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1、高速公路隧道施工力学数值模拟分析6.3高速公路隧道施工力学数值模拟分析6.3.2．建模2.材料、实常数和单元类型定义 /NOPR!菜单过滤设置 KEYW,PR_STRUC,1!保留结构分析部分菜单 /PREP7!进入前处理器 ET,1,BEAM3!设置梁单元类型，模拟喷射混凝土 ET,2,PLANE42!设置平面实体单元类型，模拟围岩 KEYOPT,2,3,2!设置成平面应变模式 R,1,0.15,0.000281,0.15,,,,!设置梁单元几何常数 MP,EX,1,,23e9!输入弹性模量 MP,PRXY,1,,0.2
2、!输入泊松比 MP,DENS,1,,2500!输入密度 MP,EX,2,,8e9!输入弹性模量 MP,PRXY,2,,0.28!输入泊松比 MP,DENS,2,,2400!输入密度 TB,DP,2,,,!输入DP模型的相应参数 TBMODIF,1,1,1.2e6!输入凝聚理 TBMODIF,1,2,42!输入摩擦角 MP,EX,3,,16e9!以下输入加固圈（锚杆加固范围）参数 MP,PRXY,3,,0.25 MP,DENS,3,,2500 TB,DP,3,,, TBMODIF,1,1,2.4e6 TBMODIF,
3、1,2,50 SAVE!保存数据库 3.建立几何模型 !计算范围为：埋深50m，隧道底部下14m， !隧道左右两侧选定为34m，故整个模型为110m×70m K,1,21,0,0,!创建关键点 K,2,15,-1,0, K,3,27,-1,0, K,4,0,0,0, K,5,0,21,0, K,6,21,21,0, K,7,42,21,0, K,8,42,0,0, K,9,55,0,0, K,10,55,21,0, K,11,55,56,0, K,12,0,56,0, K,13,21,56,0, K,14
4、,42,56,0, K,15,55,-14,0, K,16,42,-14,0, K,17,27,-14,0, K,18,0,-14,0, KSYMM,X,all,,,,0,0!对称复制所有关键点 NUMMRG,ALL,,,,LOW!合并所有关键点 NUMCMP,ALL!压缩所有关键点编号 SAVE!保存数据库，如图6-18所示 circle,1,6!以关键点1为圆心，半径为6画圆 circle,19,6 ldele,3,4,1!删除直线 ldele,7,8,1 circle,1,8.5 circle,19,8.5
5、 ldele,7,8,1 ldele,11,12,1 LSTR,31,24!通过关键点创建直线 LSTR,18,17 LSTR,17,16 LSTR,16,15 LSTR,15,9 LSTR,9,10 LSTR,10,11 LSTR,11,14 LSTR,14,13 LSTR,13,12 LSTR,12,28 LSTR,28,29 LSTR,29,27 LSTR,27,26 LSTR,26,25 LSTR,25,30 LSTR,30,31 LSTR,31,32 LSTR,32,18 LSTR,
6、8,9 LSTR,8,16 LSTR,8,7 LSTR,7,10 LSTR,7,14 LSTR,33,41 LSTR,41,8 LSTR,17,3 LSTR,3,33 LSTR,18,4 LSTR,4,43 LSTR,43,35 ldele,7 ldel,26 k,,15,-14 k,,-15,-14 LSTR,17,49!通过关键点创建直线 LSTR,49,18 LSTR,49,2 LSTR,2,35 LSTR,18,50 LSTR,4,45 LSTR,45,37 LSTR,37,20 LS
7、TR,20,50 LSTR,50,32 LSTR,2,3 LSTR,35,1 LSTR,1,33 LSTR,1,34 LSTR,32,21 LSTR,21,39 LSTR,21,20 LSTR,19,37 LSTR,19,38 LSTR,19,39 LSTR,39,47 LSTR,47,24 LSTR,24,25 LSTR,24,23 LSTR,26,23 LSTR,23,22 LSTR,22,5 LSTR,5,6 LSTR,6,7 LSTR,6,13 LSTR,5,12 LSTR,22,28
8、 LSTR,23,29 LSTR,46,22 LSTR,38,46 LSTR,4,5 LSTR,42,6 LSTR,34,42 SAVE!保存数据，生成的直线如图6-
