ACI 423.10R-16 PDF下载

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ACI 423.10R-16《后张法预应力混凝土构件防火设计指南》PDF下载
该指南是美国混凝土协会(ACI)针对后张法预应力混凝土楼板、梁、柱在火灾作用下的耐火性能与烧穿抗力专门编制的技术报告。核心亮点包括:
1、提出“烧穿抗力(DHP)”概念,即构件在ISO 834标准升温+线性冷却全过程(2–20 °C/min)中维持承载力的最短持续加热时间,比传统耐火等级R更贴近真实火灾;
2、给出简支板、连续梁、框架柱等不同构件的最小混凝土保护层厚度与最小截面厚度表格,可直接用于性能化防火设计,实现从“耐火等级”到“烧穿抗力”的快速转换;
3、提供基于钢筋温度退化的简化手算法与高级热-力耦合有限元流程,兼顾方案阶段快速估算与施工图阶段精细验算;
4、明确无粘结预应力钢绞线在火灾下的极限温度限值与锚固区附加防火措施,解决后张板在停车场、购物中心等大空间结构中常见的防火厚度不足问题 。
ACI 423.10R-16已被2022版IBC、ASCE 7-22引用,是海外EPC、审图、保险评估及Google Scholar高性能混凝土抗火研究的高频参考文献。

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