| 带弹簧支撑的新型泥石流拦挡坝抗冲击性能研究 |
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| 引用本文： | 郑国足,;王秀丽,;张守丽.带弹簧支撑的新型泥石流拦挡坝抗冲击性能研究[J].地震学刊,2014(5):551-558. |
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| 作者姓名： | 郑国足 ;王秀丽 ;张守丽 |
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| 作者单位： | [1]兰州理工大学土木工程学院,兰州730050; [2]甘肃省人民医院基建处,兰州730000 |
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| 基金项目： | 国家科技支撑计划项目（2011BAK12B07）; 国家自然科学基金项目（51278236）资助 |
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| 摘 要： | 为了解决普通重力式泥石流拦挡坝在大规模泥石流发生时容易被大块石损毁的问题,提出带弹簧支撑的新型泥石流拦挡坝,并采用钢球代替泥石流中的大块石,运用有限元软件ANSYS/LS-DYNA对这种新型坝体进行泥石流大块石的冲击模拟,从坝体的变形、支反力、Von Mises应力、加速度和应变率5个方面与普通重力式拦挡坝进行对比分析。结果表明：与普通泥石流拦挡坝相比,带弹簧支撑的新型泥石流拦挡坝的支反力可减小3/4左右,钢球的冲击加速度可降到1/3.87,坝体的响应加速度可降到1/2.61,说明带弹簧支撑的新型泥石流拦挡坝具有非常好的抗冲击性能。
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| 关 键 词： | 弹簧支撑 新型泥石流拦挡坝 抗冲击性能 ANSYS/LS-DYNA 数值模拟 |
Research on Impact Resistance for Innovation Debris Flow Blocking Dam Equipped with Spring Support |
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| Institution: | ZHENG Guo-zu , WANG Xiu-li , ZHANG Shou-li (1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2. Infrastructure Department, People＇s Hospital of Gansu Province, Lanzhou 730000, China) |
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| Abstract: | To solve the problem that ordinary gravity dam is easily damaged in large scale debris flows,a new debris flow blocking dam with spring support is proposed,and steel balls are used instead of large debris flow stones. This new type of debris flow dam was simulated under the impact of large debris flow stones by using finite element software Ansys /ls- dyna. The analysis of comparison between the new debris flow blocking dam and the ordinary gravity dam was made on deformation,reaction forces,the von Mises stress,acceleration and strain rate. The results show that compared with the ordinary gravity dam,the reaction forces of the new dam can be reduced to 1 /4,the impact acceleration of the ball can be reduced to 1 /3. 87,and the acceleration response of the dam can be reduced to 1 /2. 61. This research suggests the new style dam with spring support has a very good impact performance. |
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| Keywords: | support with spring new debris flow dam impact resistance ANSYS /LS-DYNA numerical simulation |
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