# a beam section is classed as low shear case when the factored shear force is less than

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## Low and high shear

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## Low and high shear

The shear verification affects bending and axial resistances according to EN 1993-1-1. The "**low shear**" is defined by the following condition:

Where is:

The shear force

The shear resistance

Otherwise, "**High shear**" appears. If there are shear shear forces due to torsion in the cross-section, the value of resistance (reduced value due to torsion, described in the chapter "**Shear stress due to torsion**") is used instead of the resistance . The design values of the axial and bending resistances are reduced for "**High shear**". The reduction is based on the reduction factor for yield strength according to the following formula

Where is:

The reduction factor making an allowance for the presence of shear forces

The yield strength

The reduction factor is given by formula

or by the expression

for shear due to torsion

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## [Solved] A beam section is classed as low shear case when the factore

Concept: According to IS code: 800-2007 clause no: 8.2.1.2 When the factored design shear force does not exceed 0.6 Vd where Vd is the design shear

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## A beam section is classed as low shear case when the factored shear force is less than:

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0.4 Vd 0 Vd 0.6 Vd 0.8 Vd

## Answer (Detailed Solution Below)

Option 3 : 0.6 Vd

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## Detailed Solution

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**Concept:**

**According to IS code: 800-2007 clause no: 8.2.1.2**

When the factored design shear force does not exceed **0.6 Vd** where Vd is the design shear strength of the cross-section.

The design bending strength Md can be taken as

β γ Md = βbZpfyγmo

To avoid irreversible deformation under serviceability loads, Md shall be less than

γ 1.2 Ze fyγmo

incase of simply supported and

γ 1.5 Ze fyγmo

in cantilever beams;

where,

βb = 1.0 for plastic and compact sections;

βb = ZeZp

for semi-compact sections;

ZP, Ze. = plastic and elastic section modulus of the cross-section, respectively.

fy = yield stress of the material.

γmO = partial safety factor.

A beam section is classed as a low shear case when the factored shear force is less than **0.6Vd.**

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## More Beams Questions

**Q1.**Rolled steel beams are designed by Indian standards in terms of

**Q2.**A beam consisting of two or more materials rigidly connected to each other preventing any slip between them during bending is called

**Q3.**The maximum deflection in steel beams should not exceed

**Q4.**The angle of dispersion of load in web buckling of beam is

**Q5.**Which of the following is the most efficient and economical section used as a beam?

**Q6.**In industrial buildings, the permissible maximum vertical deflection (under serviceability) for purlins /Girts of length 3.6 m, supporting elastic cladding, for design load(live load/wind load), as per IS 800:2007 is:

**Q7.**If

Av= Shear area और fyw=

The yield power of PETA (web), then what will be the designated hypoelastic shear resistance

(Vp) under pure shear?

**Q8.**If Md = design bending strength of the section, then what will be the factored design moment M at any section in the beam due to external actions?

**Q9.**Which of the following structural members is subjected to both tension and deflection?

**Q10.**The span length of a flexural member in a continuous frame system shall be taken as the distance between:

## Laterally Supported Beams Design Strength Questions and Answers

This set of Design of Steel Structures Multiple Choice Questions & Answers (MCQs) focuses on “Design Strength of Laterally Supported Beams – I”. 1. Which of the following aspects need not be considered for beam design? a) deflection b) material of beam c) buckling d) lateral supports 2. The design bending strength of laterally supported ... Read more

## Design of Steel Structures Questions and Answers – Design Strength of Laterally Supported Beams -I

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This set of Design of Steel Structures Multiple Choice Questions & Answers (MCQs) focuses on “Design Strength of Laterally Supported Beams – I”.

1. Which of the following aspects need not be considered for beam design?

a) deflection b) material of beam c) buckling d) lateral supports View Answer

2. The design bending strength of laterally supported beams is governed by

a) torsion b) bending

c) lateral torsional buckling

d) yield stress View Answer

3. The web is susceptible to shear buckling when d/tw

a) <67ε b) < 2×67ε c) >67ε d) < 70ε View Answer

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4. When there is no shear buckling,

a) Vp = Vn b) Vp > Vn c) Vp < Vn d) Vp = 2Vn View Answer

5. Plastic shear resistance is given by

a) fy/√3

b) shear area x fy x √3

c) shear area x fy/√3

d) shear area / (fy/√3)

View Answer

Check this: Civil Engineering MCQs | Design of Steel Structures Books

6. The design shear strength is given by

a) Vn b) Vn/γm0 c) Vn x γm0 d) γm0 View Answer

7. The web area will be fully effective when shear force V

a) ≥ 0.6Vd b) < 0.6Vd c) ≤ 0.6Vd d) >2×0.6Vd View Answer advertisement

8. Which of the following is true about sections with high shear case V>0.6Vd ?

a) web area is ineffective

b) web area is fully effective

c) flanges will not resist moment

d) moment is not reduced

View Answer

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To practice all areas of Design of Steel Structures, here is complete set of 1000+ Multiple Choice Questions and Answers.

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