| 无黏结预应力混凝土连续板火灾后的试验研究 |
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| 引用本文： | 高立堂,李晓东,陈礼刚,袁爱民.无黏结预应力混凝土连续板火灾后的试验研究[J].混凝土,2008(2):25-27,53. |
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| 作者姓名： | 高立堂 李晓东 陈礼刚 袁爱民 |
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| 作者单位： | 青岛理工大学,土木工程学院,山东,青岛,266033 |
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| 基金项目： | 国家自然科学基金
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国家自然科学基金
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国家重点基础研究发展计划(973计划) |
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| 摘 要： | 对9块12.6m×1.5 m后张无黏结预应力混凝土三跨连续板在火灾后性能进行了检测.试验首先按照ISO834标准曲线升温,到一定时间后采用自然冷却方式进行降温,并维持2.0 kN/m2的使用荷载不变.得出了板的变形及支反力、预应力变化情况,从而得出了灾后内力重分布的规律.裂缝基本没有新的发展,其宽度有所减小.为今后无黏结预应力混凝土结构的灾后行为研究提供依据.
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| 关 键 词： | 火灾 连续板 温度梯度 预应力 |
| 文章编号： | 1002-3550（2008）02-0025-04 |
| 收稿时间： | 2007-10-21 |
| 修稿时间： | 2007年10月21 |
Experimental Investigation of the behaviors of unbonded prestressed concrete continuous slabs after fire |
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| GAO Li-tang,LI Xiao-dong,CHENU Li-gang,YUAN Ai-min.Experimental Investigation of the behaviors of unbonded prestressed concrete continuous slabs after fire[J].Concrete,2008(2):25-27,53. |
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| Authors: | GAO Li-tang LI Xiao-dong CHENU Li-gang YUAN Ai-min |
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| Abstract: | The fire behaviors of 9 unbonded prestressed concrete continuous slabs with three spans of 12.6 m length and 1.5 m width were detected,after exposed to ISO834 standardized heating regime and 2.0 kN/m2 load.From the test results,the regularities of deformations,reactions and prestresses are presented.Regulations of internal force redistribution are given.Distributions of cracks of spans after fire have no increasing,and the cracks widths decrease.Conclusions of this study provide a basis for further research to explore fire behaviors of prestressed concrete structures with unbonded tendon. |
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| Keywords: | fire continuous slab temperature field prestress |
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