CJJ/T 301-2020 in English
VALIDDesign load standard for elevated structure of Urban Rail Transit
- Issued on:2020-04-09
- Implemented on:2020-10-01
- File Format:PDF
- Delivery:Via email within 5 business days
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本标准适用于钢轮钢轨制式和跨座式单轨制式，最高运行速度不超过120km/h的城市轨道交通高架结构的设计。
Introduction
Analysis of the core content of the standard
| Load type | Calculation requirements | Combination coefficient |
|---|---|---|
| Permanent load | Material weight according to TB 10002 | 1.2-1.35 |
| Train live load | Consider dynamic coefficient (starting from 1.3) | 0.7 |
| Special load | Breaking rail force/derailment load | 0.6 |
Key Technical Points
100-year life design: The main structure is designed for a service life of 100 years, and the influence of concrete shrinkage and creep refers to the JTG 3362 specification.
Straddle-type monorail Dynamic coefficient formula: 1+20/(50+L), where L is the span of the bridge (m).
Load combination principles
- Main combination: basic combination of dead load + live load
- Additional combination: main force + temperature force/braking force
- Special combination: main force + earthquake/impact force
Implementation suggestions
- Curved bridges must be verified for conditions without centrifugal force
- The braking force of double-track bridges is taken as 15% of the live load
- Derailment load range: centerline of track ±2.1m
Sample only — not a preview of CJJ/T 301-2020
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