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| Fuzzy Comprehensive Assessment Method to Determine Tectonic Stress Patterns | |
| 作者姓名： | 张海 戚蓝 郝彩哲 郭磊 |
| 作者单位： | School of Civil Engineering Tianjin University，School of Civil Engineering，Tianjin University，Chengde Petroleum College，School of Civil Engineering，Tianjin University，Tianjin 300072，China，Tianjin Institute of Urban Construction，Tianjin 300384，China，Tianjin 300072，Chengde 067000，China，Tianjin 300072 |
| 摘 要： | The tectonic stress patterns were determined by a fuzzy comprehensive assessment method. Data of in-situ survey and fault information were utilized in the method. First, by making pressure and tension in the directions of along-river, cross-river, shear clockwise, and shear counterclockwise , 26 types of tectonic stress patterns were presented. And the stress vector of each pattern was obtained with FE software by taking unit displacement as boundary load. Then, by taking the 26 types of tectonic stress patterns as index set and 3 main stresses as factor set and choosing various operators, comparison of directions of computational stress vector and survey stress vector was made and the most possible tectonic stress pattern was obtained. Taking the 26 types of tectonic stress patterns as index set and strike angle as factor set, comparison of relationships between formation of fault and tectonic stress was made,and the tectonic stress patterns were assessed with known fault information. By summarizing the above assessment results, the most impossible tectonic stress pattern was obtained . Finally an engineering case was quoted to validate that the method is more feasible and reliable than traditional empirical method. |
| 关 键 词： | 内部压力 构造压力模型 模糊理论 工程机械 |
Fuzzy Comprehensive Assessment Method to Determine Tectonic Stress Patterns |
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| ZHANG Hai,QI Lan,HAO Caizhe,GUO Lei.Fuzzy Comprehensive Assessment Method to Determine Tectonic Stress Patterns[J].Transactions of Tianjin University,2007,13(6):462-468. | |
| Authors: | ZHANG Hai QI Lan HAO Caizhe GUO Lei |
| Institution: | 1. School of Civil Engineering, Tianjin University, Tianjin 300072, China; Tianjin Institute of Urban Construction, Tianjin 300384,China 2. School of Civil Engineering, Tianjin University, Tianjin 300072, China 3. Chengde Petroleum College, Chengde 067000, China |
| Abstract: | The tectonic stress patterns were determined by a fuzzy comprehensive assessment method. Data of in-situ survey and fault information were utilized in the method. First, by making pressure and tension in the directions of along-river, cross-river, shear clockwise, and shear counterclockwise , 26 types of tectonic stress patterns were presented. And the stress vector of each pattern was obtained with FE software by taking unit displacement as boundary load. Then, by taking the 26 types of tectonic stress patterns as index set and 3 main stresses as factor set and choosing various operators, comparison of directions of computational stress vector and survey stress vector was made and the most possible tectonic stress pattern was obtained. Taking the 26 types of tectonic stress patterns as index set and strike angle as factor set, comparison of relationships between formation of fault and tectonic stress was made,and the tectonic stress patterns were assessed with known fault information. By summarizing the above assessment results, the most impossible tectonic stress pattern was obtained . Finally an engineering case was quoted to validate that the method is more feasible and reliable than traditional empirical method. |
| Keywords: | in-situ stress tectonic stress patterns fuzzy comprehensive assessment fault |
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