- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | LI Yongle, HUANG Xu, ZHU Jin, ZHANG Mingjin. Thermal Effects and Anti-Crack Performance Optimization of Bridge Pylons Under Extreme Weather Conditions[J]. Journal of Southwest Jiaotong University, 2023, 58(5): 975-984, 1036. doi: 10.3969/j.issn.0258-2724.20210680
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In order to evaluate thermal effects on bridge pylons in extreme weather in Hengduan Mountain region of western China, a method was applied to a long span suspension bridge that the characteristics of the temperature field and temperature stress of the bridge pylon were analyzed, and two anti-crack strategies were investigated. First, a scheme was introduced to identify and simulate the extreme weather at the bridge based on measured data. And then the characteristics of the temperature field and the associated temperature stress of the pylon in simulated extreme weather were analyzed with the software ANSYS. Finally, two strategies were proposed to solve the issue of potential crack of the pylon under extreme weather condition, adding organic coatings or a layer of UHPC (ultra high-performance concrete) on the pylon surface. The results indicate that the pylon is at risk of cracking when the tensile stress at its surface reaches 2.19 MPa in strong cooling weather. And both strategies can effectively reduce the maximum tensile stress of the surface to a safe level. As for the strategy of adding the organic coatings, the white organic coating is more favorable; so is the layer of UHPC of 0.08 m. Compared with their budget and construction, adding white organic coating is recommended as the better anti-crack strategy for the bridge pylon in this study.
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