渤海土类动力非线性参数及合理性
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摘要
针对当前我国土动力学特性理论研究大多集中在陆地,而海域典型土类的动力特征尚无系统性研究成果的问题,收集整理了渤海海域近40个海洋石油平台地震安全性评价报告中动三轴试验取得的372组土体动力非线性参数数据,给出了渤海海域不同土类不同埋深的动剪切模量比和阻尼比的统计平均值.以典型场地为基础,对比分析了所给出的统计平均值与规范值、推荐值对场地地震动参数的影响,论证了所给出的平均值的合理性.研究结果表明,与规范值、推荐值对比,所给出的统计平均值与实测值的地震反应分析结果吻合程度高,合理可信,为渤海场地土动力学参数实测数据不足情况下的必要补充.
In recent years,the theoretical studies of soil dynamic characteristics have been mostly concentrated on land,and there has been no systematic research of dynamic characteristics of the typical soil types on the seafloor.The dynamic nonlinear parameters of 372 groups of soil samples were collected,and were tested by dynamic tri-axial tests in about 40 of the seismic safety evaluation reports of ocean platforms in the Bohai Sea.The dynamic shear modulus ratios and the damping ratios of different types of soils with different depths on the Bohai seafloor were calculated and their statistical mean values were obtained.Based on two typical sites,the influences of the statistical mean values in this paper,standard values in the code DB001-94,and the recommended values by YUAN X.M.(2000) on seismic ground parameters were compared and analyzed.The rationality of the statistical mean values was demonstrated.The results indicate that the seismic response results using the statistical mean values are closer to the results of using the real test values than the results of using the values in the code and the recommended values.The statistical mean values are believable,and they are necessary in the case that the tested soil dynamic parameters are not enough at the Bohai Sea sites.
In recent years,the theoretical studies of soil dynamic characteristics have been mostly concentrated on land,and there has been no systematic research of dynamic characteristics of the typical soil types on the seafloor.The dynamic nonlinear parameters of 372 groups of soil samples were collected,and were tested by dynamic tri-axial tests in about 40 of the seismic safety evaluation reports of ocean platforms in the Bohai Sea.The dynamic shear modulus ratios and the damping ratios of different types of soils with different depths on the Bohai seafloor were calculated and their statistical mean values were obtained.Based on two typical sites,the influences of the statistical mean values in this paper,standard values in the code DB001-94,and the recommended values by YUAN X.M.(2000) on seismic ground parameters were compared and analyzed.The rationality of the statistical mean values was demonstrated.The results indicate that the seismic response results using the statistical mean values are closer to the results of using the real test values than the results of using the values in the code and the recommended values.The statistical mean values are believable,and they are necessary in the case that the tested soil dynamic parameters are not enough at the Bohai Sea sites.
引文
[1]胡聿贤.地震工程学[M].2版.北京:地震出版社,2006:222-227.
[2]SEED H B,IDRISS I M.The influence of soil conditions onground motions during earthquakes[J].Journal of the SoilMechanics and Foundation Divison,1969:99-137.
[3]石兆吉.土壤的动剪切模量和阻尼比,地震小区划-理论与实践[M].北京:地震出版社,1989:134-140.
[4]DB001-94,工程场地地震安全性评价工作规范[S].北京:地震出版社,1994:1-50.
[5]袁晓铭,孙锐,孙静,等.常规土类动剪切模量和阻尼比试验研究[J].地震工程与工程振动,2000,20(4):133-139.YUAN Xiaoming,SUN Rui,SUN Jing,et al.Laboratory ex-perimental study on dynamic shear modulus ratio and damp-ing ratio of soils[J].Earthquake Engineering and Engineer-ing Vibration,2000,20(4):133-139.
[6]孙静,袁晓铭,孙锐.土动剪切模量和阻尼比的推荐值和规范值的合理性比较[J].地震工程与工程振动,2004,24(2):125-133.SUN Jing,YUAN Xiaoming,SUN Rui.Reasonability com-parison between recommended and code values of dynamicshear modulus and damping ratio of soils[J].EarthquakeEngineering and Engineering Vibration,2004,24(2):125-133.
