Civil Engineering
Focused lecture guides with simulations, solved problems, and visual explanations. No fluff.
⚙️ Interactive Simulations
📝 Step-by-Step Solutions
🎓 Worked Problems
📚 Formula Sheets
Design of Concrete Structures — 15th Edition Workbook
Cracked section analysis, the k & j method, beam geometry, and design from scratch. Interactive simulations and 3 fully worked problems.
01Why Reinforced Concrete
02Mix Design & Unit Weights
03Loads & Safety Factors
04Beam Geometry & Cover
05Three Stages of Loading
06Transformed Section Method
07WSD Analysis (k & j)
08WSD Design Procedure
09Worked Problems (3)
10Formula Sheet
Darwin, Dolan & Nilson 15th Ed. All 17 sections with analogies, canvas simulations, sliders, and 4 quick-check quizzes.
2.1Introduction
2.2Cement & Hydration
2.3Aggregates
2.4w/c Ratio & Mix Design
2.5Placing & Curing
2.6Quality Control
2.7Admixtures
2.8Compression & Stress-Strain
2.9Tensile Strength
2.10Combined Stress
2.11Shrinkage & Creep
2.12High-Strength Concrete
2.13Steel for Concrete
2.14Reinforcing Bars
2.15Welded Wire Reinforcement
2.16Prestressing Steels
2.17Fiber Reinforcement
All 6 sections — design philosophy, ACI code logic, the 4 core RC assumptions, axial load behavior, and elastic beam bending — with interactive calculators and 3 quizzes.
3.1Introduction to Design
3.2Members & Sections
3.3Theory, Codes & Practice
3.4Fundamental Assumptions
3.5Behavior Under Axial Loads
3.6Bending of Homogeneous Beams
★Column Load Calculator
★Bending Stress Visualizer
★3 Quick-Check Quizzes
★ACI Load Factor Examples
Whitney stress block, beam failure modes, ρ limits, Mn calculator, Rn design aids — all 7 sections with live canvas diagrams, 4 quizzes, and interactive calculators.
4.1Introduction & Design Goals
4.2RC Beam Behavior (3 Stages)
4.3Whitney Stress Block
4.4Failure Modes & φ Factors
4.5ρ Limits & ACI Rules
4.6Analysis & Design Procedure
4.7Rn Design Aid Tables
4.8Rn–ρ Chart
★3-Stage Beam Visualizer
★Live Mn Calculator
★ρ Limits Visualizer
★4 Quick-Check Quizzes
Mr. Mohammad Nazmul Islam — CEE335 Lectures
What concrete is, how it’s made, what governs its strength, and why steel is its ideal reinforcing partner. Includes 6 interactive calculators and 6 canvas animations.
01What is Reinforced Concrete?
02Concrete Constituents & Cement
03Water-Cement Ratio
04Compressive Strength f′c
05Modulus of Elasticity Ec
06Steel Reinforcement
★RC Beam Animation
★Hydration Animation
★Stress-Strain Curves
★6 Interactive Calculators
Plane sections, strain compatibility, crack formation, and the evolution of the stress block. The theoretical bedrock of every RC calculation.
01Plane Sections Assumption
02Strain Compatibility
03Crack Formation & Behavior
04Stress Block Evolution
05Whitney Stress Block
06Design vs Analysis
Transportation Engineering — CEE350
Traffic flow theory, PHF calculator, Webster’s signal timing, delay & LOS, queue analysis, gravity model, and mode split — with animated simulations and 20+ practice problems.
01Traffic Engineering Basics
02Road Classification
03Flow, Density & Speed
04Intersection Types
05Signal Phasing & Timing
06Green Splits & Offsets
07Saturation Flow Rate
08Lane Capacity
09Delay & Level of Service
10Trip Generation
11Trip Distribution
12Mode Split
★PHF Calculator
★Signal Timing Simulator
★Queue Analysis Tool
★20+ Practice Problems
The transportation engineering landing page — all lessons, key formulas (Webster’s C&sub0;, SSD, flow-density), and calculator index in one place.
01Traffic Flow Theory
02Webster’s Signal Formula
03Sight Distance (SSD)
04Gravity Model
05Mode Split
06All Lesson Index
Structural Analysis Lab — CEE335L (THK)
Industry-standard ETABS software for modelling RC buildings and bridges. Covers beam analysis, bridge portal frames with AASHTO HL-93 loads, and multi-story frames with BNBC wind and seismic loads.
D1ETABS Intro & Setup
D2Beam Modelling & Analysis
D3Beam Practice
D4Bridge Portal & AASHTO
D5Bridge Portal Continued
D7Multi-Story Building Frame
D8Wind & Seismic (BNBC)
D9Practice: Building Frame
D10Practice Continued
★BNBC Load Calculator
★ETABS Step Checklists
★Quick-Check Quizzes
Frequently Asked Questions
❓ Frequently Asked Questions (FAQ)
Why does concrete fail in tension? What’s the 10× rule? Visual answers to core concepts.
LIVE