半空间上水平层状场地自振频率特性研究
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摘要
在传统的基于集中质量矩阵的剪切质点系法(集中质量法)基础上,发展了基于一致质量矩阵的剪切质点系法(一致质量法),利用剪切质点系法对半空间上水平层状场地自振频率特性进行了分析,主要考虑了土层剪切模量分布、土层层厚分布以及覆盖层总厚度3个因素对场地自振频率的影响,并总结了影响规律,同时考虑了计算厚度选取的问题。分析结果表明:所得结论对于建筑场地地震分析、结构抗震以及剪切质点系法的工程应用均具有一定的实际意义。
On the basis of traditional shear particle system method(lumped mass method),a new shear particle system method based on consistent mass matrix(consistent mass method) was developed.Then,natural frequency characteristics of horizontal layered soils were analyzed with shear particle system method.The distribution of soil layer shear modulus and thickness and the total thickness of soil layers were considered and the influencing law was summarized.At the same time,the problem of computing thickness was considered.The analysis results show that the conclusions have practical meanings to field earthquake analysis,structure earthquake-resistance and apply of shear particle system method.
On the basis of traditional shear particle system method(lumped mass method),a new shear particle system method based on consistent mass matrix(consistent mass method) was developed.Then,natural frequency characteristics of horizontal layered soils were analyzed with shear particle system method.The distribution of soil layer shear modulus and thickness and the total thickness of soil layers were considered and the influencing law was summarized.At the same time,the problem of computing thickness was considered.The analysis results show that the conclusions have practical meanings to field earthquake analysis,structure earthquake-resistance and apply of shear particle system method.
引文
[1]高振世,朱继澄.建筑结构抗震设计[M].北京:中国建筑工业出版社,1997.GAO Zhen-shi,ZHU Ji-cheng.Earthquake ResistanceDesign of Building Structure[M].Beijing:ChinaArchitecture&Building Press,1997.
[2]王钟琦.地震工程地质导论[M].北京:地震出版社,1983.WANG Zhong-qi.Introduction of Earthquake Engin-eering Geology[M].Beijing:Earthquake PublishingHouse,1983.
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[4]陈龙珠,吴世明.用机械阻抗法求成层地基的固有频率[J].岩土工程学报,1989,11(2):82-87.CHEN Long-zhu,WU Shi-ming.Natural Frequencyof Layered Soils by Mechanical Impedance Method[J].Chinese Journal of Geotechnical Engineering,1989,11(2):82-87.
[5]葛双成.场地卓越周期计算浅议[J].浙江建筑,1999(1):32-33.GE Shuang-cheng.Discussion of Site PredominantPeriod Calculation[J].Zhejiang Construction,1999(1):32-33.
[6]IDRISS I M,SEED H B.Seismic Response of Hori-zontal Soil Layers[J].Journal of the Soil Mechanicsand Foundations Division,1968,94(4):1003-1034.
[7]刘增武.场地土层的周期特性[R].北京:中国科学院工程力学研究所,1978.LIU Zeng-wu.Period Characteristics of Site SoilLayers[R].Beijing:Engineering Mechanics Instituteof Chinese Academy of Science,1978.
[8]吴世明.土动力学[M].北京:中国建筑工业出版社,2000:210-211.WU Shi-ming.Soil Dynamics[M].Beijing:ChinaArchitecture&Building Press,2000:210-211.
[9]浙江大学建筑设计研究院.杭州CBD尊宝大厦工程勘察报告[R].杭州:浙江大学,2005:12-18.Architectural Design and Research Institute of Zhe-jiang University.Investigation Report of HangzhouCBD Zunbao Building[R].Hangzhou:Zhejiang Uni-versity,2005:12-18.
[10]浙江大学土木工程测试中心.杭州CBD尊宝大厦场地地脉动测试报告[R].杭州:浙江大学,2005:8-10.Civil Engineering Testing Centre of Zhejiang Univer-sity.Microtremors Test Report of Hangzhou CBDZunbao Building[R].Hangzhou:Zhejiang University,2005:8-10.
[11]GB 50011—2001,建筑抗震设计规范[S].GB 50011—2001,Code for Seismic Design of Building[S].
[2]王钟琦.地震工程地质导论[M].北京:地震出版社,1983.WANG Zhong-qi.Introduction of Earthquake Engin-eering Geology[M].Beijing:Earthquake PublishingHouse,1983.
[3]熊建国,许贻燕.分层土自振特性分析[J].地震工程与工程振动,1986,6(4):21-35.XIONG Jian-guo,XU Yi-yan.Free Vibration Analysisof Layered Soils[J].Earthquake Engineering and En-gineering Vibration,1986,6(4):21-35.
[4]陈龙珠,吴世明.用机械阻抗法求成层地基的固有频率[J].岩土工程学报,1989,11(2):82-87.CHEN Long-zhu,WU Shi-ming.Natural Frequencyof Layered Soils by Mechanical Impedance Method[J].Chinese Journal of Geotechnical Engineering,1989,11(2):82-87.
[5]葛双成.场地卓越周期计算浅议[J].浙江建筑,1999(1):32-33.GE Shuang-cheng.Discussion of Site PredominantPeriod Calculation[J].Zhejiang Construction,1999(1):32-33.
[6]IDRISS I M,SEED H B.Seismic Response of Hori-zontal Soil Layers[J].Journal of the Soil Mechanicsand Foundations Division,1968,94(4):1003-1034.
[7]刘增武.场地土层的周期特性[R].北京:中国科学院工程力学研究所,1978.LIU Zeng-wu.Period Characteristics of Site SoilLayers[R].Beijing:Engineering Mechanics Instituteof Chinese Academy of Science,1978.
[8]吴世明.土动力学[M].北京:中国建筑工业出版社,2000:210-211.WU Shi-ming.Soil Dynamics[M].Beijing:ChinaArchitecture&Building Press,2000:210-211.
[9]浙江大学建筑设计研究院.杭州CBD尊宝大厦工程勘察报告[R].杭州:浙江大学,2005:12-18.Architectural Design and Research Institute of Zhe-jiang University.Investigation Report of HangzhouCBD Zunbao Building[R].Hangzhou:Zhejiang Uni-versity,2005:12-18.
[10]浙江大学土木工程测试中心.杭州CBD尊宝大厦场地地脉动测试报告[R].杭州:浙江大学,2005:8-10.Civil Engineering Testing Centre of Zhejiang Univer-sity.Microtremors Test Report of Hangzhou CBDZunbao Building[R].Hangzhou:Zhejiang University,2005:8-10.
[11]GB 50011—2001,建筑抗震设计规范[S].GB 50011—2001,Code for Seismic Design of Building[S].
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