摘要
对SP预应力空心板高温下和高温后的性能进行了试验研究,受热温度分别为200,400和600℃.第1组板(板B1,B3,B5)经历相应时间的升温及恒温阶段后,进行高温下加载;第2组板(板B2,B4,B6)经历相应时间的升温、恒温及冷却阶段后,进行高温后加载.结果表明:SP板在升温恒温过程中截面内存在非线性的温度场有可能导致板件端部发生开裂,高温后冷却SP板出现了较大的反拱现象,反拱值B6为4.1 mm,B4为3.2 mm,B2为1.6 mm.SP板高温下加载比高温后加载的挠度增长速率快,但均表现出良好的延性破坏形式.
The performance of SP pres was studied experimentally. The test group of slabs （B1, B3 and B5） was 1 temperature. Another group （B2, B4 tressed hollow slabs und temperatures oaded under and B6） was were 200, temper er （and after） high 400 and 600 ℃ sep ature after heating temperature arately. One to a loaded after heating to temperature, them at constant temperature and then naturally cooling to ambient. T non-linear temperature field in an SP section should cause cracks at the he results show constant holding that the ends of the slabs as temperature increases to a constant elevated value. A reversed arch appeared after the inverted arch values of slabs B6, B4 and B2 were 4.1, 3.2 and 1.6 mm. The rate of the slabs loaded under high temperature increased more quickly than of the after high temperature. All slabs displayed good ductile fracture form. cooling the and deformation slabs loaded
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2008年第5期608-611,共4页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(59978008)
关键词
高温
预应力空心板
承载能力
变形
high temperature
pre-stressed hollow slab
bearing capacity
deformation
