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木栈道冻融变形物理模拟试验研究

Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2014-01-28

Journal: 低温建筑技术

Volume: 36

Issue: 1

Page Number: 38-39,49

ISSN: 1001-6864

Key Words: 冰;膨胀力;木栈道;冻融

Abstract: 大连冬季最低气温可以达到-18℃,各类海岸建筑物如木栈道、栈桥、堤岸等会因冰冻产生一些工程问题.大连近海并不是全部封冻,海浪可以越过东港商务景观区护岸胸墙,并且这部分海水不能很好地排出,在低气温时结冰.预测防波堤内侧木栈道局部结冰厚度可能达20cm,木栈道因结冰向上膨胀力的作用可能会变形破坏.为探究冰的膨胀变形对木栈道结构的影响情况,对木栈道试件进行了冻胀试验、模拟拉拔破坏承载力试验和反复冻融试验.试验结果表明:只发生一次冻胀,试件无明显变形;但在反复冻融中,随着冻融次数的增加,试件的变形逐渐增大,并在第三冻融周期失稳破坏.

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