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Enhanced Shear

This document contains shear checks for two reinforced concrete beams. The first beam passed the maximum shear stress check but failed the enhanced shear capacity check. The second beam passed both shear checks. The document provides the parameters used for each check, including the concrete grade, steel properties, beam geometry, loading and reinforcement details.

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John Paul Umali
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0% found this document useful (0 votes)
158 views2 pages

Enhanced Shear

This document contains shear checks for two reinforced concrete beams. The first beam passed the maximum shear stress check but failed the enhanced shear capacity check. The second beam passed both shear checks. The document provides the parameters used for each check, including the concrete grade, steel properties, beam geometry, loading and reinforcement details.

Uploaded by

John Paul Umali
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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ENHANCED SHEAR CHECK

Concrete Grade fcu = 40 N/mm2


fck = 32 N/mm2
Steel Stress fyk = 500 N/mm2
fctm = 3.024
Overall depth D = 0.85 m
Concrete Cover = 45 mm
Bar size = 25 mm
Effective depth d = 793 mm
Beam Width bw = 300 mm
Ultimate Load N = 1012 kN

Ultimate Limit State


Bar size = 32 mm
No of bar provided = 3
Steel Area Provided As,prov = 2413 mm2

Beam Shear Check


�_𝐸� ≤ PASS! (ref: SS EN 1992 2004
�_(𝑅�,𝑚𝑎�) FAIL! Clause 6.2.2)
𝛽�_𝐸� ≤
�_(𝑅�,𝑐)
(1) Maximum Shear Stress
�_𝐸� ≤
�_(𝑅�,𝑚𝑎�)
Shear Force, �_𝐸� 1012 kN
bw 0.300 m
�_(𝑅�,𝑚𝑎�) = 0.5 �_𝑤 � v 1128 kN (ref: SS EN 1992 2004
�_𝑐� [1− �_𝑐�/250]
�=0.6 Clause 6.2.2 (6))
�_𝑐� = �_𝑐𝑐
�_𝑐� /𝛾𝑐
(2), 𝛽�_𝐸� ≤
�_(𝑅�,𝑐)
Enhanced shear capacity factor (ref: SS EN 1992 2004
Clause 6.2.2 (6))
𝛽 = �_�∕2� 0.5� ≤ 𝑎_� ≤ 2d 𝑎_� =𝑠ℎ𝑜𝑟𝑡𝑒𝑠𝑡 �𝑖𝑠𝑡𝑎𝑛𝑐𝑒 �𝑒𝑡𝑤𝑒𝑒𝑛 �𝑎𝑐𝑒 𝑜� 𝑐𝑜𝑙𝑢𝑚𝑛 𝑡𝑜 𝑐𝑟𝑖𝑡𝑖𝑐𝑎𝑙 𝑠𝑒𝑐𝑡𝑖𝑜𝑛
(Input from sketch) 0.396 m
𝑎_� Actual Value -
𝛽 0.25
Reduced Shear Force 𝛽�_𝐸� 252.84 kN
�_(𝑅�,𝑐) = (0.12k("100" 𝜌�_𝑐� )^((1∕3) ))�_𝑤 �" "≥(0.035�^1.5 〖� _𝑐� 〗 ^0.5)�_𝑤 �" " (ref: SS EN 1992 2004
�=1+ √(200/�) ≤ Clause 6.2.2 (1))
2.0 1.502
𝜌_𝑙 = �_𝑠𝑙�/
(�_𝑤 �) ≤ 0.02 0.010
�_(𝑅 137 kN
�,𝑐)
ENHANCED SHEAR CHECK

Concrete Grade fcu = 45 N/mm2


fck = 35 N/mm2
Steel Stress fyk = 460 N/mm2
fctm = 3.210
Overall depth D = 0.60 m
Concrete Cover = 40 mm
Bar size = 25 mm
Effective depth d = 548 mm
Beam Width bw = 600 mm
Ultimate Load N = 1508 kN

Ultimate Limit State


Bar size = 25 mm
No of bar provided = 6
Steel Area Provided As,prov = 2945 mm2

Beam Shear Check


�_𝐸� ≤ PASS! (ref: SS EN 1992 2004
�_(𝑅�,𝑚𝑎�) PASS! Clause 6.2.2)
𝛽�_𝐸� ≤
�_(𝑅�,𝑐)
(1) Maximum Shear Stress
�_𝐸� ≤
�_(𝑅�,𝑚𝑎�)
Shear Force, �_𝐸� 524 kN
bw 0.600 m
�_(𝑅�,𝑚𝑎�) = 0.5 �_𝑤 � v 1681 kN (ref: SS EN 1992 2004
�_𝑐� [1− �_𝑐�/250]
�=0.6 Clause 6.2.2 (6))
�_𝑐� = �_𝑐𝑐
�_𝑐� /𝛾𝑐
(2), 𝛽�_𝐸� ≤
�_(𝑅�,𝑐)
Enhanced shear capacity factor (ref: SS EN 1992 2004
Clause 6.2.2 (6))
𝛽 = �_�∕2� 0.5� ≤ 𝑎_� ≤ 2d 𝑎_� =𝑠ℎ𝑜𝑟𝑡𝑒𝑠𝑡 �𝑖𝑠𝑡𝑎𝑛𝑐𝑒 �𝑒𝑡𝑤𝑒𝑒𝑛 �𝑎𝑐𝑒 𝑜� 𝑐𝑜𝑙𝑢𝑚𝑛 𝑡𝑜 𝑐𝑟𝑖𝑡𝑖𝑐𝑎𝑙 𝑠𝑒𝑐𝑡𝑖𝑜𝑛
(Input from sketch) 0.274 m
𝑎_� Actual Value -
𝛽 0.25
Reduced Shear Force 𝛽�_𝐸� 131.07 kN
�_(𝑅�,𝑐) = (0.12k("100" 𝜌�_𝑐� )^((1∕3) ))�_𝑤 �" "≥(0.035�^1.5 〖� _𝑐� 〗 ^0.5)�_𝑤 �" " (ref: SS EN 1992 2004
�=1+ √(200/�) ≤ Clause 6.2.2 (1))
2.0 1.604
𝜌_𝑙 = �_𝑠𝑙�/
(�_𝑤 �) ≤ 0.02 0.009
�_(𝑅 199 kN
�,𝑐)

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