首页|Study on the deformation and cracking characteristics of bridge-crossing reservoir ice sheet in cold regions
Study on the deformation and cracking characteristics of bridge-crossing reservoir ice sheet in cold regions
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
Elsevier
The cracking of reservoir ice sheets in cold regions is a common natural phenomenon. As the ice cracks develop and the ice grows, the ice sheet will deform greatly, which seriously threatens the safety of the bridge structure. In this paper, the field observation of ice deformation was carried out with the ice sheet of reservoirs in cold regions as the research object, and the deformation law of the ice sheet was studied. Meanwhile, a calculation method for simulating ice cracks was proposed, and the distribution characteristics and cracking process of ice cracks were investigated in combination with the field crack observation results. The main findings of the study are as follows: When the temperature increased, the ice sheet moved in a pattern of expanding from the middle of the reservoir towards the shores. Using the steel trestle bridge as a dividing line, the ice sheet moved to upstream and downstream of the reservoir from the steel trestle bridge location. As temperatures decreased, the ice sheet moved from the shores towards the middle of the reservoir. The ice also moved from the upstream and downstream of the reservoir towards the steel trestle bridge. The study of the generation and extension direction of ice sheet cracks found that the bumps of the shores and the corners of the piers were prone to form cracks. The cracks would extend towards the higher stresses, and the cracks would tend to be connected when the piers and the bumps of the shores were closer. There were four main crack patterns in the reservoir, among which the crack pattern starting from the shore bump and running through the whole ice sheet was prone to produce serious thrust on the piers. The results of the study show that bridges crossing reservoirs are inevitably affected by ice sheet cracking in winter. Therefore, the location selection of new bridges needs to consider the influence of the position of ice cracking and the extension range of cracks to eliminate the safety hazards arising from ice cracking.
Cold regionReservoirIce sheetBridge pierCrackPLASTIC-DAMAGE MODEL
Qiu, Wenliang、Li, Kuan、Zhao, Xin
展开 >
Dalian University of Technology Faculty of Infrastructure Engineering
NETL
NSTL
Elsevier
