【作者】 黄焱； 史庆增； 宋安；

【Author】 HUANG Yan;SHI Qingzeng;SONG An Tianjin University

【机构】 天津大学；

【摘要】 在寒冷地区,各类水工建筑物均会受到冰荷载的作用,而冰的温度膨胀力是其中一种对结构产生重要影响的荷载。例如,坐落于寒冷地区的水库建筑、海中固定式结构、防波堤和护岸等。这些结构形成了冰的约束边界,当外界环境温度(主要是气温)发生变化时,冰的温度场也发生变化,从而引起冰的应变,产生温度应力,并对结构产生温度膨胀力。冰的温度膨胀力受多种因素的影响,包括约束边界的形状、约束体的刚度、冰层的相对厚度、升温速率、冰的应变率等。冰的温度膨胀力已引起较为广泛的关注,本文对目前国际上对冰的温度膨胀力具有代表性的几种估算方法进行了介绍和简单的评价,为实际工程的设计提供了一些参考依据。更多还原

【Abstract】 In cold regions, water power engineering structures will be impacted by ice load, and the thermalexpanding force of ice plays important role in it. For instance, reservoirs, fixed marine structures,breakwaters and retaining walls, which seated in cold regions. The structures form the confining boundariesof ice. When the environmental temperature changes, the thermal field of ice also changes, and the strain ofice, which induces the thermal stress of ice and the corresponding thermal expanding force of ice onstructures, is produced. There are many factors, including the confining boundary shape, the confining bodystiffness, the relative thickness of ice, the increase rate of temperature and the strain rate of ice, have effectson the thermal expanding force of ice. The problem has been widely concerned. A few representativeestimations are introduced and simply evaluated in this paper, and some references, on which practicalengineering designs can be based, are given in this paper.更多还原