P波空间斜入射下沥青混凝土面板堆石坝响应特性及面板破坏评价
TV312; 地震波入射方位和斜入射角度对于沥青混凝土面板堆石坝地震响应结果有着显著影响.本文从地震动传播机制出发,基于波场叠加原理,推导了P波以任意入射方位角和斜入射角空间斜入射下弹性半空间自由场计算公式,建立了 P波空间斜入射波动输入模型.以不同应变率下的沥青混凝土单轴动态拉伸试验结果为基础,提出了考虑抗拉强度随应变率实时变化的沥青混凝土面板破坏评价方法.考虑16种不同入射方位角和斜入射角下的P波空间斜入射工况,从面板应力和加速度两方面分析了入射方位角和斜入射角对某实际沥青混凝土面板地震响应特性的影响,并进行了沥青混凝土面板的抗拉破坏评价,分析了静态评价方法与动态评价方法的差异.结果表明:...
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| Published in | 工程科学与技术 Vol. 56; no. 4; pp. 205 - 215 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安 710048%西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安 710048
01.07.2024
西华大学能源与动力工程学院,四川成都 610039 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 2096-3246 |
| DOI | 10.15961/j.jsuese.202201174 |
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| Abstract | TV312; 地震波入射方位和斜入射角度对于沥青混凝土面板堆石坝地震响应结果有着显著影响.本文从地震动传播机制出发,基于波场叠加原理,推导了P波以任意入射方位角和斜入射角空间斜入射下弹性半空间自由场计算公式,建立了 P波空间斜入射波动输入模型.以不同应变率下的沥青混凝土单轴动态拉伸试验结果为基础,提出了考虑抗拉强度随应变率实时变化的沥青混凝土面板破坏评价方法.考虑16种不同入射方位角和斜入射角下的P波空间斜入射工况,从面板应力和加速度两方面分析了入射方位角和斜入射角对某实际沥青混凝土面板地震响应特性的影响,并进行了沥青混凝土面板的抗拉破坏评价,分析了静态评价方法与动态评价方法的差异.结果表明:所建立的P波空间斜入射波动输入模型能够准确模拟半空间自由场,波动输入数值解与解析解符合良好;与垂直输入射相比,面板顺水流向、垂直水流向加速度峰值最大分别增加135.9％和92.7％,竖向加速度峰值最大减少68.3％;空间斜输入导致面板动应力增大,主拉应力和主压应力最大分别增加3.6倍和2.7倍,忽略入射方位角和斜入射角可能会严重低估面板的地震响应.传统将静态强度提高30％作为动态强度的面板抗拉破坏判别方法过于严格,本文提出的考虑应变率效应的沥青混凝土面板破坏评价方法较为符合实际. |
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| AbstractList | TV312; 地震波入射方位和斜入射角度对于沥青混凝土面板堆石坝地震响应结果有着显著影响.本文从地震动传播机制出发,基于波场叠加原理,推导了P波以任意入射方位角和斜入射角空间斜入射下弹性半空间自由场计算公式,建立了 P波空间斜入射波动输入模型.以不同应变率下的沥青混凝土单轴动态拉伸试验结果为基础,提出了考虑抗拉强度随应变率实时变化的沥青混凝土面板破坏评价方法.考虑16种不同入射方位角和斜入射角下的P波空间斜入射工况,从面板应力和加速度两方面分析了入射方位角和斜入射角对某实际沥青混凝土面板地震响应特性的影响,并进行了沥青混凝土面板的抗拉破坏评价,分析了静态评价方法与动态评价方法的差异.结果表明:所建立的P波空间斜入射波动输入模型能够准确模拟半空间自由场,波动输入数值解与解析解符合良好;与垂直输入射相比,面板顺水流向、垂直水流向加速度峰值最大分别增加135.9％和92.7％,竖向加速度峰值最大减少68.3％;空间斜输入导致面板动应力增大,主拉应力和主压应力最大分别增加3.6倍和2.7倍,忽略入射方位角和斜入射角可能会严重低估面板的地震响应.传统将静态强度提高30％作为动态强度的面板抗拉破坏判别方法过于严格,本文提出的考虑应变率效应的沥青混凝土面板破坏评价方法较为符合实际. |
| Abstract_FL | The seismic wave incidence azimuth and oblique incidence angle significantly impact the seismic response results of asphalt concrete-faced rockfill dams.This study derives the calculation formula for the free field in elastic half space under the oblique incidence of P waves from any azimuth and angle based on the propagation mechanism of ground motion and the superposition principle of wave fields.In addition,a model for oblique wave input in P-wave space is established.Utilizing the results from uniaxial dynamic tensile tests of asphalt concrete under different strain rates,this study proposes a failure evaluation method for asphalt concrete panels that accounts for the real-time variation of tensile strength with strain rates.Considering 16 different incident azimuths and oblique angles of P-wave spatial oblique incidence conditions,this research ana-lyzes the influence of these factors on the seismic response characteristics of an actual asphalt concrete panel from the aspects of panel stress and acceleration.The evaluation of tensile failure in asphalt concrete panels is conducted,and the differences between static and dynamic evaluation methods are discussed.The results indicate that the established P-wave spatial oblique incidence wave input model can accurately simulate the free field in half space,and the numerical solution aligns well with the analytical solution.Compared to a vertical input beam,the peak accelera-tion of the panel increases by 135.9％along the water flow direction and 92.7％perpendicular to the water flow direction,while the peak vertical acceleration decreases by 68.3％.The spatial oblique input significantly increases the dynamic stress of the panel,with the maximum principal tensile stress and principal compressive stress increasing by 3.6 and 2.7 times,respectively.Neglecting the incident azimuth and oblique incid-ence angles may seriously underestimate the seismic response of the panel.The traditional method of estimating the tensile failure of asphalt con-crete panels through increasing the static strength by 30％as the dynamic strength is overly stringent.The proposed evaluation method,consider-ing the strain rate effect,aligns more closely with real-world conditions. |
| Author | 李闯 宋志强 王飞 |
| AuthorAffiliation | 西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安 710048%西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安 710048;西华大学能源与动力工程学院,四川成都 610039 |
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| Author_FL | WANG Fei SONG Zhiqiang LI Chuang |
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| DocumentTitle_FL | Response Characteristics and Panel Failure Evaluation of Asphalt Concrete Faced Rockfill Dam Under Spatial Oblique Incidence of P Wave |
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| Keywords | earthquake response spatial oblique incidence tension failure 沥青混凝土面板堆石坝 空间斜入射 地震响应 抗拉破坏 asphalt concrete faced rockfill dam |
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| Publisher | 西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安 710048%西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安 710048 西华大学能源与动力工程学院,四川成都 610039 |
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| Snippet | TV312; 地震波入射方位和斜入射角度对于沥青混凝土面板堆石坝地震响应结果有着显著影响.本文从地震动传播机制出发,基于波场叠加原理,推导了P波以任意入射方位角和斜入射角空间斜入射下弹性半空间自由场计算公式,建立了... |
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| Title | P波空间斜入射下沥青混凝土面板堆石坝响应特性及面板破坏评价 |
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