Holistic Robustness of Post-tensioned Floor Slabs under Fire Attack

后张法楼板由于具有净跨容易实现、施工深度小、钢筋用量少等优点，在英国越来越受欢迎。虽然后张楼板在美国、澳大利亚和远东地区已成功使用了几十年，在正常的日常条件下没有任何问题的证据，但它们在火灾下的性能，无论是通过小规模测试还是从真实的火灾中获得的经验，都是未知的。目前，设计师采用简单过时的规定规则，这些规则是为其他形式的建筑开发的，与后张楼板的创新力学没有相似之处。本研究项目将首次通过实验研究和理论建模，研究后张楼板在火灾中的行为。开发的理论模型将最终允许简单的设计规则，以确保建筑物的安全和强大的建设，包括后张楼板。

Due to the advantages of readily achievable clear spans, small construction depth and minimum steel reinforcement, the use of post-tensioned floor slabs in the UK is becoming more popular. Although post-tensioned floor slabs have been used successfully in the United States, Australia and the Far East for a number of decades, without any evidence of problems under normal everyday conditions, their performance under fire, either through small-scale testing or experience from real fires, is unknown. Currently, designers adopt simple antiquated prescriptive rules that were developed for other forms of construction that bear no resemblance to the innovative mechanics of post-tensioned floor slabs. This research project will, for the first time, investigate the behaviour of post-tensioned floor slabs in fire, through experimental investigation coupled with theoretical modelling. The developed theoretical model will ultimately allow simple design rules to be developed which will ensure the safe and robust construction of buildings incorporating post-tensioned floor slabs.