| 摘要: |
| 基于冻融与疲劳耦合作用下混凝土弹性模量衰减模型、冻融损伤的混凝土疲劳本构模型以及钢筋的疲劳本构方程，通过ANSYS综合各模型的材料参数，模拟预应力混凝土受弯构件在冻融与疲劳交替作用下的疲劳性能，并与试验结果进行对比.结果表明：数值模拟的预应力混凝土构件弯曲挠度和上边缘的应变与试验结果吻合较好，所得结果可为实际工程中冻融环境下预应力混凝土疲劳性能的数值模拟提供有效方法. |
| 关键词: 混凝土构件 疲劳性能 数值模拟 冻融循环 剩余强度 |
| DOI：103969/j.issn.1007 9629201705013 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（50878098）；住建部科技计划项目（2013 k4 26） |
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| Numerical Simulation of Prestressed Concrete Components Subjected to Fatigue Loading and Freezing Thawing Cycles |
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ZHANG Yiduo, WANG Xin, SHI Kang
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School of Civil Engineering and Architectural, Jiangsu University of Science and Technology, Zhenjiang 212003, China
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| Abstract: |
| Based on elastic modulus of concrete considering coupling effects of fatigue loading and freezing thawing cycles(FTCs), the fatigue constitutive model of concrete which subjected to freeze thaw damage and the fatigue constitutive equation of steel bar, the material parameters of each model were set up properly in ANSYS. In order to simulate the fatigue behavior of prestressed concrete bending components under the alternative action of FTCs and fatigue loading,these parameters were modified correspondingly. By comparison, the results show that the numerical simulation of the bending deflection and the upper edge strain is in good agreement with the test, which can provide an effective method for the numerical simulation of the fatigue performance of the prestressed concrete components under FTCs in the practical projects. |
| Key words: concrete component fatigue performance numerical simulation freezing thawing cycle(FTC) residual strength |
