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Cons Stage Ult

The document provides a structural analysis for the TMbeam-26m of the Bridge Sungai Muda, detailing construction stage stresses under ultimate limit state conditions. It includes calculations for hogging and sagging moments, with strain and stress summaries for various locations within the beam. The ultimate capacities of the section are calculated as -474.373 kN.m for hogging and 4724.264 kN.m for sagging, indicating the need for adequate design under applied loads.

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idah135
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8 views2 pages

Cons Stage Ult

The document provides a structural analysis for the TMbeam-26m of the Bridge Sungai Muda, detailing construction stage stresses under ultimate limit state conditions. It includes calculations for hogging and sagging moments, with strain and stress summaries for various locations within the beam. The ultimate capacities of the section are calculated as -474.373 kN.m for hogging and 4724.264 kN.m for sagging, indicating the need for adequate design under applied loads.

Uploaded by

idah135
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Job: Bridge Sungai Muda Job No.

: 148
Beam: TMbeam- 26m Calc. By: Aqila
Checked:
Data File: \\zar-storage\Eng\2. PROJECTS\31. Paya Keladi\TMBeam26mRev.sam 6/5/2025 2:25:09 PM

Design code: BS 5400-4:1990


Analysis: Construction stage stresses
Ultimate Limit State Load Combination 1
Prestress Classification: Class 1 - clause 4.1.1.1.
Section Ref 1 at 13m from left end of beam

Section details:
Ref 1 "Section 1"
at 0.5 x span = 13 m from left end of beam
Analysis:
Construction stage stresses
Ultimate Limit State
Load Combination 1

—————————————————————————————————————————————————————————————————
ULS Stress / Strain summary for section with HOGGING moment
—————————————————————————————————————————————————————————————————

height of neutral axis = 393.398 mm

at centroid of outermost 25% of tendon area:


height = 1040.0 mm
strain in PC concrete = -0.0153
initial strain in tendon = -0.0058
total strain in tendon = -0.0212

yield strain = -0.005 - fpu /Es .γm = -0.0131

Tendons are fully yielded, therefore the full ultimate capacity may be applied
to the section. (clause 6.3.3.1)

————————————————————————————————————————————————————————————
Location strain stress height
N/mm² mm
————————————————————————————————————————————————————————————
Precast beam - top -0.016769 0.0 1120.0
- bottom 0.0035 26.8 0.0
In situ stage 1 - top -0.020389 0.0 1320.0
- bottom -0.016769 0.0 1120.0
Tendon - top -0.022149 -1617.4 1040.0
- bottom -0.003415 -682.98 60.0

Ultimate capacity of section = -474.373 kN.m

—————————————————————————————————————————————————————————————————

SAM v6.60e
Copyright © 2025 Bestech Systems Ltd 6/5/2025 15:30 1
Job: Bridge Sungai Muda Job No.: 148
Beam: TMbeam- 26m Calc. By: Aqila
Checked:
Data File: \\zar-storage\Eng\2. PROJECTS\31. Paya Keladi\TMBeam26mRev.sam 6/5/2025 2:25:09 PM

Design code: BS 5400-4:1990


Analysis: Construction stage stresses
Ultimate Limit State Load Combination 1
Prestress Classification: Class 1 - clause 4.1.1.1.
Section Ref 1 at 13m from left end of beam

ULS Stress / Strain summary for section with SAGGING moment


—————————————————————————————————————————————————————————————————

height of neutral axis = 405.93 mm

at centroid of outermost 25% of tendon area:


height = 60.0 mm
strain in PC concrete = -0.0017
initial strain in tendon = -0.0058
total strain in tendon = -0.0075

yield strain = -0.005 - fpu /Es .γm = -0.0131

Tendons are not fully yielded, therefore the section must be adequate for 1.15
times the ultimate applied loads. (clause 6.3.3.1)

————————————————————————————————————————————————————————————
Location strain stress height
N/mm² mm
————————————————————————————————————————————————————————————
Precast beam - top 0.0035 26.8 1120.0
- bottom -0.00199 0.0 0.0
In situ stage 1 - top 0.0044803 28.6296 1320.0
- bottom 0.0035 17.8667 1120.0
Tendon - top -0.00372 -744.04 1040.0
- bottom -0.007525 -1345.5 60.0

Ultimate capacity of section = 5432.904/1.15


= 4724.264 kN.m

End

SAM v6.60e
Copyright © 2025 Bestech Systems Ltd 6/5/2025 15:30 2

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