第 29 卷第 9 期 Vol. 29 NO. 9 重庆工商大学学报 ( 自然科学版 ) J Chongqing Technol Business Univ. Nat Sci Ed Sept X * ABAQUS 1 2

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1 第 29 卷第 9 期 Vol. 29 NO. 9 重庆工商大学学报 ( 自然科学版 ) J Chongqing Technol Business Univ. Nat Sci Ed Sept X * ABAQUS 初始地应力是岩土工程数值模拟时必需考虑的重要因素, 如何在 ABAQUS 有限元软件中对初始地应力进行平衡是确保数值计算结果正确性的关键针对 ABAQUS 提供的 4 种不同的初始地应力平衡的方法, 分别举例验证各种方法进行初始地应力平衡的适用性及其优缺点 ; 分析结果表明 : 对于简单岩土体,ABAQUS 提供的自动平衡法关键字定义初始地应力法 ODB 导入法初始地应力提取法都可以达到平衡的效果, 而对于复杂地质条件的岩土体, 只有采用自动平衡法和初始地应力提取法才能获得较好的平衡效果 ; 研究结论可为复杂岩土体数值计算提供了参考 ABAQUS; 初始地应力 ; 平衡 TU521 A 1-3 ANSYS ABAQUS PLAXIS ABAQUS * cstc2011gga

2 9 ABAQUS E - 04 m 2 ABAQUS 5 1 AUTOBALANCE 2 * INITIAL CONDITIONS TYPE = STRESS GEOSTATIC 3 * INITIAL CONDITIONS TYPE = STRESS FILE = file INC = inc 4 * INITIAL CONDITIONS TYPE = STRESS INPUT = XX. DAT 5 * INITIAL CONDITIONS TYPE = STRESS GEOSTATIC USER 5 1 GEOSTATIC 2 3 ODB ODB ODB ODB

78 29 4 S11 S22 S33 S12 S13 S23 5 SIGINI 6-10 3 1 50 m 50 m 30 m X Y Z Mohr-coulomb U1 = U2 = U3 = 0 X U1 U1 = 0 Y U2 U2 = 0 x y z 2 1 1 2 1 γ / kn /m 3 E /MPa ν C /kpa φ / 20

3 S11 S22 S33 S12 S13 S23 5 SIGINI m 50 m 30 m X Y Z Mohr-coulomb U1 = U2 = U3 = 0 X U1 U1 = 0 Y U2 U2 = 0 x y z γ / kn /m 3 E /MPa ν C /kpa φ / /Pa e e - 02 /m e e e e - 18 ODB e e e e ~ 4 cm 4

4 9 ABAQUS Mohr-coulomb 80 m 70 m X Y 38 m 30 m m 5 m x y x y z γ / N /m 3 E C φ ν /MPa /kpa / x Z 6 Z Z Z

5 Z Z Z Z Z Z 5-14 ODB ~ 4 cm ABAQUS 2 ODB

6 9 ABAQUS J J J ABAQUS J ABAQUS M ABAQUS M ABAQUS M ABAQUS J ABAQUS M J Research on Initial Geo-stress Balance Method Based on ABAQUS DAI Ru-lin 1 2 LI Zhong-fang 1 2 WANG Jiao National Inland Waterway Regulation Engineering Research Center Chongqing Jiaotong University Chongqing China 2. Key Laboratory of Hydraulic and Water Engineering of Ministry of Education Chongqing Jiaotong University Chongqing China Abstract Initial geo-stress is an important factor in geo-technical engineering numerical simulation and how to balance initial geo-stress in ABAQUS finite element software is the key to ensuring the validity of numerical calculation results. According to four kinds of different initial geo-stress balance methods provided by ABAQUS this paper separately uses examples to verify the practicability advantages and disadvantages of each method to conduct initial geo-stress balance and analysis results show that as for simple geo-technical the auto-balance method keywords initial geo-stress definition method ODB import method and initial geo-stress extraction method provided by ABAQUS can achieve the balance effect however with regard to geo-technical of complex geo-conditions only auto-balance method and initial geo-stress extraction method can obtain better balance effect. The research conclusion can present reference for numerical calculation of complicated geo-technical. Key words ABAQUS initial geo-stress balance

11 25 stable state. These conclusions were basically consistent with the analysis results of the multi - stage landslide in loess area with the Monte

11 25 stable state. These conclusions were basically consistent with the analysis results of the multi - stage landslide in loess area with the Monte 211 11 11 158 JOURNAL OF RAILWAY ENGINEERING SOCIETY Nov 211 NO. 11 Ser. 158 16-216 211 11-24 - 6 1 2 3 3 3 1. 126 2. 92181 74 3. 181 1 2 3 4 1. 27 1. 3 1. 56 1. 73 4 1 2 3 4. 96 1. 15 1. 48 1. 6 f s =