| 孙 强,钱军龙,田 伟.预应力钢梁高温环境下的力学特征有限元分析[J].安徽建筑大学学报,2016,24(2):1-5 |
| 预应力钢梁高温环境下的力学特征有限元分析 |
| Finite Element Analysis of Mechanics Properties of Prestressed Steel Beam under High Temperature(Fire) Condition |
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| DOI：10.11921/j.issn.2095-8382.20160201 |
| 中文关键词: 预应力钢梁，高温(火灾)，预应力损失，变形特性，温度，钢索 |
| 英文关键词: prestressed steel beam, high temperature (fire), loss of prestress, mechanical properties, temperature,
wire rope
prestressed steel beam, high temperature (fire), loss of prestress, mechanical properties, temperature,
wire rope |
| 基金项目:国家重点基础研究发展计划项目（2012CB719703），安徽高校省级自然科学研究重大项目（KJ2014ZD06），安徽省自然科学基金（1408085QE96） |
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| 中文摘要: |
| 采用有限元方法研究预应力钢梁在受火条件下，一定时间段内构件的温度分布状况及其变化，在热分析的前提下，进行构件的热力效应分析。并将相应工况的力学特性研究与理论计算结果进行对比分析，从而进一步探索预应力钢梁在火灾（高温）条件下损伤机理。研究表明：温度高低、荷载形式、梁端约束、预应力损失、拉索布置高度等因素对钢梁的力学特性产生较大影响。所得结论可为预应力钢结构抗火设计提供参考。 |
| 英文摘要: |
| By adopting FEM, this paper analyzes the temperature distribution and the change of prestressed steel beam under fire during a certain period. Based on thermal analysis, the thermal effect of members was analyzed. Then, the corresponding mechanic features have been compared with the theoretical results to further exploring the damage mechanism of prestressed steel beam under high temperature condition. The result shows that factors including temperature level, load form, the restriction of the beam end, prestress loss, height arrangement of the lasso, etc have great effects on the mechanical properties of the steel beam. The conclusion can provide reference for the fire-resistance design of prestressed steel structure. |
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