📋 Case Study

Precast Bridge Girder Retrofit in Ohio

Adding capacity without increasing dead load or disrupting traffic

🏗️ Project Overview

Strengthening 42-year-old AASHTO Type IV girders carrying I-71 traffic

🎯 Challenge

Adding capacity without increasing dead load or disrupting traffic

🔧 Design Approach

Externally bonded CFRP laminates + near-surface mounted (NSM) stainless steel bars per ACI 440.2R and fib Bulletin 14

📐 Design Diagram

AI-generated project design illustration

📐 Key Calculations

CFRP Strain Limit

ε_f ≤ 0.004 (fib)

Result: 0.0037