Development of Computer Simulator for Rigid Blocks under Earthquake Excitations

地震激励下刚性块体计算机模拟器的研制

• 批准号: 06558053
• 负责人: YAMAZAKI Fumio
• 金额: $ 5.44万
• 依托单位: University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06558053/
• 关键词: Earthquake; Interior Object; Overturning; Distinct Element Method; Simulation; Shaking Table Test

Shaking table tests were conducted to investigate the response of rectangular wooden blocks and block assemblies of various sizes and slenderness to harmonic and earthquake base excitation. The shaking table tests were followed by analytical and numerical studies in order to estabish criteria for the initiation of rocking and overturning of rigid blocks. The Distinct Element Method (DEM) was employed as a tool of numerical simulation. From the comparison study with the results of the experiments and analytical solutions, DEM was found to have good accuracy for this problem.The DEM was further utilized to establish overturning criteria of rigid blocks. For a set natural earthquake, motions, numerical studies were conducted and a relationship of overturning was proposed as a function of size, slenderness ratio, peak input acceleration and peak input velocity.This relationship may be conveniently used in seismic risk estimation of interior objects subjected to strong earthquake motion.

通过振动台试验研究了不同尺寸和细长度的矩形木块和木块组合在简谐和地震基底激励下的响应。在振动台试验之后进行了分析和数值研究，以便建立刚性块体开始摇摆和倾覆的准则。采用离散单元法（DEM）作为数值模拟的工具。通过与试验结果和解析解的对比研究，发现离散元法具有较好的精度，并进一步利用离散元法建立了刚性块体的倾覆判据。对一组天然地震运动进行了数值研究，提出了倾覆与尺寸、长细比、峰值输入加速度和峰值输入速度的关系式，可方便地用于强震运动作用下内部物体的地震危险性评估。

项目成果

T.Winkler, K.Meguro and F.Yamazaki: "Response of Interior Objects to Earthquakes" Proceedings of the 50th Annual Conference of Japan Society of Civil Engineers. I-B. 1172-1173 (1995)

T.Winkler、K.Meguro 和 F.Yamazaki：“内部物体对地震的响应”日本土木工程师学会第 50 届年会论文集。

T.Winkler: "Response of Rigid Body Assemblies to Dynamic Excitation" Earthquake Engineering and Structural Dynamics. 24. 1389-1408 (1995)

T.Winkler：“刚体组件对动态激励的响应”地震工程和结构动力学。

T.Winkler: "Response of Rigid Body Assemblies to Dynamic Excitation" 第9回日本地震工学シンポジウム論文集. 3. 139-144 (1994)

T. Winkler：“刚体组件对动态激励的响应”第九届日本地震工程研讨会论文集 3. 139-144 (1994)。

T.Winkler: "Overturning of Rigid Bodies under Dynamic Excitation" Proc.of 5th U.S.National Conference on Earthquake Engineering. 2. 859-868 (1994)

T.Winkler：“动态激励下的刚体翻转”第五届美国全国地震工程会议论文集。

T.Winkler, K.Meguro and F.Yamazaki: "Response of Interior Objects to Earthquake" Proceedings of the 23th Japan Society of Civil Engineers Earthquake Engineering Symposium. 553-556 (1995)

T.Winkler、K.Meguro 和 F.Yamazaki：“内部物体对地震的响应”第 23 届日本土木工程师学会地震工程学研讨会论文集。