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首页> 外文期刊>Journal of structural fire engineering >Experimental and numerical investigation of post-tensioned concrete flat slabs in fire
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Experimental and numerical investigation of post-tensioned concrete flat slabs in fire

机译：后张火混凝土平板的试验与数值研究

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Purpose - This paper aims to understand the structural fire performance of two-way post-tensioned flat slabs, particularly their deformations and load-carrying mechanisms in fire, and to explore the behaviour of post-tensioned high-strength self-compacting concrete flat slabs with unbonded tendons in fire. Design/methodology/approach - Four tests of post-tensioned high-strength self-compacting concrete flat slabs were conducted under fire conditions. Numerical modelling using the commercial package ABAQUS was conducted to help interpret the test results. Findings - Two of the specimens with lower moisture contents demonstrated excellent fire resistance performance, while the others with slightly higher moisture contents experienced severe concrete spalling. Originality/value - The test results were discussed in respect of thermal profiles, deflections, crack patterns and concrete spalling. The performance of post-tensioned high-strength self-compacting concrete flat slabs with unbonded tendons under fire conditions was better understood.
机译：目的-本文旨在了解双向后张扁平板的结构防火性能，特别是其在火灾中的变形和承载机理，并探讨后张高强度自密实混凝土平板的性能。火中没有粘结的腱。设计/方法/方法-在火灾条件下进行了四次后张高强度自密实混凝土平板的测试。使用商业软件包ABAQUS进行了数值建模，以帮助解释测试结果。发现-水分含量较低的两个样品表现出优异的耐火性能，而水分含量稍高的其他样品则经历了严重的混凝土剥落。原创性/价值-讨论了有关热剖面，挠度，裂缝模式和混凝土剥落的测试结果。更好地了解了在火灾条件下具有无粘结筋的后张高强自密实混凝土平板的性能。

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