个人信息Personal Information
副教授
硕士生导师
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:水利工程系
学科:水工结构工程
办公地点:综合试验3号楼528-2
联系方式:QQ545704082
电子邮箱:zhang-yunliang@dlut.edu.cn
考虑垫层材料非线性的压力钢管内水压力传递系数
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发表时间:2014-01-01
发表刊物:水利学报
所属单位:建设工程学部
期号:11
页面范围:1381-1386
ISSN号:0559-9350
摘要:A thin yielding layer, which is installed between steel liners and surrounding concrete of buried penstocks or spiral cases in hydropower stations, can regulate quantitatively the ratio of internal water pres?sure allocated between the components. At present, the material nonlinearity of the yielding layer has not been considered in deriving and determining analytically the internal water pressure transmission coefficientλ. In this paper, according to the theory of multilayer cylinder and actual loading features of the yielding layer, the analytical formula for calculating λ was derived, where the material compression nonlinearity of the yielding layer and existence of gaps between the components were first considered. The formula shows that λ is influenced by the gap, applied water pressure, and the thickness, residual strain and stress-strain data at the loading stage of the yielding layer. An example shows that λ varies dramatically with the thickness of the yielding layer. The thicker the yielding layer becomes, the bigger λ is. In addi?tion,λ becomes smaller with the cycle number of loading and unloading for the yielding layer. When the cycle number exceeds a certain value,λ remains unchanged.
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