- #1
foo9008
- 678
- 4
Homework Statement
how the author found the maximum moment = 0.29MNm ? is there any formula ? how to find it in this question ?
Of course there's a formula. That's what beam tables are for - too look up things like the maximum B.M. without having to work them out from scratch all the time.foo9008 said:Homework Statement
how the author found the maximum moment = 0.29MNm ? is there any formula ? how to find it in this question ?
Homework Equations
The Attempt at a Solution
the shape is rectangular cross section , am i right ? why the moment shouldnt' be a(b^3) / 12 ? but , a(b^2) / 8 ?SteamKing said:Of course there's a formula. That's what beam tables are for - too look up things like the maximum B.M. without having to work them out from scratch all the time.
Here is a set of typical beam tables:
http://www.awc.org/pdf/codes-standards/publications/design-aids/AWC-DA6-BeamFormulas-0710.pdf
Your beam is Figure 1, page 4.
BTW, the calculation of the total weight of the wall above has a small error. W = 0.145 MN, rather than 0.145 kN.
The problem is trying to figure out the dimensions of the cross section of the beam so that max. bending stress is limited to 7.5 MPa.foo9008 said:the shape is rectangular cross section , am i right ? why the moment shouldnt' be a(b^3) / 12 ? but , a(b^2) / 8 ?
The Max Bending Moment is the maximum value of the internal bending moment that occurs in a member or structure. It is a critical factor in determining the strength and stability of a structure.
The Max Bending Moment is calculated by multiplying the maximum load applied to the structure by the distance from the point of support to the point of maximum bending. This calculation is based on the principles of statics and the bending moment equation.
The formula for calculating Max Bending Moment is M = W x d, where M is the bending moment, W is the maximum load applied, and d is the distance from the point of support to the point of maximum bending.
The Max Bending Moment is important because it helps engineers and designers determine the strength and stability of a structure. It also helps them choose appropriate materials and dimensions for the structure to ensure it can withstand the expected loads and forces.
The Max Bending Moment is used in structural design to ensure that the structure can withstand the expected loads and forces without failing or experiencing excessive deformations. It is also used to determine the appropriate size and shape of structural members to ensure they can resist the bending moment without buckling or breaking.