| 温度和荷载共同作用下钢管混凝土短柱的性能分析 |
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| 摘 要： | 采用有限元模型研究温度与荷载共同作用下的钢管混凝土短柱的荷载-变形关系。该模型用来模拟一系列各种温度和力学加载条件下的钢管混凝土短柱试验,包括高温测试、常温下构件残余强度测试,以及无初始荷载的ISO-834标准温度下的构件测试。预测结果以及试验结果的对比表明:模型可以准确预测构件的荷载-变形关系。然后采用该有限元模型分析在具有初始荷载、加热和制冷条件下完全加载过程中的钢管混凝土短柱的性能,以观察构件横截面的应力分布和各个加载阶段的应力发展情况。所有构件在制冷过程之后都加载至极限强度,利用一系列参数对其残余应力进行了分析。结果发现:在温度和荷载共同作用下的构件极限强度,要比只有温度作用而无初始荷载的构件极限强度略低,但是在极限强度时,前者的最大应变显著增加。
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| 关 键 词： | 钢管混凝土 组合柱 中空截面 有限元模型 充分加温 残余强度 |
Concrete Filled Steel Tube Stub Columns Under Combined Temperature and Loading |
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| Tian-Yi Song,Lin-Hai Han , Hong-Xia Yu. Concrete Filled Steel Tube Stub Columns Under Combined Temperature and Loading[J]. Steel Construction, 2010, 0(2) |
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| Authors: | Tian-Yi Song Lin-Hai Han Hong-Xia Yu |
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| Abstract: | A finite element analysis(FEA) model was developed to predict the load versus deformation relationships of concrete filled steel tube(CFST) stub columns subjected to a combination of temperature and axial compression.This model was used to simulate a set of CFST stub column experiments under various thermal and mechanical loading conditions,including tests at high temperature,tests on the residual strength of specimens subjected to uniform heating,and tests on specimens exposed to the ISO-834 standard fire ... |
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| Keywords: | Concrete-filled steel tube Composite columns Hollow sections FEA model Full range fire Residual strength |
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