Effect of temperature difference load of 32 m simply supported box beam bridge on track vertical irregularity

• Published in: Journal of Modern Transportation Vol. 23; no. 4; pp. 262 - 271
• Main Authors: Xie, Kaize, Xing, Jun, Wang, Li, Tian, Chunxiang, Chen, Rong, Wang, Ping
• Format: Journal Article Book Review
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.12.2015; Springer Nature B.V; MOE Key Laboratory of High-Speed Railway Engineering,Southwest Jiaotong University, Chengdu 610031, China%China Railway Eryuan Engineering Group Co.Ltd, Chengdu 610031, China
• Subjects: Automotive Engineering; Beams (radiation); Box beams; Bridges (structures); Engineering; Foundations; Geoengineering; Hydraulics; Irregularities; Mathematical models; Regional/Spatial Science; Temperature gradient; Tracking; Transportation; 温度变化; 温度差; 温度曲线; 竖向; 简支梁桥; 箱梁桥; 轨道; 高低不平顺; Simply supported beam bridge; Beam height; Vertical irregularity; Temperature gradient
• ISSN: 2095-087X; 2662-4745; 2196-0577; 2662-4753
• DOI: 10.1007/s40534-015-0090-2

In order to study the effect of temperature difference load （TDL） along the vertical direction of a simply supported beam bridge section on the vertical irregularity, a rail-bridge-piers calculation model was established. Taking 32 m simply supported box beam bridge which is widely used in the construction of pas- senger dedicated line in China as an example, influences of the temperature variation between the bottom and top of the bridge, temperature curve index, type of temperature gradient, and beam height on track vertical irregularity were analyzed with the model. The results show that TDL has more effects on long wave track irregularity than on short one, and the wavelength mainly affected is approxi- mately equal to the beam span. The amplitude of irregu- larity caused by TDL is largely affected by the temperature variation, temperature curve index, and type of temperature gradient, so it is necessary to monitor the temperaturedistribution of bridges in different regions to provide accurate calculation parameters. In order to avoid the irregularity exceeding the limit values, the height of 32, 48, and 64 m simply supported box beam bridges must not be less than 2.15, 3.2, and 4.05 m, respectively.