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Earthquake Engineering and Engineering Vibration 2024年第1期23卷 163-178页

作者： wu houli Guo Endong Wang Jingyi Dai Xin Dai Chenxi Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationHarbin 150080China Key Laboratory of Earthquake Disaster Mitigation Ministry of Emergency ManagementHarbin 150080China

As an important part of nonstructural components,the seismic response of indoor water supply pipes deserves much *** paper presents shaking table test research on water supply pipes installed in a full-scale reinforced concrete(RC)frame *** material pipes and different methods for penetrating the reinforced concrete floors are combined to evaluate the difference in seismic *** response spectra and pipe acceleration amplification factors based on test data are discussed and compared with code provisions.A seismic fragility study of displacement demand is conducted based on numerical *** acceleration response and displacement response of different combinations are *** results show that the combination of different pipe materials and different passing-through methods can cause obvious differences in the seismic response of indoor riser pipes.

关键词： water supply pipe different materials shaking table test amplification factor seismic fragility

不同频谱特性地震动对高速铁路桥梁-轨道震后残余变形影响分析

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地震研究 2024年第1期47卷 27-36页

作者：甘霖郭恩栋吴厚礼李长宏刘聪中国地震局工程力学研究所地震工程与工程振动重点实验室黑龙江哈尔滨150080 地震灾害防治应急管理部重点实验室黑龙江哈尔滨150080

以一座典型高速铁路五跨简支梁桥为例,建立了精细化高速铁路桥梁-轨道系统有限元模型。针对不同类型频谱特性选取了近场脉冲型、近场无脉冲型、远场长周期型和普通型地震动。输入不同频谱特性的地震动,对结构进行非线性时程响应分析,探... 详细信息

以一座典型高速铁路五跨简支梁桥为例,建立了精细化高速铁路桥梁-轨道系统有限元模型。针对不同类型频谱特性选取了近场脉冲型、近场无脉冲型、远场长周期型和普通型地震动。输入不同频谱特性的地震动,对结构进行非线性时程响应分析,探究不同频谱特性地震动对轨道残余变形的影响规律及变形特点。结果表明:不同类型地震动对轨道残余变形的影响程度不同,轨道结构对近场脉冲型地震动的作用最为敏感;不同类型地震动作用下,轨道横向残余变形规律相似,均表现为全桥中间部分变形最大;每跨桥梁跨中竖向残余变形远大于桥墩(桥台)位置竖向残余变形;梁缝位置为轨道薄弱部分,轨距残余变形在每跨桥梁梁体连接处有明显尖刺状的突变。当PGA>0.2 g时,不同类型地震动作用下的轨道变形均随着PGA的增大而增大;当PGA=0.38 g时,桥梁已经进入塑性状态,地震动类型对于轨道残余变形的影响程度降低。

关键词：高速铁路桥梁-轨道残余变形频谱特性非线性时程分析

Dynamic-Response Analysis of the Branch System of a Utility Tunnel Subjected to Near-Fault and Far-Field Ground Motions in Different Input Mechanisms

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Computer Modeling in Engineering & Sciences 2022年第1期130卷 167-186页

作者： Yuhang Jin Endong Guo houli wu Peilei Yan Institute of Engineering Mechanics China Earthquake AdministrationHarbin150080China Key Laboratory of Earthquake Engineering and Engineering Vibration Harbin150080China

There are few studies on the dynamic-response mechanism of near-fault and far-field ground motions for large underground structures,especially for the branch joint of a utility tunnel(UT)and its internal *** on the theory of a 3D viscous-spring artificial boundary,this paper deduced the equivalent nodal force when a P wave and an SV wave were vertically incident at the same time and transformed the ground motion into an equivalent nodal force using a self-developed MATLAB program,which was applied to an ABAQUS finite element *** on near-fault and far-field groundmotions obtained fromtheNGA-WEST2 database,the dynamic responses of a utility tunnel and its internal pipeline in different inputmechanisms of near-fault and far-field groundmotions were compared according to bidirectional input and tridirectional input,***,the damage to the utility tunnel caused by the near-fault ground motion was stronger than that caused by the far-field ground motion,and the vertical ground motion of near-fault ground motion aggravated the damage to the utility *** addition,the joint dislocation of the upper and lower three-way joints of the pipeline in the branch systemunder the seismic action led to local stress *** general,the branch system of the utility tunnel had good seismic performance to resist the designed earthquake action and protect the internal pipeline fromdamage during the rare earthquake.

