|
|
|
| Numerical Simulation and Test Analysis of Three - dimensional Solar Temperature Field of Hollow Tall - piers with Rounded Rectangular Cross Section |
| DAI Gong - lisin1，TANG Yu1，LIU Yong2，SU Hai - ting1 |
| (1. Central South University，Changslia，Hunan 410075，China; 2. Hunan Provincial Communications Planning，Survey ； Design Institute，Changslia，Hunan 410008，China) |
|
|
|
|
Abstract Abstract ： Research purposes ： Thehollowtall - piers with rounded rectangular cross section of high - speed railways
have temperature gradient under the influence of solar radiation. When the temperature gradient and the height of pier
exceed the limit，it will influence the safety and comfort of high - speed railways in operation because of t!ie temperature
stress and displacement at piers. To determine the changing law of the temperature field and deformations for tall -
piers，the three - dimensional finite element model of tall - piers was constructed， and field test of tall - piers
temperature field was completed. Taking 68 m tall - piers as an example，the characteristic of tiie temperature gradients
in the longitudinal and transverse bridge directions and the deformation effect under the solar radiation was investigated.
Research conclusions:(1) The temperatures along the direction of wall thickness are in negative exponential function distribution，the influence depth of temperature is about 0. 60 m. (2) The temperatures on the vertical surface of the tall - piers accorded with function distribution. (3) The maximum displacements of a tall - pier at the pier top result from the temperature gradients occur at 18 ：00. It is hopeful that the findings from this study provide the temperature field of 18 ：00 as the control loads to calculation the deformation of a bridge. (4) The
internal and external surface of tall - piers exist tensile stress ； it is hopeful to remind the designer of enhancing the rebar
of tall - piers to ensure crack resistance and safety. (5 ) The research results can provide a reference for design and
construction of tall - piers.
|
|
Received: 22 June 2016
|
|
|
|
| Cite this article: |
|
DAI Gong - lisin1,TANG Yu1,LIU Yong2, et al. Numerical Simulation and Test Analysis of Three - dimensional Solar Temperature Field of Hollow Tall - piers with Rounded Rectangular Cross Section[J]. Journal of Railway Engineering Society, 2016, 33(11): 57-62.
|
|
|
|
| URL: |
| https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2016/V33/I11/57 |
|
|
|
2016, Vol. 33 
