DescriptionOne truss our group has chosen is Ryde Bridge. Ryde Bridge is located at Ryde over the Parramatta River. It is a truss bridge that was designed to replace the previous ferry service between Church St in Ryde and Concord Road in Rhodes. Furthermore, it was also constructed with a lift span so that tall ships would be able to travel through it unimpeded, however, the mechanism for this capability has been removed. Analysis1. 2D free body diagram2. Estimation of external loads From the 2D free body diagram:RL = approximately 45kN of force acting on the bridge. This is because it counteracts the weight for the bridge (possibly 80 tonnes including vehicles) as well as the force of the wind acting on the bridgeRR = approximately 42kN of force acting on the bridge. This is because it counteracts the weight of the bridge however does not counter the horizontal component of the force of the wind on the bridge.Force of wind = approximately 7kN of force actin on the bridge. This is because the bridge is high above the river where there are greater wind speeds and there are no obstacles that could act as wind breakers.Weight of the internal force (including vehicles) = approximately 80kN of force acting on the bridge. This is because the weight of the bridge in addition to vehicles on it will greatly increase the force acting on the supports.3. Types of supports We believe that there are 2 types of supports on the truss. These are a pin joint and a roller joint. We assume this because a bridge, especially the steel components, will expand and contract during extreme temperatures including expanding during hot temperatures. To counteract this, engineers will have put a roller joint on one of the supports so that the bridge can expand without putting additional force on the supports. The other support will be a pin joint because it can provide both the vertical components of the external loads as well as the horizontal components.4. Types of joints Bolt joints- Throughout the bridge, there are bolt joints connecting the various components of the bridge togetherWelded steel joints- On the steel beams, some have been welded together.5. Estimation of which members are in compression and tensionRepeats on the other side because of symmetryFirst we calculate the members around RL: RL

From this graphical solution, the bottom member would be in tension and the slanted member is in compressionUsing similar graphical solutions, we determined that the top member of the bridge was in compression.