| 考虑重力坝纵缝结合程度的非线性有限元数值模拟 |
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| 引用本文： | 王刚,马震岳,张运良,徐小梅.考虑重力坝纵缝结合程度的非线性有限元数值模拟[J].水力发电学报,2009,28(2). |
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| 作者姓名： | 王刚 马震岳 张运良 徐小梅 |
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| 作者单位： | 大连理工大学土木水利学院,辽宁,大连,116023
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| 摘 要： | 为了对老化混凝土重力坝纵缝进行较为合理的模拟,在分析接触面法向和切向非线性受力特性的基础上,详细给出了具有厚度的接触面单元的法向和切向本构关系模型,特别是针对工程中实际问题提出了适合描述纵缝结合程度的法向关系新模型,编制了有限元计算程序.该程序对接触面非线性计算采用增量迭代法,实现了接缝单元强度校核时的结点不平衡力计算与单元法向嵌入控制时的嵌入调整同步进行.本文利用典型算例验证了该程序的合理性、精确性与普适性.最后,通过对一实际老混凝土重力坝纵缝的模拟,明确纵缝各力学参数对坝体变形和应力的影响规律,并为混凝土重力坝类似接缝问题的分析研究提供新的思路和实用数值方法.
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| 关 键 词： | 水工结构 纵缝结合作用 非线性有限元 重力坝 增量迭代法 具有厚度的接触面单元 |
Simulation of connecting degree of longitudinal joints in gravity dams by nonlinear finite element method |
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| WANG Gang,MA Zhenyue,ZHANG Yunliang,XU Xiaomei.Simulation of connecting degree of longitudinal joints in gravity dams by nonlinear finite element method[J].Journal of Hydroelectric Engineering,2009,28(2). |
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| Authors: | WANG Gang MA Zhenyue ZHANG Yunliang XU Xiaomei |
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| Affiliation: | College of Civil and Hydraulic Engineering;Dalian Univ.of Technology;Dalian;Liaoning\ 116023 |
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| Abstract: | Based on analysis of the normal and shear characteristics of the longitudinal joints in aging concrete gravity dams,the constitutive model of longitudinal joint is provided,especially a new normal constitutive function is developed reasonably for elements with thickness simulating such joints,and then all the ideas are written in the nonlinear finite element code including increment iteration method.The non-balance force at each node and the normal penetration of the two interfaces of each joint element are... |
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| Keywords: | hydraulic structure connecting characteristic of longitudinal joints nonlinear finite element method gravity dam increment iteration method joint element with thickness |
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