两种常用的简单支梁桥的生命周期碳排放的比较研究
Fasheng Qian1, Yong Ding2, Xinlei Shi3
1Department of Civil Engineering, Ningbo University, Ningbo, 315211, China.
Scientific reports
|April 28, 2025
概括
由于减少材料使用和更好的耐用性,T束桥的生命周期碳排放 (LCCE) 比空心板桥低. 专注于生产和运营阶段为桥梁提供了最有效的碳减排策略.
科学领域:
- 土木工程 土木工程是指土木工程.
- 环境科学 环境科学
- 可持续建筑 可持续建筑
背景情况:
- 桥梁工程对建筑行业的碳足迹做出了重大贡献.
- 生命周期碳排放 (LCCE) 对于评估基础设施对环境的影响至关重要.
- 简单支梁桥,特别是空心板和T梁类型,被广泛使用.
研究的目的:
- 为了比较空洞板桥和T梁桥的LCCE.
- 为了建立公平比较的原则:高层结构的相同刚度和低层结构的相匹配负载效应.
- 确定影响简单支梁桥 LCCE 的关键因素.
主要方法:
- 根据相同的刚度和承载原理设计了6个桥梁 (2种类型,3个跨度).
- 开发了LCCE的计算模型,包括生产,施工,运营和拆除阶段.
- 确定每个阶段的碳排放因子,并计算设计桥梁的LCCE.
主要成果:
- 在同一个跨度上,T梁桥的LCCE比空洞板桥低8-10%.
- 生产阶段 (83-84%) 和运营阶段 (11-12.6%) 是LCCE的最重要贡献者.
- 使用回收钢 (100%) 和使用回收聚合物的混凝土可以大幅减少桥梁碳排放.
结论:
- 图形梁桥为空洞板桥提供了一个更可持续的替代方案.
- 在生产和运营阶段优先考虑减少碳排放对于整体桥梁可持续性至关重要.
- 材料选择,特别是回收材料选择和桥梁跨度优化是减少LCCE的关键策略.
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