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中文摘要：
由于渤海近岸流冰的运动速度和尺寸较小,具有的动能也较小,所以其对结构物的作用形式主要是撞击,而不是挤压。为了得到合理的近岸码头排桩设计冰力,利用实验室模拟水流带动一定质量的模型冰块以一定速度撞击码头排桩模型,获得作用于一榀码头排桩上单桩或同时作用于群桩上的试验冰力。系列试验结果表明冰力的上限值随流冰压缩强度和动能增加而增加,并趋向一定值。经过数学统计,得到作用在单桩上冰力上限值同流冰动能和压缩强度之间的试验关系。该关系将流冰的尺寸、厚度、密度、运动速度、压缩强度同单桩上冰力上限值结合起来,作为流冰对单桩设计冰撞击力的基础,具有普适性意义。此外,还结合渤海具体码头工程,用该试验成果评估作用在一榀码头排架单桩上冰力和整体排架结构总冰力。
英文摘要：
The coastal ice floes in Bohai have smaller kinetic energy,and there are only drive impact forces on structures because they have slow speed and small size.In order to obtain the suitable designed ice forces on pile structures of wharfs in Bohai coastal area,a series of physical simulation tests were performed by using ice floes impact on the piles of a wharf model with a certain floe speed in a water flume,and the impact forces on a single pile or piles simultaneously were obtained.The experimental results indicate that the upper limit values of the impact forces increase with the increase of compressive strength and kinetic energy of the floes,and tend to a certain force.Based on fitting approaching,the statistical relation among the upper impact forces acted on the single pile,the floe kinetic energy and its peak compressive strength are obtained.The statistical relation combining the floe size,thickness,density,speed,peak compressive strength with the upper impact forces together can consider as the basement of a design ice force on a single pile in coastal ice engineering.In addition,the impact force on a pile and the composition of forces on piles in an element of a wharf structure is evaluated following the test results based on the ice conditions in the area of a designed wharf construction in Bohai Sea.
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