- #1
Comfy
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Homework Statement
Calculate reaction forces for truss. Truss is attached in picture.
Homework Equations
ΣFx=o
ΣFy=0
ΣM about reaction point=0
The Attempt at a Solution
attached in picture
Unfortunately, the attached images are almost entirely illegible.Comfy said:Homework Statement
Calculate reaction forces for truss. Truss is attached in picture.
Homework Equations
ΣFx=o
ΣFy=0
ΣM about reaction point=0
The Attempt at a Solution
attached in picture
This truss is statically determinate now, and should be solvable, right? That is why I don't understand why I am having trouble solving for the support reactions.SteamKing said:Unfortunately, the attached images are almost entirely illegible.
If you want some help, either write out your calculations or post better images.
Comfy said:This truss is statically determinate now, and should be solvable, right? That is why I don't understand why I am having trouble solving for the support reactions.
ISteamKing said:What makes you think this truss is statically determinate? You're still trying to calculate four reactions using only two equations of statics.
I have 4 equations Sum of forces in y direction and theSteamKing said:What makes you think this
I have more than 2 equations, I have sum of forces in y and sum of moments about any of the supports. It is statically determinate because 2 (11 joints)=17 members+5 reactions. What do you mean by 2 equations of statics?SteamKing said:What makes you think this truss is statically determinate? You're still trying to calculate four reactions using only two equations of statics.
truss is statically determinate? You're still trying to calculate four reactions using only two equations of statics.
Your last post came out garbled. Can you repeat?Comfy said:I
I have 4 equations Sum of forces in y direction and the
I have more than 2 equations, I have sum of forces in y and sum of moments about any of the supports. It is statically determinate because 2 (11 joints)=17 members+5 reactions. What do you mean by 2 equations of statics?SteamKing said:Your last post came out garbled. Can you repeat?
You can write only one equation involving the sum of the forces and one equation summing the moments about one convenient reference point.Comfy said:I have more than 2 equations, I have sum of forces in y and sum of moments about any of the supports. It is statically determinate because 2 (11 joints)=17 members+5 reactions. What do you mean by 2 equations of statics?
To calculate reaction forces for a truss, you will need to use the equations of static equilibrium. These equations state that the sum of all forces in the x direction and the sum of all forces in the y direction must equal zero. By applying these equations to the truss, you can solve for the reaction forces at each support.
To calculate reaction forces for a truss, you will need to know the external loads acting on the truss, the geometry of the truss (lengths of each member and angles between them), and the location of the supports.
To verify the correctness of your calculated reaction forces, you can apply the equations of static equilibrium to the truss. If the calculated reaction forces satisfy these equations, then they are correct. You can also compare your results with those obtained from other methods or software.
If your truss is not in static equilibrium, then it means there is an error in your calculations or assumptions. Double check all the input data and equations used in your calculations. If you are still having trouble, seek help from a peer or a professional.
Yes, there are many software programs available that can calculate reaction forces for a truss. These programs use numerical methods and complex algorithms to solve for the reaction forces. However, it is still important to have a basic understanding of the equations and principles involved in order to interpret and verify the results obtained from the software.