关键词： Dynamic response utility tunnel near-fault ground motion far-field ground motion earthquake input seismic design

基于脉动法的上海市RC剪力墙结构基本自振周期测试与分析

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振动与冲击 2021年第17期40卷 146-151,188页

作者：闫培雷郭恩栋吴厚礼金宇航中国地震局工程力学研究所中国地震局地震工程与工程震动重点实验室哈尔滨150080

针对我国现行规范中剪力墙结构的基本自振周期经验公式是基于高度在50 m以下的建筑实测数据拟合而成的现状,基于脉动法对上海市已建成的总高度在45~90 m之间的62栋RC剪力墙结构进行了现场动力性能测试,识别了结构在水平纵向与横向的基... 详细信息

针对我国现行规范中剪力墙结构的基本自振周期经验公式是基于高度在50 m以下的建筑实测数据拟合而成的现状,基于脉动法对上海市已建成的总高度在45~90 m之间的62栋RC剪力墙结构进行了现场动力性能测试,识别了结构在水平纵向与横向的基本自振周期。采用其中60栋结构的数据进行了回归分析,分别给出了基于结构高宽比和“幂次高度系数”的水平纵横两个方向上基本自振周期回归公式;并采用其中2栋结构的测试数据验证了经验公式的准确性。研究表明:结构总高度对RC剪力墙结构的基本自振周期的影响最为显著;采用“幂次高度系数”的经验公式的拟合效果优于基于结构高宽比的经验公式。

关键词：高层建筑剪力墙结构自振周期脉动测试回归分析

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城市地下管网地震灾害情景可视化方法研究

自然灾害学报 2021年第4期30卷 102-109页

作者：孙思男郭恩栋吴厚礼顾嘉宁中国地震局工程力学研究所中国地震局地震工程与工程振动重点实验室黑龙江哈尔滨150080

地震灾害情景构建研究对直观展示整个地下管网的灾害情景和薄弱环节具现实意义,是防灾减灾工作的重要组成部分。为了提升大中城市地下管网地震灾害情景的三维可视化效果,研究了基于VTK函数库和Python语言利用地下管网空间位置数据及管... 详细信息

地震灾害情景构建研究对直观展示整个地下管网的灾害情景和薄弱环节具现实意义,是防灾减灾工作的重要组成部分。为了提升大中城市地下管网地震灾害情景的三维可视化效果,研究了基于VTK函数库和Python语言利用地下管网空间位置数据及管线表面的TIN表达算法,实现了外部数据转换、城市大规模三维管网模型建立及地震反应动态可视化。并运用该方法开展了广东省某城市地下管网的震害仿真模拟,展示了该研究方法的可视化效果,对城市地下管网的抗震薄弱环节判断、地震破坏状态和抗震性能评估等工作均具参考价值。

关键词：管网建模震害预测 VTK 三维可视化地震灾害情景模拟

东北地区城市供水管网分类地震易损性初步研究

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自然灾害学报 2023年第5期32卷 80-89页

作者：代鑫郭恩栋吴厚礼王晓娜中国地震局工程力学研究所地震工程与工程振动重点实验室黑龙江哈尔滨150080 地震灾害防治应急管理部重点实验室黑龙江哈尔滨150080

供水管网是城市生命线工程的重要组成部分,大区域城市供水管网地震灾害风险评估是进行区域地震灾害风险区划及对策制定的重要基础性工作之一。目前,国内学者针对我国供水管网给出了不同材质管道的地震易损性模型,但尚未对不同区域城市... 详细信息

供水管网是城市生命线工程的重要组成部分,大区域城市供水管网地震灾害风险评估是进行区域地震灾害风险区划及对策制定的重要基础性工作之一。目前,国内学者针对我国供水管网给出了不同材质管道的地震易损性模型,但尚未对不同区域城市的供水管网整体进行分区分类的地震易损性研究,限制了大区域供水管网地震灾害风险评估工作的顺利实施。基于这一研究现状,利用东北地区部分城市管网结构组成及规模基础资料,结合不同材质管道的地震易损性,对东北地区城市管网综合抗震能力进行分类,建立了5个不同抗震能力类别城市供水管网的地震易损性模型,为缺少基础数据支持城市的供水管网地震灾害风险评估提供了参考地震易损性模型。

关键词：供水管道供水管网城市分类易损性

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城市供水管网抗震能力评价研究

世界地震工程 2023年第1期39卷 127-135页

作者：顾嘉宁郭恩栋孙思男吴厚礼王晓娜中国地震局工程力学研究所地震工程与工程振动重点实验室黑龙江哈尔滨150080 地震灾害防治应急管理部重点实验室黑龙江哈尔滨150080

供水管网是城市重要的基础设施,为了高效合理地评估现有供水管网的抗震能力,本文从结构安全性角度出发,构建了供水管网综合抗震能力评价指标体系和供水管网综合抗震能力评价模型。综合分析管道各项指标,运用主成分分析法得到指标权重并... 详细信息

