基于FLAC 3D 梁单元修正的隧道/巷道拱架支护模拟方法(英文)
发布时间:2021-12-16 04:04
目的:基于常用的数值模拟软件FLAC3D进行二次开发,弥补现有数值模拟方法的缺陷,提出一种准确有效的隧道/巷道拱架支护数值模拟方法。创新点:1.引入抗弯和抗压能力的相关性,改进梁单元压弯极限判据;2.通过FISH语言编程,实现梁单元修正和拱架精确模拟。方法:1.通过对FLAC3D中梁单元支撑理论的分析,明确其存在的缺陷,并利用算例进行证实(图46);2.基于传统强度理论,对梁单元现有压弯极限判据进行改进(图7和8);3.通过FISH语言编程,实现梁单元修正模型嵌入(图9);4.通过算例分析,对新模拟方法的效果进行验证(图10和13)。结论:1.改进了梁单元压弯极限判据,通过FISH语言编程实现了梁单元的修正及拱架屈服失效的模拟。2.构件压弯试验和巷道拱架支护实例分析表明:修正模型体现了在压弯组合荷载作用下梁单元屈服时弯矩和轴力的相关性;实现程序是有效的且灵敏度较高;提出的新模拟方法使计算偏差得到有效压制,拱架模型呈现出的力学行为及围岩支护作用更加接近实际,计算精度和设计可靠度更高。
【文章来源】:Journal of Zhejiang University-Science A(Applied Physics & Engineering). 2017,18(03)EISCICSCD
【文章页数】:15 页
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本文编号:3537444
【文章来源】:Journal of Zhejiang University-Science A(Applied Physics & Engineering). 2017,18(03)EISCICSCD
【文章页数】:15 页
【参考文献】:
期刊论文
[1]成层土中地下水渗流对盾构隧道开挖面稳定影响上限分析(英文)[J]. Wei LIU,Bettina ALBERS,Yu ZHAO,Xiao-wu TANG. Journal of Zhejiang University-Science A(Applied Physics & Engineering). 2016(11)
[2]考虑受损基元承载影响的岩石统计损伤本构模型及工程应用(英文)[J]. Ting-chun LI,Lian-xun LYU,Shi-lin ZHANG,Jie-cheng SUN. Journal of Zhejiang University-Science A(Applied Physics & Engineering). 2015(08)
[3]FLAC3D中锚杆破断失效的实现及应用[J]. 李为腾,杨宁,李廷春,王刚,梅玉春,玄超. 岩石力学与工程学报. 2016(04)
[4]软土地面中机械化双叠隧道的三维数值模拟(英文)[J]. Ngoc-Anh DO,Daniel DIAS,Pierpaolo ORESTE. Journal of Zhejiang University-Science A(Applied Physics & Engineering). 2014(11)
[5]Implementation and verification of interface constitutive model in FLAC3D[J]. Hai-min WU*1, Yi-ming SHU1, Jun-gao ZHU2 1. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, P. R. China 2. Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, P. R. China. Water Science and Engineering. 2011(03)
[6]FLAC锚杆单元模型的修正及其应用[J]. 漆泰岳,陆士良,高波. 岩石力学与工程学报. 2004(13)
本文编号:3537444
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