周辉,高阳,张传庆,向天兵.考虑围岩衬砌相互作用的钢筋混凝土衬砌数值模拟[J].水利学报,2016,47(6):763-771 |
考虑围岩衬砌相互作用的钢筋混凝土衬砌数值模拟 |
Numerical simulation of reinforced concrete lining considering the interaction with thesurrounding rock |
投稿时间:2015-08-31 |
DOI:10.13243/j.cnki.slxb.20150926 |
中文关键词: 钢筋混凝土衬砌 数值模拟 界面参数 FLAC |
英文关键词: reinforced concrete lining numerical simulation interface parameters FLAC |
基金项目:国家自然科学基金面上项目(51279201) |
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中文摘要: |
考虑围岩与衬砌相互作用下,如何实现拟衬砌结构的准确模拟是深埋水工隧洞设计施工所重点关心的问题。论文提出了一种"实体单元+结构单元"的钢筋混凝土衬砌模拟方法,并在数值计算软件中实现,对其参数取值开展了研究,确定了适用于该方法的界面刚度计算公式及界面厚度取值范围。得到如下结论:(1)FLAC手册中推荐的界面刚度公式更加适用于该方法;(2)界面厚度的合理取值为0.55倍钢筋半径。最后通过受压和受弯构件的理论解验证了不同受力环境下方法的合理性,并结合锦屏二级水电站引水隧洞钢筋应力的实测数据,验证了结论的适用性,对工程计算中相关参数取值有很好的借鉴意义。 |
英文摘要: |
The way simulating the lining structure accurately considering the interaction with the surrounding rock is one of the focuses of geotechnical engineering. This paper brought a method ("entity elements combine with structural elements") to simulate the reinforced concrete lining, and realized the method in a numerical simulating software. The proper values of the parameters concerned were searched afterward. Conclusions are following:① the recommended formula of the interface stiffness between the steel bars and the concrete in the FLAC USER'S MANUAL is more suitable; ② strong consistency with the practical stress of the reinforcing bars was showed when 0.55*radius of the bars was substituted in the thickness of the interface. The reasonableness of the conclusions has been verified by comparison between numerical and analytical solutions in compression and bending tests. The applicability of the conclusions was verified by comparison with the measured stress of the reinforcement bars of the NO.4 flow tunnel in Jinping Ⅱ Hydropower Station. The conclusions of this paper will show its value on the determination of simulation parameters in the further engineering. |
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