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摘要:
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通过大圆筒码头结构在不同地基埋置状况下不同径高比抗震性能模型试验 ,对大圆筒结构自振频率、振型、动力放大系数等动力特性进行了分析比较。主要结果表明 :大圆筒结构适用于有后方填土的软弱地基 ,剪切型结构优于弯曲型结构 ;径高比对振型影响较大 ,且随着径高比的减小 ,结构自振频率有所降低 ,动力放大系数有所增加。
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Dynamic characteristics of large cylindrical structure,such as frequency,mode of vibration and dynamic enlargement factor are analyzed in this paper,by model tests in varying ratios of diameter to height.It is shown that large cylindrical structure is applicable to weak foundations with back fill,and that shear structure is superior to flexural structure.The frequency of structure is decreased along with reducing ratio of diameter to height,and dynamic enlargement factor is increased,furthermore,the influence of mode of vibration is obvious.
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作者简介:
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参考文献:
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[1] 中华人民共和国行业标准 .水运工程抗震设计规范JTJ2 2 5— 98[S].北京 :人民交通出版社 ,1998.
[2 ] 宫维圣 .码头和船闸建筑物的抗震 [M].北京 :人民交通出版社 ,1993.
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