[7]张亚军,兰宏亮,崔永高.上海地区土动剪切模量比和阻尼比的统计研究[J].世界地震工程,2010,26(2):171-175.ZHANG Yajun,LAN Hongliang,CUI Yonggao.Statisticalstudies on shear modulus ratios and damping ratios of soil inShanghai area[J].World Earthquake Engineering,2010,26(2):171-175.
[8]吕悦军,唐荣余,沙海军.渤海海底土类动剪切模量比和阻尼比试验研究[J].防灾减灾工程学报,2003,23(2):35-42.LYU Yuejun,TANG Rongyu,SHA Haijun.Experimentalstudy on dynamic shear modulus ratio and damping ratio ofthe soils of Bohai seafloor[J].Journal of Disaster Preven-tion and Mitigation Engineering,2003,23(2):35-42.
[9]中海油田服务股份有限公司油田物探事业部勘察服务中心.BZ29-4、LD32-2PSP油田开发平台场址和管线路由工程地质和工程物探调查[R].北京:中海油田服务股份有限公司项目报告,2007.
[10]廖振鹏,李小军.地表土层地震反应的等效线性化解法[C]//地震小区划—理论与实践,北京:地震出版社,1989:141-153.
[11]廖振鹏,李大华.设计地震反应谱的双参数标定模型[C]//地震小区划—理论与实践,北京:地震出版社,1989:196-206.
[2]SEED H B,IDRISS I M.The influence of soil conditions onground motions during earthquakes[J].Journal of the SoilMechanics and Foundation Divison,1969:99-137.
[3]石兆吉.土壤的动剪切模量和阻尼比,地震小区划-理论与实践[M].北京:地震出版社,1989:134-140.
[4]DB001-94,工程场地地震安全性评价工作规范[S].北京:地震出版社,1994:1-50.
[5]袁晓铭,孙锐,孙静,等.常规土类动剪切模量和阻尼比试验研究[J].地震工程与工程振动,2000,20(4):133-139.YUAN Xiaoming,SUN Rui,SUN Jing,et al.Laboratory ex-perimental study on dynamic shear modulus ratio and damp-ing ratio of soils[J].Earthquake Engineering and Engineer-ing Vibration,2000,20(4):133-139.
[6]孙静,袁晓铭,孙锐.土动剪切模量和阻尼比的推荐值和规范值的合理性比较[J].地震工程与工程振动,2004,24(2):125-133.SUN Jing,YUAN Xiaoming,SUN Rui.Reasonability com-parison between recommended and code values of dynamicshear modulus and damping ratio of soils[J].EarthquakeEngineering and Engineering Vibration,2004,24(2):125-133.
[7]张亚军,兰宏亮,崔永高.上海地区土动剪切模量比和阻尼比的统计研究[J].世界地震工程,2010,26(2):171-175.ZHANG Yajun,LAN Hongliang,CUI Yonggao.Statisticalstudies on shear modulus ratios and damping ratios of soil inShanghai area[J].World Earthquake Engineering,2010,26(2):171-175.
[8]吕悦军,唐荣余,沙海军.渤海海底土类动剪切模量比和阻尼比试验研究[J].防灾减灾工程学报,2003,23(2):35-42.LYU Yuejun,TANG Rongyu,SHA Haijun.Experimentalstudy on dynamic shear modulus ratio and damping ratio ofthe soils of Bohai seafloor[J].Journal of Disaster Preven-tion and Mitigation Engineering,2003,23(2):35-42.
[9]中海油田服务股份有限公司油田物探事业部勘察服务中心.BZ29-4、LD32-2PSP油田开发平台场址和管线路由工程地质和工程物探调查[R].北京:中海油田服务股份有限公司项目报告,2007.
[10]廖振鹏,李小军.地表土层地震反应的等效线性化解法[C]//地震小区划—理论与实践,北京:地震出版社,1989:141-153.
[11]廖振鹏,李大华.设计地震反应谱的双参数标定模型[C]//地震小区划—理论与实践,北京:地震出版社,1989:196-206.
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