Experimental and numerical investigation of post-tensioned concrete flat slabs in fire

被引：6

作者：

Wei, Ya ^{[1
]}

Au, Francis T. K. ^{[1
]}

Li, Jing ^{[2
]}

Tsang, Neil C. M. ^{[3
]}

机构：

[1] Univ Hong Kong, Dept Civil Engn, Hong Kong, Hong Kong, Peoples R China

[2] South China Univ Technol, Dept Civil Engn, Guangzhou, Guangdong, Peoples R China

[3] Coventry Univ, Dept Civil Engn Architecture & Bldg, Coventry, W Midlands, England

来源：

JOURNAL OF STRUCTURAL FIRE ENGINEERING | 2016年 / 7卷 / 01期

关键词：

Fire resistance; Concrete spalling; Fire; High-strength self-compacting concrete; Post-tensioned flat slab; Crack patterns;

D O I：

10.1108/JSFE-03-2016-001

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

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.

引用

页码：2 / 18

页数：17

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