高土石坝地震动最不利输入方向研究
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摘要
文中对土石坝进行三维非线性动力反应分析,采用等价线性粘弹性模型,就地震波的形式、地震波入射角度、坝高等因素对动力反应的响应进行了研究。根据不同形式地震波以不同角度入射到坝体,坝体震动最大加速度的强弱变化情况,判断出土石坝地震动的最不利入射角度。结果表明,对于高100,200,300 m的土石坝,(15°,15°)为地震动入射的最不利角度。
The paper analyzes the three-dimensional nonlinear dynamic response for the earth-rock dam by using the equivalent linear viscoelastic model and studies the response of seismic wave form,seismic wave incident angle,dam height and other factors on the dynamic reaction.According to the different form seismic waves incident on the dam with the different angles,the critical incident angle of seismic input could be determined through the strength changes of maximum acceleration of high earth-rock dam seismic.The results show that(15°,15°) is the critical incident angle of seismic input for the earth-rock dam with 100,200 and 300m height.
The paper analyzes the three-dimensional nonlinear dynamic response for the earth-rock dam by using the equivalent linear viscoelastic model and studies the response of seismic wave form,seismic wave incident angle,dam height and other factors on the dynamic reaction.According to the different form seismic waves incident on the dam with the different angles,the critical incident angle of seismic input could be determined through the strength changes of maximum acceleration of high earth-rock dam seismic.The results show that(15°,15°) is the critical incident angle of seismic input for the earth-rock dam with 100,200 and 300m height.
引文
[1]吴兆营.倾斜入射条件下土石坝最不利地震动输入研究[D].中国地震局工程力学研究所,2007.
[2]范立础,聂利英,李建中.复杂结构地震波输入最不利方向标准问题[J].同济大学学报,2003,31(6):631-636.
[3]顾淦臣,沈长松,岑威钧.土石坝地震工程学[M].北京:水利水电出版社,2009.
[4]孔宪京,娄树莲,邹德高.筑坝堆石料的等效动剪切模量与等效阻尼比[J].水利学报,2001,32(8):20-25.
[2]范立础,聂利英,李建中.复杂结构地震波输入最不利方向标准问题[J].同济大学学报,2003,31(6):631-636.
[3]顾淦臣,沈长松,岑威钧.土石坝地震工程学[M].北京:水利水电出版社,2009.
[4]孔宪京,娄树莲,邹德高.筑坝堆石料的等效动剪切模量与等效阻尼比[J].水利学报,2001,32(8):20-25.
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