| --- |
| title: DBFT Pavement Strain Predictor |
| emoji: 🛣️ |
| colorFrom: green |
| colorTo: gray |
| sdk: gradio |
| sdk_version: 5.24.0 |
| app_file: app.py |
| pinned: false |
| license: mit |
| --- |
| |
| # DBFT — Pavement Strain Predictor |
|
|
| Predicts the two critical pavement strains **directly** from a Falling Weight |
| Deflectometer (FWD) test — no backcalculation step: |
|
|
| - **ε_t** — horizontal tensile strain at the bottom of the asphalt layer |
| (fatigue-cracking criterion) |
| - **ε_c** — vertical compressive strain at the top of the subgrade |
| (rutting criterion) |
|
|
| Model: **DBFT (Deflection-Basin Fusion Transformer)**, ~150k parameters, |
| trained with a combined surrogate + field loss (λ = 1.0) on an extended |
| layered-elastic surrogate (14,174 PyMastic/EVERSTRESS solutions) plus 7,651 |
| Thai DOH field measurements. Held-out-route field performance: |
| **R² = 0.96 (AC) / 0.88 (subgrade)**. |
|
|
| Every prediction includes a **local SHAP attribution** (KernelExplainer over |
| the 12 field-measurable inputs: 9 deflections D0–D1800 + 3 layer thicknesses) |
| showing how each input pushed the prediction away from the model baseline. |
|
|
| ## Inputs |
|
|
| | Input | Unit | Note | |
| |---|---|---| |
| | D0 … D1800 | μm | deflection basin, normalized to 707 kPa plate pressure | |
| | h_AC, h_Base, h_Subbase | mm | h_Subbase = 0 for structures without a subbase | |
|
|
| ## Run locally |
|
|
| ```bash |
| pip install -r requirements.txt gradio |
| python app.py |
| ``` |
|
|
