In this project, to revisit and keep upto date with standards and methods, Gaurav proactively is designing a Special Moment Frame (SMF) 10 story hotel building. The Framing is designed using Wide Flanged Steel Sections along with perimeter surrounded by Concrete Shear Wall. For this, Gaurav displayed a extra ordinary display of using RAM, ETABS, SAFE, REVIT, RHINO and GRASSHOPPER software and their interoperability features to design and model this building. The building location is in San Fransisco, CA to consider both Seismic And Wind Design. Gaurav assumed some architectural constraints based on other hotels and their standard design to depict real project challenges. Thus, with proper understanding of load path, Gaurav designed this building while trying to keep load path simple to transfer loads to ground without much complexity and also keeping material usage to minimum to reduce embodied carbon.
Gaurav used Revit 2022 to draft this framing plan for 1st floor and subsequent floors as well. The floor floor height is 9.25 ft for floor 1 to 8 and 13 ft for floor 9 and 10. The structural floor plan for floor 2 to 8 is same and structural floor plan for floor 9, 10 , lobby and roof are different. Floor 9 contains balcony and spiral stairs connected to floor 10 internally creating duplex rooms. Gaurav applied dead, live, partition, lateral, etc, and load combinations based on ASCE 7.
After modelling and analyzing building in ETABS, Gaurav used interoperability feature to export SAFE model for first floor to SAFE. Then, he perfomed slab design in SAFE and got above deflection diagram.
After analyzing and designing the one way slab as 6"thick concrete slab, Gaurav used 5ksi LW Concrete and Grade 75 Rebar steel for steel. Using #6 for reinforcements, he spaced rebars at 2" at top and 4" at bottom.
Gaurav also displayed his knowledge of ETABS by designing the steel columns and composite steel beams in ETABS. The total area of the building is 59000SF. Walls around are 8.25" thick but Gaurav is in midst to design them and a MAT foundation for the building.
The columns are made of steel and Gaurav was WF Sections from AISC Steel Manual 15th edition. Gaurav used W12X106 for floor below lobby where underground parking is assigned. Then, Gaurav used W10X88 on floors 1 to 8. For Floor 9 and above, Gaurav used a W8X31 section. Using different sections at different intervals saves weight and material. Above diagram is PMM Ratio or interaction equation ratio for each column designed.
Similarly, Gaurav also performed Composite Beam Design between Steel Beams connected to concrete slab using shear studs, Gaurav used W10X54 beams in longitudinal direction. He also provided W10X45 in transverse direction for effective load path.
Gaurav then tried his hands successfully at parametric modelling in Grasshopper to create Spiral Stairs for any radius, height, pitch and steps. He plugged this stairs in this building model as well.
These are Grasshopper models he has built till now using parametric modelling.
Now using interoperability features, he plugged in this spiral staircase on Floor 9 and performed rendering in RHINO to create above floor view.
Next, Gaurav plans to do A 3D Walkthrough of whole building in REVIT for both architectural and structural 3D models. He also plans to complete Wall and foundation design. And thus gain more insights about building design to pursue his passion Gaurav will also used Athena Impact to calculate embodied carbon for this building and then revisit design to reduce carbon where he can. Gaurav will also use Autodesk BIM 360 to learn BIM as well.
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