Civil Engineering: Civil engineering focuses on the planning, design, construction, and operation of civilian infrastructure like transit systems and space satellites. It utilizes advanced technology and computer-aided design (CAD) to solve problems related to pollution, traffic, and urban development. The field includes seven major disciplines: structural, environmental, geotechnical, water resources, transportation, construction, and urban planning. Civil engineers use advanced materials and technologies to better structural performance and sustainability. A bachelor's degree in engineering is typically required, and career opportunities are growing due to infrastructure needs and population growth.
Building Science: Building science studies the performance of buildings, including structural analysis, materials characterization, and understanding forces and stresses. Structural analysis uses geometry and physics to break down complex systems and determine system capabilities, such as in truss bridges. Material properties like elasticity, compression, and tension are extremely important for designing durable structures. Elastic materials return to their original shape after stress, while inelastic materials do not. This field ensures safety and durability in construction by understanding how different materials respond to forces.
Define the problem
Generate alternative solutions
Evaluate and select a solution
Detail the design
Defend the design
Manufacture and test the design
Evaluate the performance of the design
Prepare the final design report
Structure Design
Our bridge was built with: a Deck 12 meters above water, Standard abutments, Medium strength concrete, the Standard two lanes, a Pratt Through Truss design, and Carbon steel components.
Our bridge was built to fulfill the following requirements: Compression force/strength ratio cannot exceed .40 (+/-.01), Tension force/strength ratio cannot exceed .45 (+/-.01), 15% of bridge of members hollow tubes (+/- 1%), and Lowest possible cost.
Before doing our net force calculations, we made a drawling to help us visualize the calculations we needed to do.
Here are our calculations of the net forces which include the compression and tension on each joint. To calculate the angles we used trigonometry and for the net forces, we used vector addition.
3-D Printed Bridge
We designed our 3-D Printed Bridge Bridge in TinkerCAD utilizing a Truss Bridge design.
We printed our design with PLA filament.
4-Foot Balsa Wood Bridge
Our bridge collapsed after carrying 8 1/2 bricks. We determined that one of the diagonal truss member was the first to fail. Multiple truss members failed before the bridge ultimately collapsed.
We designed our Bridge on paper utilizing a Truss Bridge design to fulfill these requirements: 4-foot balsa wood bridge, spans a 3-foot space, minimum clearance of 1ft across the span, hinge roller end supports, and to achieve the maximum load capacity possible.
Index Card Bridge
After all the design iterations detailed in the worksheet, this is what our final bridge looked like.
Our index card bridge ended up holding 20 bolts with its final design.
Research Paper
Discussion Questions