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 land, and there has been no systematic research of dynamic characteristics of the typical soil types The dynamic nonlinear parameters of 372 groups of soil samples were collected, and were tested by concentrated on on the seafloor. dynamic tri-axi- al 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 cal- culated 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 byYUAN 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 val- ues. The statistical mean values are believable, and they are necessary in the case that the tested soil dynamic pa- rameters are not enough at the Bohai Sea sites.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2012年第9期1079-1085,共7页
Journal of Harbin Engineering University
基金
中央级公益性科研院所基本科研业务专项基金资助项目(ZDJ2012-12)
国家自然科学基金资助项目(50978237)
财政部地震科研行业专项基金资助项目(200708055)
关键词
渤海海域
动力非线性参数
统计平均值
合理性分析
soil of Bohai seafloor
dynamic nonlinear parameter
statistical mean value
rationality analysis
