Day 10 of 11 — Class 10

Practice
Continued

Final session before Exam 2. Consolidate your building frame model, try an alternate geometry, and make sure you can explain every number ETABS gives you.

Practice Model Refinement Exam 2 Prep CO1 & CO2
— Note

Day 11 is Exam 2 (Final)

The final exam covers Days 7–10. You will be asked to model, analyse, and interpret a building frame with lateral loads.

⚠ Exam 2 (Final) — Day 11  |  Topics: Multi-story frame, BNBC wind + seismic, load combos, drift check, design force extraction
01 — Why

What good modelling looks like

By now you should be able to build a 3D building frame from scratch in under 30 minutes. Use Day 10 to stress-test that skill.

Content Coming Soon Signs of a well-built model: analysis completes without warnings, base reactions sum correctly, drift is reasonable (not zero, not absurd), moment diagrams make intuitive sense.
02 — Concept

Course outcomes — what you've now achieved

Days 1–10 have built toward two course outcomes. Check them off.

CO1 — Structural Analysis

Model RC frames (beams, portal, multi-story building) in ETABS. Apply dead, live, wind, and seismic loads per BNBC. Extract moment, shear, axial forces, and drift.

CO2 — Bridge Loading

Model bridge portal frames. Apply AASHTO HL-93 truck and lane loads. Determine critical load positions and calculate Strength I combination forces.

03 — Walkthrough

Day 10 challenge problems

Attempt at least one of these before the exam.

Challenge Problems Coming Soon Problem A: Irregular 4-story frame (asymmetric plan) — where does the centre of rigidity shift? Does torsion appear under symmetric wind loading?

Problem B: Same building, change soil type from S2 to S3 in BNBC seismic. How does base shear change? Which columns are now overstressed?

Problem C: Add a shear wall to one bay. How does the drift profile change? What fraction of base shear does the wall carry?
04 — Check Yourself

Final self-assessment

Without opening ETABS, answer these on paper:

Final Review Quiz Coming Soon 15 questions — mix of calculation (base shear, drift ratio, story force distribution) and conceptual (what changes if you add a floor, why corner columns attract more moment under seismic, how a shear wall changes the lateral stiffness distribution).