Modelling skill is built through repetition. Day 3 is specifically a practice day — the goal is speed and confidence, not new theory.
Content Coming Soon
Why continuous beams are harder: moment continuity at supports, stiffer response, interior support reactions larger than simple span.
02 — Concept
Continuous beams and moment redistribution
A continuous beam has more reactions than equations — it's statically indeterminate. ETABS solves this with the stiffness method.
Content Coming Soon
Indeterminate vs. determinate beams. Negative moments over interior supports. How fixing one end changes the entire moment diagram.
03 — Walkthrough
Practice problems for Day 3
Complete both problems in ETABS, then verify with hand calculations.
Problems Coming Soon
Problem 1: Two-span continuous beam (4m + 6m), UDL = 15 kN/m on span 1 only.
Problem 2: Three-span beam with point load at midspan of centre bay. Compare fixed vs. pinned end conditions.
04 — Check Yourself
Can you explain what happened?
Before closing ETABS, answer out loud:
Discussion Prompts Coming Soon
Why is the midspan moment in a continuous beam less than wL²/8? Where does the "missing" moment go? What changes if you add a settlement at the interior support?