Abstract- Structural Engineering Project modeled by RISA

The purpose for this project was to create one or more structures using concrete, steel, and wood. Using RISA software, we were to create a realistic structure and assign realistic loads to the structure to ensure each member (as well as the entire structure) would surpass the allowable stresses provided by the codes. I chose to create two structures. The first structure I designed was a single-story ranch-style house designed with only wood. For my other structure, I chose to create a model of a bridge. The materials I used for my bridge were steel and concrete.

Using AutoCAD, I designed a floor plan of the house and added dimensions. After this, I created a plan for the columns. Since it is a single-story house with minimal superstructure load, I decided to keep the columns on the outside so that I could maintain an open space floor plan. Next, I used RISA software to create my model. By researching common materials and sizesI used section sets in RISA to detail a list of structural components. In the following pages, you will see the dimensions of wood I used, the material properties, its shear/moment/deflection diagrams, and if it passed the code. I then designed my structure according to my column plan and added outside girders, inside beams, floor joists, interior/exterior walls, and trusses to support the roof load. I designed it in a way to distribute the load evenly to the columns.

The next structure I modeled was a triple-span bridge. First, I researched different types of bridge designs using steel and concrete. I decided to create a bridge with concrete columns and steel girders. I wanted to make it a relatively long bridge, because it was three spans. The overall length of the bridge is 90’, and 30’ wide to accommodate for two 12’ lanes, and two 3’ shoulders. The middle columns were designed at a greater height so their base could be placed in the water. I also created the pier connectors and the beam supports so the load from the superstructure and live traffic could be evenly distributed to the piers and down to the ground.

  The purpose of this final report is to summarize the final structural project. This project consisted of creating a floor plan using AutoCAD and a 3D model of a structure using RISA 3D. It is required that the structure contains steel members, wood members, and concrete members. The inspiration of this project came from the 1989 cartoons The Simpsons. The structure in this project is supposed to model the Simpson’s home shown in the TV series. 

A two-story simple residential structure is wanted in Southern Pennsylvania. This structure must be able to withstand the proper dead, live, wind, and snow loads for the indicated area. For proper market placement of a single-family home, the structure will have at least two bedrooms and two bathrooms and have a livable space of at least 1,500 square feet. Through proper column placement and material choice, a cost-effective plan will be developed. After the support structure is completed, a contracting team with continue to work on the walls, electric, plumbing, and other finishing details to complete the single-family home and sell the site for a maximum profit.

 The objective of this project was to complete a floor plan in AutoCAD and structure made of wood, concrete, and steel in Microsoft Risa. The structure chose was a one bed, one bath, and single floor residential home. The design itself was not difficult, the design of the materials was challenging. Finding the right size of the steel beam girders and wooden boards for the trusses while still keeping the prices down. The Then also calculated the live loads on the roof using the weight of 5/8 plywood, shingles, and the standard max snow load for western Pennsylvania. The last step was to calculate the cost of all of the materials. It is not the cost of the house overall since it does not include the pay of the laborers. 

 The objective presented was to model and create a structure out of wood, steel, and concrete whether these three materials would be combined into one structure or if three different structures would be created was free of choice. This particular project uses the materials separately and so the same structure was created three times once out of wood, once out of steel and once out of concrete. The structure created was made to be a warehouse that is 100 feet wide, 180 feet long and 50 feet high, including two indoor soccer courts, a small office space and a bathroom for each gender. The structure could be made with all three materials with wood being the cheapest of the three structures made followed by concrete and then steel being the most expensive at $589367. Each structure had dead loads and live loads applied to it with concrete undergoing the least deflection making it the most stable and wood undergoing the most deflection making it the least stable. Comparing the stability and cost effectiveness of each structure it was found that concrete would be best choice of material as it provided the most stability and a price that seems reasonable for a building such as the one chosen.  

  In many southern states, where tornadoes are common, homes are often lacking basements to protect residents from these storms. This occurs due to the water table or bedrock existing close to the surface. This often causes the construction of basements to be either complicated or cost prohibited. For this reason, homes are often designed with rooms that will withstand tornados that could cause catastrophic home damage while protecting the occupants. The structure is a two-story single family residence that will be built in Oklahoma with a spacious concrete storm shelter in the center of the ground level that will serve daily as an additional room. The floor plan in figure 1 shows the floor plan of this home using AutoCAD software.

  This report will discuss multiple aspects of my structure design. The structure needed to have multiple materials including wood, steel, and concrete. The design resulted in a structure known as a pole barn which had several unique aspects during the design process. The first aspect that will be discussed is the inspiration as well as the overall design process for the structure. Afterward, there will be structural analysis on each unique member to make sure the building is structurally sound. The final aspect will be the cost analysis regarding the members used in the design as well as other aspects involving utilities and labor.

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For my project I decided to do it on one of several houses I used to live in. the house I decided to do it on was a house in the Philippines. The reason for my choice is because I thought it would be neat. Being a house out of the states. In the project you will see a floor plan of the house I am modeling. There will be photos provided to see the real house. A skeleton 3d model was created in RISA, to get an idea of what the house looks like based on members used to create the house. In the report you will see the forces acting on the house, internal forces, cost analysis of the model, and member analysis.