| SSDI体系非线性耦合阻尼比研究 |
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| 引用本文： | 夏栋舟,何益斌.SSDI体系非线性耦合阻尼比研究[J].中南大学学报(自然科学版),2012,43(2):694-701. |
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| 作者姓名： | 夏栋舟 何益斌 |
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| 作者单位： | 1. 长沙理工大学土木与建筑学院,湖南长沙,410114
2. 湖南大学土木工程学院,湖南长沙,410082 |
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| 基金项目： | 国家自然科学基金资助项目(50778070) |
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| 摘 要： | 通过对土-结构动力相互作用(SSDI)体系简化计算方法的研究,提出改进的考虑基础质量与转动效应的简化计算模型,推导SSDI体系非线性耦合阻尼比计算公式,并通过对公式中每个参数的选取与修正,充分考虑土体与结构的非线性特性、基础形式与基础埋置深度以及基础平动与转动的耦合效应等因素的影响.运用SSDI体系非线性耦合阻尼比公式,对1个实例进行计算.研究结果表明:SSDI体系频率和阻尼比的计算结果与传统方法相比更加接近试验实测结果,且误差为10％～20％,证明了计算公式的有效性,这有助于完善现有抗震设计规范、提出新的抗震设计反应谱.
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| 关 键 词： | 土-结构动力相互作用 简化计算模型 非线性 耦合阻尼比 |
Study of nonlinear coupling damping ratio for soil structure dynamic interaction system |
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| XIA Dong-zhou
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HE Yi-bin.Study of nonlinear coupling damping ratio for soil structure dynamic interaction system[J].Journal of Central South University:Science and Technology,2012,43(2):694-701. |
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| Authors: | XIA Dong-zhou HE Yi-bin |
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| Institution: | 1.School of Civil Engineering and Architecture,Changsha University of Science and Technology,Changsha 410014,China; 2.College of Civil Engineering,Hunan University,Changsha 410082,China) |
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| Abstract: | Through the research of simplified calculation method for soil structure dynamic interaction(SSDI) system,modified simplified model considering foundation quality and rotation effect was proposed,and the formula of nonlinear coupling damping ratio was deduced for SSDI system.Through selecting the parameters of the formula,the nonlinearity for soil and structure,foundation forms and foundation depth,as well as coupling effect for foundation translation and rotation were considered.An example was calculated by using nonlinear coupling damping ratio formula.The results show that the calculation results for frequency and damping are closer to those of the measured test compared with traditional method,and error is 10%?20%,fully indicating the validity of the formula.The results will play an important role in improving the existing seismic design code and producing new seismic design spectrum. |
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| Keywords: | soil structure dynamic interaction(SSDI) simplified mathematical model nonlinearity coupling damping ratio |
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