Hand Analysis of Bridge
Bridge with all Calculated Forces
Bridge Made in Bridge Designer
To get the results of the hand analysis to correspond to online Bridge Designer we had to try to get the member lengths and angles as accurate as we could without actually being able to measure it out. Also since in my calculations I had changed the units of the load to Newtons for force I had to make sure that I put the Newton value in for the load instead of the pounds. By scaling the bridge on bridge designer to the best of my ability I was able to approximate a theoretical value for all the forces acting on the bridge. Comparing the values I calculated to the values that were given in bridge designer it seems that our calculations are relatively accurate. Some of the forces are slightly inaccurate; this error probably came from the rounding done during the hand analysis. Also, the “scaling” of the bridge on bridge designer could have probably been a little more accurate.
Knex Bridge without Forces
Knex Bridge with Forces
For our Knex truss that was made using Bridge Designer the load that was applied was measured in pounds so all the forces are according to that unit. Other than that it is the same as the other bridge that we made in bridge designer. We approximated the lengths of each beam as well as the angles between the beams as well as we could to get the approximate theoretical force that is applied on each of the beams. This information also tells us with beams have compression forces and which have tension forces.
The information given to us by the hand analysis and the testing information about Knex joints will enable us to be able to build a better bridge. The hand analysis and bridge designer tell us which beams will break because of too much force on them. It also tells us which beams have no force on them. We can remove these beams from our design since they are not significantly helping the bridge. With the testing information about Knex joints as well as the calculation giving us the forces we know how much force it will take for a beam to slip out of its gusset plate. This will help in the aspect that we will know how to most efficiently arrange the beams and gusset plates so that the bridge will be able to hold the greatest amount of weight without collapsing from too much force or from beams falling out of the gusset plates.
Bridge with all Calculated Forces
Bridge Made in Bridge Designer
To get the results of the hand analysis to correspond to online Bridge Designer we had to try to get the member lengths and angles as accurate as we could without actually being able to measure it out. Also since in my calculations I had changed the units of the load to Newtons for force I had to make sure that I put the Newton value in for the load instead of the pounds. By scaling the bridge on bridge designer to the best of my ability I was able to approximate a theoretical value for all the forces acting on the bridge. Comparing the values I calculated to the values that were given in bridge designer it seems that our calculations are relatively accurate. Some of the forces are slightly inaccurate; this error probably came from the rounding done during the hand analysis. Also, the “scaling” of the bridge on bridge designer could have probably been a little more accurate.
Knex Bridge without Forces
Knex Bridge with Forces
For our Knex truss that was made using Bridge Designer the load that was applied was measured in pounds so all the forces are according to that unit. Other than that it is the same as the other bridge that we made in bridge designer. We approximated the lengths of each beam as well as the angles between the beams as well as we could to get the approximate theoretical force that is applied on each of the beams. This information also tells us with beams have compression forces and which have tension forces.
The information given to us by the hand analysis and the testing information about Knex joints will enable us to be able to build a better bridge. The hand analysis and bridge designer tell us which beams will break because of too much force on them. It also tells us which beams have no force on them. We can remove these beams from our design since they are not significantly helping the bridge. With the testing information about Knex joints as well as the calculation giving us the forces we know how much force it will take for a beam to slip out of its gusset plate. This will help in the aspect that we will know how to most efficiently arrange the beams and gusset plates so that the bridge will be able to hold the greatest amount of weight without collapsing from too much force or from beams falling out of the gusset plates.
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