Structural behavior of a pre-stressed cable steel truss exposed to fire
Structural behavior of a pre-stressed cable steel truss exposed to fire
复制标题
预应力钢索桁架在火灾中的结构性能
DOI：
10.1108/jsfe-03-2017-0025
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发表时间：
2017-03
影响因子：
1
通讯作者：
Yunchun Xia
中科院分区：
文献类型：
--
作者：
Yunchun Xia
目的--本文旨在根据一个大型试验项目的结果，介绍在火灾条件下暴露于火中的预应力索钢桁架的性能研究结果。设计/方法/途径-本研究探讨预应力钢索之变形及应力变化，包括不同节点之挠度及位移，以及预应力钢索之耐火特性。比较了不同预应力、竖向荷载、拉索高度、桁架尺寸和最终温度下的火灾性能。结果--结果表明，纵向弦的应变远大于横向弦的应变，下部弦的应变明显大于上部弦的应变，纵向中心线附近的弦的应变也大于外侧的应变。横向弦。在升温过程中，位移和应变随荷载的变化由线性逐渐变为非线性，弦杆的屈服顺序也是跨中靠近纵向中心线的弦杆先屈服。独创性/价值-炉内温度和预应力钢索钢桁架的几个点的温度，以及上弦杆和底部钢索的变形、挠度和应力变化以及不同接头处的位移变化进行了测量，以实现这些目标，从而评估预应力钢索的变形特性和温度。
Purpose – This paper aims to present the results of a study on the behaviour of a pre-stressed cable steel.truss exposed to fire under fire conditions, basing on the results of a large programme of experimental tests..Design/methodology/approach – The research investigated the deformation and stress change on a.pre-stressed steel cable, including the deflection and displacements at different joints and fire behaviour of the.pre-stressed steel cable. In other words, the structural behaviours at different loaded pre-stress, the vertical.loading, steel cable height, truss dimension and the final temperature were compared in case of fire..Findings – The results showed that the strain of longitudinal chord was far larger than those of the.transverse chords, the strains of lower chords were significantly larger than those of the upper chords, strain.of the chord near the longitudinal centreline were also larger than those of the outside transverse chords..During heating, the displacement and strain gradually changed from linear to nonlinear with loading, and the.yielded chord had also in an order those chords which were at mid-span and near to the longitudinal centreline,.yielded at first..Originality/value – Temperatures in the furnace and at several points of the pre-stressed cable steel truss,.as well as deformations, deflections and the stress changes of upper chord and the bottom steel cable and the.change of displacement at different joint were measured to achieve those goals and, consequently, to assess the.deformation behaviours and temperature of the pre-stressed steel cable.
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影响因子：
4.1
作者：
C. Bailey
通讯作者：
C. Bailey
影响因子：
4.1
作者：
K. Al-Jabri;I. Burgess;T. Lennon;R. Plank
通讯作者：
K. Al-Jabri;I. Burgess;T. Lennon;R. Plank
DOI：
10.2495/hpsm040301
发表时间：
2004-05
期刊：
WIT Transactions on the Built Environment
影响因子：
--
作者：
Adeeb A. Rahman;R. Hawileh;M. Mahamid
通讯作者：
Adeeb A. Rahman;R. Hawileh;M. Mahamid
影响因子：
4.1
作者：
D. Nethercot;T. Li;B. Choo
通讯作者：
D. Nethercot;T. Li;B. Choo
DOI：
--
发表时间：
2007
期刊：
--
影响因子：
--
作者：
M. Sarraj;John Davison;I. Burgess
通讯作者：
M. Sarraj;John Davison;I. Burgess