| 钢筋混凝土剪力墙受火性能非线性分析 |
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| 引用本文： | 刘桂荣,宋玉普,曲福来.钢筋混凝土剪力墙受火性能非线性分析[J].计算力学学报,2011,28(4):635-640. |
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| 作者姓名： | 刘桂荣 宋玉普 曲福来 |
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| 作者单位： | 大连理工大学海岸和近海工程国家重点实验室,大连,116024 |
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| 基金项目： | 高等学校博士学科点专项科研基金(200801410005);华北水利水电学院高层次人才科研启动(201070)资助项目. |
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| 摘 要： | 为了研究钢筋混凝土剪力墙的抗火性能,本文基于纤维元模型,提出了一种非线性分析方法。该方法无需计算截面的弯矩-曲率曲线族,计算过程中采用了高温下耦合的混凝土本构关系,其中考虑了混凝土高温热膨胀应变、瞬态热应变和徐变。编制了相应的非线性计算分析程序,程序考虑了轴力二阶效应的影响,计算得到了剪力墙跨中平面外挠度以及火灾下其跨...
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| 关 键 词： | 混凝土 剪力墙 火灾反应 耦合本构 非线性分析 |
| 收稿时间： | 2009/10/9 0:00:00 |
| 修稿时间： | 2009/12/4 0:00:00 |
Non-linear analysis for predicting fire performance of reinforced concrete shear walls |
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| LIU Gui-rong,SONG Yu-pu and QU Fu-lai.Non-linear analysis for predicting fire performance of reinforced concrete shear walls[J].Chinese Journal of Computational Mechanics,2011,28(4):635-640. |
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| Authors: | LIU Gui-rong SONG Yu-pu and QU Fu-lai |
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| Institution: | State Key Laboratory of Costal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;School of Civil Engineering and Communication, North China University of Water Conservancy and Electric Power, Zhengzhou 450011, China;State Key Laboratory of Costal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;School of Civil Engineering and Communication, North China University of Water Conservancy and Electric Power, Zhengzhou 450011, China |
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| Abstract: | A nonlinear analysis method is presented based on the fiber element model to simulate the response of reinforced concrete (RC) shear walls under fire conditions. This method does not require computations of moment-curvature curve group. A coupling constitutive relation of concrete at elevated temperature is adopted in this analysis, in which the effects of concrete thermal, creep and transient strain are taken into account. Then a corresponding computer program considering the second-order effect of axial forces is developed. The mid-span deflection of the (RC) shear wall as well as the strain and stress distribution of the mid-span section is calculated by this program. Fire test of RC shear walls has been carried out to verify the proposed numerical model. And its validity is established by comparing the calculated deflections with the measured values. In addition, the appearance of cracks during the fire test is reasonably explained by the predictions of the strain and stress on the cross section. |
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| Keywords: | concrete shear wall fire behavior coupling constitutive relation nonlinear analysis |
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