351), (0.00380, 360). Evaluate the

i)additional moment that the section can take.
ii)The stress in steel at compression level
iii)The moment of resistance of the whole section, and
iv)Check the nature of the section (Under reinforced/Over reinforced)

Also asked in Winter 2025 Q2c OR

Q.5

14 Marks
(a)
3 marksAsked in 5 of 6 papers

Explain the necessity of four different buckling curves prescribed to evaluate column strength?

Also asked in Summer 2026 Q3b OR, Winter 2025 Q4a OR, Summer 2024 Q5a OR, Summer 2023 Q5a OR

(b)
4 marksAsked in 3 of 6 papers

Enlist the various failure modes of axially loaded tensile member along with sketch (line diagram only).

Also asked in Summer 2024 Q5b OR, Summer 2023 Q5b OR

(c)
7 marks

Design a laterally supported beam of effective span 5 m for the following data. Grade of Steel: Fe 410; Factored Maximum Bending Moment 180 kN-m and maximum Shear Force 220 kN. Only provide safety check for buckling.

(a)
3 marks

If a short column having overall dimension of 300 mm X 500 mm and 16 mm diameter of longitudinal bars, Estimate the maximum spacing between two lateral ties.

(b)
4 marks

The main reinforcement of RC slab consists of 10 mm bars at 10 cm spacing. If it is desired to replace 10 mm bars by 12 mm bars, then estimate the revised spacing of 12 mm bars.

(c)
7 marks

For a factored load of 15 KN/m², inclusive of self-weight, on an interior panel of 4.2 m × 6.25 m (effective dimensions). Consider the following statements-

1)The negative moment at the continuous edge for longer span, rounded to two decimal places will be 18.75 KN-m;
2)The positive moment at the mid-span for longer span, rounded to two decimal places will be 14.06 KN-m;
3)The negative moment at the continuous edge for shorter span, rounded to two decimal places will be 13.97 KN-m;
4)The positive moment at the mid-span for shorter span, rounded to two decimal places will be 10.78 KN-m Which of the above statements are incorrect? Justify your answers with proper calculations.

More Design of Structures papers

Questions repeat across sessions. Working through two or three papers shows you which topics GTU asks most.

Summer 202670 marks · 5 questions
Winter 202570 marks · 5 questions
Winter 202470 marks · 5 questions
Summer 202470 marks · 5 questions

Other Semester 5 subjects

BE Civil

2150603
Environmental Engineering
2150608
Structural Analysis-II
3150610
Concrete Technology
3150611
Transportation Engineering

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About this paper

Official Gujarat Technological University (GTU) examination paper for Design of Structures (Summer 2025, B.E. · Civil Engineering, Sem 5). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.

Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.

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