Past Year Questions: Compression Members | Topic wise GATE Past Year Papers for Civil Engineering - Civil Engineering (CE) PDF Download

Q1: The elements that DO NOT increase the strength of structural steel are [GATE CE 2024 SET-1]
(a) Carbon
(b) Manganese
(c) Sulphur
(d) Chlorine
Ans: 
(c, d)
Increase in carbon content increases the strength of steel. Also, manganese increases the strength of structural steel.
However, chlorine and sulphur do not increase the strength of structural steel.
Hence, the correct option (C) and (D).

Q1: The critical bending compressive stress in the extreme fibre of a structural steel section is 1000 MPa. It is given that the yield strength of the steel is 250 MPa, width of flange is 250 mm and thickness of flange is 15 mm. As per the provisions of IS: 800-2007. the non-dimensional slenderness ratio of the steel cross-section is    [2019 : 2 Marks, Set-ll]
(a) 0.50
(b) 0.75
(c) 0.25
(d) 2.0
Ans: 
(a)
Past Year Questions: Compression Members | Topic wise GATE Past Year Papers for Civil Engineering - Civil Engineering (CE)

Q2: A steel column is restrained against both translation and rotation at one end and is restrained only against rotation but free to translate at the other end. Theoretical and design (IS:800- 2007) values, respectively, of effective length factor of the column are    [2019 : 1 Mark, Set-ll]
(a) 1.0 and 1.2
(b) 1.2 and 1.0
(c) 1.0 and 1.0
(d) 1.2 and 1.2
Ans:
(a)

Q1: A steel member ‘M ’ has reversal of stress due to live loads, whereas another member ‘N’ has reversal of stress due to wind load. As per IS 800 : 2007, the maximum slenderness ratio permitted is    [2015:1 Mark, Set-II]
(a) less for member ‘M ’ than that of member ‘N’
(b) more for member ‘M' than for member ‘N’
(c) same for both the members
(d) not specified in the Code
Ans: 
(a)
As per IS 800 : 2007
Past Year Questions: Compression Members | Topic wise GATE Past Year Papers for Civil Engineering - Civil Engineering (CE)

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FAQs on Past Year Questions: Compression Members - Topic wise GATE Past Year Papers for Civil Engineering - Civil Engineering (CE)

1. What are compression members in structural engineering?
Ans.Compression members are structural elements that are designed to carry loads primarily through axial compression. They typically include columns, struts, and certain types of beams that can experience compressive forces. These members are crucial in supporting structures and ensuring stability.
2. How do you calculate the buckling capacity of a compression member?
Ans.The buckling capacity of a compression member can be calculated using Euler's formula, which considers the length, cross-sectional area, and moment of inertia of the member. The critical load at which buckling occurs is given by P_cr = (π²EI) / (L_eff)², where E is the modulus of elasticity, I is the moment of inertia, and L_eff is the effective length of the member.
3. What factors influence the design of compression members?
Ans.Factors influencing the design of compression members include material properties (such as yield strength and modulus of elasticity), slenderness ratio, effective length, cross-sectional shape, and the type of loads applied (static or dynamic). Additionally, considerations for stability and potential buckling modes are crucial.
4. What is the role of the slenderness ratio in compression members?
Ans.The slenderness ratio is a critical factor in the design of compression members, defined as the effective length divided by the radius of gyration. A higher slenderness ratio indicates a greater susceptibility to buckling. Designers use this ratio to determine whether a member will behave as a short or slender column, which impacts the design approach and strength calculations.
5. What types of materials are commonly used for compression members?
Ans.Common materials used for compression members include steel, reinforced concrete, and timber. Steel is favored for its high strength-to-weight ratio, while reinforced concrete provides durability and compressive strength. Timber is often used in smaller structures due to its aesthetic appeal and ease of construction.

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