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| 京新高速钢板组合梁桥工字钢梁温度效应研究 | |
| 引用本文： | 李启成. 京新高速钢板组合梁桥工字钢梁温度效应研究[J]. 铁道建筑技术, 2021, 0(2): 33-37 |
| 作者姓名： | 李启成 |
| 作者单位： | 中铁二十一局集团第一工程有限公司 |
| 基金项目： | 中铁二十一局集团有限公司科技研究开发计划项目(19B-1)。 |
| 摘 要： | 温度效应是影响桥梁内力、线形乃至施工安全的重要因素。本文以盆克特2号钢板组合梁桥为例,以板单化规律进行研究;据此规律,重点分析支座与跨中两个关键截面温度梯度作用下截面正应力随梁高的变化规律;按照中、英、美三国规范分别规定的温度梯度作用建立模型,对工字钢梁跨中截面应力分布特征进行对比分析。 |
| 关 键 词： | 钢板组合梁桥 温度梯度 温度效应 应力分析 |
Research on Temperature Effect of I-beam of Steel Plate Composite Beam Bridge in Beijing-Xinjiang Expressway |
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| LI Qicheng. Research on Temperature Effect of I-beam of Steel Plate Composite Beam Bridge in Beijing-Xinjiang Expressway[J]. Railway Construction Technology, 2021, 0(2): 33-37 | |
| Authors: | LI Qicheng |
| Affiliation: | (China Railway 21st Bureau Group 1st Engineering Co.Ltd.,Urumqi Xinjiang 830026,China) |
| Abstract: | The temperature effect is an important factor affecting the internal force,alignment and even construction safety of bridges.In this paper,taking Penkete No.2 steel plate composite beam bridge as an example,the plate element is used to simulate the I-beam,and the finite element calculation model is established by using MIDAS Civil to study the change rule of cross-section normal stress with span at different beam height positions under the action of temperature gradient.According to this law,the change law of cross-section normal stress with beam height under the effect of cross-section temperature gradient of support and middle is analyzed emphatically.The stress distribution in the midspan of I-beam is compared and analyzed by establishing the model of temperature gradient effect specified in the codes of Chinese,British and American. |
| Keywords: | steel plate composite beam bridge temperature gradient temperature effect stress analysis |
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