STUDIES ON SEISMIC RESPONSE OF EXTENDED STRUCTURES IN IRREGULAR SITE AND THE RATIONAL DESIGN CONSIDERATIONS

不规则场地延伸结构地震响应研究及合理设计考虑

• 批准号: 04555111
• 负责人: TAKEMIYA Hirokazu
• 金额: $ 4.22万
• 依托单位: OKAYAMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04555111/
• 关键词: IRREGULAR SITE RESPONSE; BURRIED STRUCTURE; SEISMIC ANALYSIS; BEM-FEM HYBRID ANALYSIS; SIMPLIFIED ANALYSIS; RESPONSE REDUCTION; 境界要素法; ハイブリッド法; 増幅・位相; 非線形; ハイブリッド解析; 波動伝播; 遷移応答; 制振基礎工法

Presented first is the transient seismic response of alluviums with due account for the configuration and the size in view of incident wave types and the lengths, besides the stiffness contrast to the underlain far extening base. Discretization is made such that the near field of complex configuration and irregular material distribution is modeled by the finite elements (FE) and the extending far field by the boundary elements (BE). The time domain BEM-FEM hybrid computation is taken in order to give a clear interpretation to the seismic wave scattering and propagation. Parametric studies are performed aiming at aquiring the relevant soil amplification which is useful information for the structural design on irregualar allumivums.Secondly, discussed is the seismic response of an extended shield tunnel structures to be constructed at irregular sites with due account for the alluvium configuration and size and the stiffness contrast to the underlain far extending base. The BEM-FEM hybird … More formulation is taken for the total system of soil and structure in order to account for the seismic wave scattering due to the presence of the letter. Parametric studies are performed for various wave lengths of the incident SV wave, P wave with different incident angles. The structural internal forces as well as deformation are investigated.Thirdly, for the purpose of practical design procedure of shield tunnels, a simplified 3-dimensional structural model supported by Winkler type springs.is proposed. The behavior of extended buried structures in alluvium deposits with is interpreted due care to the site topography. This is examined from the comparison with the above elaborate BEM-FEM hybrid solution. The matching between these different methods is achieved when an appropriate modification factor is made to the spring constant.Finally, from the design point of view, stiffening of the surrounding sofft soil is proposed in order to avoid excessive response and for the seismic response redunction. Less

首先给出了冲积层的瞬态地震响应，考虑到入射波的类型和长度，除了与下伏远延伸基底的刚度对比之外，还考虑了冲积层的结构和尺寸。离散化，使得复杂的配置和不规则的材料分布的近场模拟的有限元（FE）和扩展的远场的边界元（BE）。为了更好地解释地震波的散射和传播，采用了时域边界元-有限元混合计算方法。通过参数分析，得到了相应的土层放大系数，为不规则冲积层的结构设计提供了有用的信息。其次，考虑冲积层的形状、尺寸以及与下卧延伸基底的刚度对比，讨论了不规则场地上盾构隧道结构的地震响应。边界元-有限元法的混合 ...更多信息 为了考虑字母的存在引起的地震波散射，对土壤和结构的整个系统采用公式。对不同波长的SV波、P波以不同入射角入射时的参数进行了研究。springs.is三，为了便于盾构隧道的实际设计，提出了Winkler型三维结构简化模型。冲积层中延伸的埋藏结构的行为应根据现场地形进行解释。通过与上述边界元-有限元混合解的比较，验证了这一点。最后，从设计的角度出发，提出了对软土地基进行加劲处理，以避免反应过大和地震反应减小。少

项目成果

Takemiya, H.and Sukeyasu, Y.: "Transient response of rigid strip foundations on a halfspace/stratum soil due to impulsive loads" Proc.8th Int.Conf.of the Association for Computer Methods and Advances in Geomechanics. 993-998 (1994)

Takemiya, H. 和 Sukeyasu, Y.：“脉冲载荷导致半空间/地层土壤上刚性条形基础的瞬态响应”计算机方法与地质力学进展协会第 8 届国际会议论文集。

竹宮 宏和: "Transient Lamb's Solution for Surface strip Impulses" J.Eng.Mech.,American Society of civil Engineers.

Hirokazu Takemiya：“表面剥离脉冲的瞬时 Lamb 解决方案”J.Eng.Mech.，美国土木工程师学会。

Takemiya, H., Adam, M.and Yasui, S.: "Transient Seismic Response of Buried Tunnles in Alluvium Sites" Proc.Int.Conf.on Computational Methods in Structural and Geotechnical Engineering. (Hon Kong, ). 1096-1101 (1994)

Takemiya, H.、Adam, M. 和 Yasui, S.：“冲积层埋藏隧道的瞬态地震响应”Proc.Int.Conf.on 结构和岩土工程计算方法。

竹宮 宏和: "地盤-構造物系の振振芸としての波動遮断プログラム(WIB)の導入" 土木学会論文集. 489/I-27. 243-250 (1994)

Hirokazu Takemiya：“作为地面结构系统振动技术的隔波程序 (WIB) 简介”，日本土木工程师学会论文集 489/I-27 (1994)。

H. Takemiya: "Dynamic Characteristics and seismic tesponse of soil-structure systems by time domain boundary element methods" Proc. 2nd Int. Conf. Earthguake Resistant Construction and Design. 2. 341-349 (1994)

H. Takemiya：“通过时域边界元方法研究土壤结构系统的动力特性和地震反应”Proc。