EVALUATION OF DYNAMIC SOIL-PILE-STRUCTURE INTERACTION DURING SOIL LIQUEFACTION AND CYCLIC MOBILITY
土壤液化和循环流动过程中动态土-桩-结构相互作用的评估
基本信息
- 批准号:07455216
- 负责人:
- 金额:$ 3.2万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:1995
- 资助国家:日本
- 起止时间:1995 至 1996
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The conditions causing soil liquefaction and resulting damage to building foundations in the 1995 Hyogoken-Nambu earthquake are examined. It is shown that possible causes fo the foundation damage include : (1) horizontal forces and overturning moments imposed on the foundation from the superstructures, (2) kinematic forces acting on deep foundations due to shear deformation of soils, (3) reduction in bearing capacity due to ground failures including liquefaction, and (4) lateral spreading.Both failure and deformation modes are examined using a borehole camera and a slope-indicator for prestressed concrete piles of buildings that experienced liquefaction-induced ground displacement during the 1995 Hyogoken-Nambu earthquake. It is shown that the damage is concentrated at the interface between liquefied and non-liquefied layrs, suggesting the significant effect of ground displacement on pile damage.Centrifuge shaking table tests are conducted on a soil-pile-structure model to investigate the effects of ground displacement and inertia force from the superstructure on stresses in piles during soil liquefaction. It is shown that the ground displacement and inertia force are in phase if the natural period of the structure is less than that of the soil deposit, whereas they are out of phase if the natural period of the structure is greater than that of the soil deposit.An analytical model is then proposed in which a group of piles connected with the same foundation is subjected to lateral ground displacement and inertia force, and the stress and displacement of the piles are calculated. The computed failure and deformation modes agree reasonably well with the field observations, confirming that the proposed analytical model could be effectively used to estimate stresses in piles during soil liquefaction.
研究了1995年日本南部地震中引起土壤液化和对建筑物地基造成破坏的条件。结果表明,地基破坏的可能原因包括:(1)上部结构施加在地基上的水平力和倾覆力矩,(2)土的剪切变形作用于深层地基的运动力,(3)地基液化等地基破坏导致的承载力降低,以及(4)横向扩展。通过土体-桩-结构模型的离心式振动台试验,研究了土体液化过程中地基位移和上部结构惯性力对桩体内应力的影响。结果表明,当结构的自振周期小于土体的自振周期时,地基位移和惯性力是同步的,而当结构的自振周期大于土体的自振周期时,地基的位移和惯性力是异相的,并建立了与同一基础相连的一组桩在水平地基位移和惯性力共同作用下的解析模型,计算了桩的应力和位移。计算的破坏和变形模式与现场观测结果吻合较好,验证了所提出的分析模型可以有效地用于估算土体液化过程中桩体内的应力。
项目成果
期刊论文数量(24)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
時松孝次: "Building Damage Associated with Geotechnical Problems" 地盤工学会論文報告集(special Issue). 219-234 (1996)
Koji Tokimatsu:“与岩土工程问题相关的建筑物损坏”日本岩土工程学会特刊 219-234 (1996)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Kohji Tokimatsu: "Building Damage Associated with Ground and foundation Problems" Tsuchi-to-kiso. Vol.44, No.2. 14-18 (1996)
Kohji Tokimatsu:“与地面和地基问题相关的建筑物损坏”Tschi-to kiso。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Shinji Mihara: "Centrifuge Model Testing of Soil-Pile-Structure Interaction" Proc., of the The30 Japan National Conference on Geotechnical Engineering. 1087-1088 (1995)
Shinji Mihara:“土-桩-结构相互作用的离心模型测试”Proc.,第 30 届日本岩土工程全国会议。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Kohji Tokimatsu: "Methods for Evaluating soil liquefaction potential and actual field performance" The Foundation Engineering and Equipment. Vol.24, No.11. 36-41 (1996)
Kohji Tokimatsu:“评估土壤液化潜力和实际现场性能的方法”基础工程和设备。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
時松孝次: "液状化・側方流動による地盤変形を考慮した杭の変形と応力" 第32回地盤工学研究発表会. (発表予定). (1997)
Koji Tokimatsu:“考虑液化和横向流动引起的地面变形的桩变形和应力”第 32 届岩土工程研究会议(预定报告)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
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TOKIMATSU Kohji其他文献
TOKIMATSU Kohji的其他文献
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{{ truncateString('TOKIMATSU Kohji', 18)}}的其他基金
Effects of non-linear response and failure of the ground subjected to strong shaking on soils and structures and their implementation into performance based design
强烈震动下的地面非线性响应和破坏对土壤和结构的影响及其在基于性能的设计中的实施
- 批准号:
20246089 - 财政年份:2008
- 资助金额:
$ 3.2万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Possibility of response control of foundation-superstructure system considering dynamic soil-structure interaction during strong earthquakes
强震期间考虑动力土-结构相互作用的地基-上部结构系统响应控制的可能性
- 批准号:
17360265 - 财政年份:2005
- 资助金额:
$ 3.2万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Evaluation of Ultimate Strength and Deformation Capacity of Pile Foundations Considering Soil-Structure Interaction during Strong Earthquakes
强震时考虑土-结构相互作用的桩基极限强度和变形能力评价
- 批准号:
14350297 - 财政年份:2002
- 资助金额:
$ 3.2万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
DEVELOPMENT OF SYSTEM FOR EVAUATING SEISMIC GROUDA MOTION AND HAZARD IN IRREGULARLY STRATEFIED LAYER BASED ON MICROTREMOR MEASUREMENTS
基于微动测量的不规则地层地震格鲁达运动和灾害评估系统的开发
- 批准号:
12555158 - 财政年份:2000
- 资助金额:
$ 3.2万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
VALUATION OF EARTH PRESSURES ACTING ON FOUNDATIONS DURING STRONG
强震期间作用于地基的土压力的评估
- 批准号:
11450203 - 财政年份:1999
- 资助金额:
$ 3.2万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
DEVELOPMENT OF SHEAR WAVE VELOCITY EXPLORATION SYSTEM BASED ON MICROTREMOR MEASUREMENTS AND IT'S APPLICATION TO SITE CHARACTERISTCS
基于微动测量的剪切波速度探测系统开发及其在场地特征中的应用
- 批准号:
10555197 - 财政年份:1998
- 资助金额:
$ 3.2万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
VALUATION OF EARTH PRESSURES ACTING ON FOUNDATIONS DURING STRONG
强震期间作用于地基的土压力的评估
- 批准号:
09450202 - 财政年份:1997
- 资助金额:
$ 3.2万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
DEVELOPMENT OF REAL-TIME GEOPHYSICAL EXPLORATION SYSTEM BASED ON ARRAY OBSERVATION OF THREE-COMPONENT MICROTREMORS
基于三分量微震阵列观测的实时地球物理勘探系统开发
- 批准号:
08555140 - 财政年份:1996
- 资助金额:
$ 3.2万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
DEVELOPMENT OF GEOPHYSICAL EXPLORATION SYSTEM BASED ON ARRAY OBSERVATION OF MICROTREMORS
基于微震阵列观测的地球物理勘探系统开发
- 批准号:
06555169 - 财政年份:1994
- 资助金额:
$ 3.2万 - 项目类别:
Grant-in-Aid for Developmental Scientific Research (B)
Development of a simplified geophysical exploration system for seismic hazard evaluations
开发用于地震危险性评估的简化地球物理勘探系统
- 批准号:
02555125 - 财政年份:1990
- 资助金额:
$ 3.2万 - 项目类别:
Grant-in-Aid for Developmental Scientific Research (B)
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