供水管网是城市重要的基础设施,为了高效合理地评估现有供水管网的抗震能力,本文从结构安全性角度出发,构建了供水管网综合抗震能力评价指标体系和供水管网综合抗震能力评价模型。综合分析管道各项指标,运用主成分分析法得到指标权重并建立供水管道抗震能力模型,基于图论理论构建了供水管网基础抗震能力评价模型。从物理、社会和时间效应三个维度出发,将管网基础抗震能力通过环境评价修正系数进行修正,构建了精细化的供水管网综合抗震能力评价模型,以此表征管网的易损性,为地震灾害风险评估工作提供支持。通过对深圳市供水管网进行抗震能力评价,将结果与传统震害预测结果对比,说明了评价模型的合理性。

关键词：供水管网抗震能力评价指标评价模型

Ballistic performances of the hourglass lattice sandwich structures under high-velocity fragments

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Defence Technology（防务技术） 2024年第1期31卷 312-325页

作者： He-xiang wu Jia Qu Lin-zhi wu Key Laboratory of Advanced Ship Materials and Mechanics College of Aerospace and Civil EngineeringHarbin Engineering UniversityHarbin150001China School of Civil Engineering Northeast Forestry UniversityHarbin150040China

In this paper,the numerical simulation method is used to study the ballistic performances of hourglass lattice sandwich structures with the same mass under the vertical incidence of *** is paid to elucidating the influences of rod cross-section dimensions,structure height,structure layer,and rod inclination angle on the deformation mode,ballistic performances,and ability to change the ballistic direction of *** results show that the ballistic performances of hourglass lattice sandwich structures are mainly affected by their structural *** this respect,structural parameters optimization of the hourglass lattice sandwich structures enable one to effectively improve their ballistic limit velocity and,consequently,ballistic performances.

关键词： Hourglass lattice sandwich structures Ballistic performances high-velocity Finite element analysis

Resilience-incorporated seismic risk assessment of precast concrete frames with“dry”connections

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Earthquake Engineering and Engineering Vibration 2024年第2期23卷 403-425页

作者： wu Chenhao Tang Yuchuan Cao Xuyang wu Gang Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education Nanjing 211102China Department of Civil and Environmental Engineering University of CaliforniaLos AngelesCA 90095USA School of Civil Engineering Southeast UniversityNanjing 211102China College of Civil and Transportation Engineering Hohai UniversityNanjing 210024China

A resilience-incorporated risk assessment framework is proposed and demonstrated in this study to manifest the advantageous seismic resilience of precast concrete frame(PCF)structures with“dry”connections in terms of their low damage and rapid *** framework integrates various uncertainties in the seismic hazard,fragility,capacity,demand,loss functions,and post-earthquake *** this study,the PCF structures are distinguished from ordinary reinforced concrete frame(RCF)structures by characterizing multiple limit states for the PCF based on its unique damage ***,probabilistic story-wise pushover analyses are performed to yield story-wise capacities for the predefined limit *** the seismic resilience analysis,a step-wise recovery model is proposed to idealize the functionality recovery process,with separate considerations of the repair and non-repair *** recovery model leverages the economic loss and downtime to delineate the stochastic post-earthquake recovery curves for the resilience loss *** such,contingencies in the probabilistic post-earthquake repairs are incorporated and the empirical judgments on the recovery parameters are largely *** proposed framework is demonstrated through a comparative study between two“dry”connected PCFs and one RCF designed as alternative structural systems for a prototype *** results from the risk quantification indicate that the PCFs show reduced loss hazards and lower expected losses relative to the ***,the PCF equipped with energy dissipation devices at the“dry”connections largely reduces the expected economic loss,downtime,and resilience loss by 29%,56%,and 60%,respectively,compared to the RCF.

关键词： precast concrete frame non-emulative precast system seismic resilience seismic risk functional recovery

New findings on the influence of El Nino events on tropical cyclone formation

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Science China Earth Sciences 2024年第3期67卷 892-893页

作者： Liguang wu Department of Atmospheric and Oceanic Sciences Institute of Atmospheric SciencesFudan UniversityShanghai 200438China

Tropical cyclones typically form over warm tropical and subtropical ocean surfaces, as their formation and intensification rely primarily on the energy provided by the ocean. Pioneering research by Gray (1968) revealed that the formation of tropical cyclones requires the sea surface temperature (SST) to be no less than 26.5℃. Consequently, SST is commonly recognized as a crucial parameter among the environmental factors influencing tropical cyclone formation(Gray, 1979;Emanuel and Nolan, 2004).

关键词： tropical cyclone ocean