How to Calculate the Maximum Bending Moment of a Simply Supported Beam with UDL?

AI Thread Summary
To calculate the maximum bending moment of a simply supported beam under a uniformly distributed load (UDL) of 40 kN/m, the maximum moment occurs at the midpoint, 3.5 m from the left end. The user attempted to calculate it using the formula +(p*d)-(ws)(GX) but was unsure about their approach. They were advised to create a shear diagram and convert the UDL into a point load for accurate calculations. Properly applying these methods will yield the correct bending moment value in kNm. Accurate calculations are essential for structural analysis in engineering.
Dustybin
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A simply supported beam is loaded with a uniformly distributed load (UDL) W=40 kN/m from C to D. The maximum Bending Moment value occurs at the mid-length of the beam, i.e. 3.5 m from the left hand end A. What is the value of the maximum bending moment? Give your answer in kNm, with 1 decimal place.
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Welcome to PF!

Hi Dustybin! Welcome to PF! :wink:

Show us what you've tried, and where you're stuck, and then we'll know how to help! :smile:
 


Yep. Thanks. I have tried to calculate the it using +(p*d)-(ws)(GX). For this question, i used, (120*3.5)-(40*3)(1.5). Did i did anything wrong?
 
Did you construct a shear diagram for your problem first?
 
Turn the UDL into a point-load.
 

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