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Shaking table test on a tunnel-group metro station in rock site under harmonic excitation

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FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING 2024年第9期18卷 1362-1377页

作者： Li, Ruozhou He, Weiguo yao, xupeng Li, Qingfei Zhang, Dingli Yuan, Yong Tongji Univ Dept Geotech Engn Shanghai 200092 Peoples R China China Railway Liuyuan Grp Co Ltd Tianjin 300308 Peoples R China Beijing Jiaotong Univ Key Lab Urban Underground Engn Minist Educ Beijing 100044 Peoples R China

A tunnel-group metro station built in rock site is composed of a group of tunnels. Different tunnels and their interconnections can show inconsistent responses during an earthquake. This study investigates the dynamic responses of such a metro station in a rock site, by shaking table tests. The lining structures of each tunnel and surrounding rock are modeled based on the similitude law; foam concrete and gypsum are used to model the ground-structure system, keeping relative stiffness consistent with that of the prototype. A series of harmonic waves are employed as excitations, input along the transverse and longitudinal direction of the shaking table. The discrepant responses caused by the structural irregularities are revealed by measurement of acceleration and strain of the model. Site characteristics are identified by the transfer function method in white noise cases. The test results show that the acceleration response and strain response of the structure are controlled by the ground. In particular, the acceleration amplification effect at the opening section of the station hall is more significant than that at the standard section under transverse excitation; the amplification effect of the structural opening is insignificant under longitudinal excitation.

关键词： metro station tunnel-group shaking table test harmonic excitation dynamic response SEISMIC DAMAGE ASSESSMENT MOUNTAIN TUNNELS MECHANISM SOIL

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地铁隧道渗漏水病害快速检测及图像处理技术

城市轨道交通研究 2017年第12期20卷 46-49页

作者：姚旭朋同济大学国家土建结构预制装配化工程技术研究中心上海高级工程师200092

检测盾构隧道渗漏水的传统人工检测方法工效低,无法满足大量运营地铁隧道快速检测的需求。隧道渗漏水快速检测系统包括快速摄像设备及与之配套的图像分析处理器。快速摄像设备是基于工业定焦相机和自动化控制技术集成开发的,可实现对地... 详细信息

检测盾构隧道渗漏水的传统人工检测方法工效低,无法满足大量运营地铁隧道快速检测的需求。隧道渗漏水快速检测系统包括快速摄像设备及与之配套的图像分析处理器。快速摄像设备是基于工业定焦相机和自动化控制技术集成开发的,可实现对地铁隧道渗漏水病害的快速摄像。与快速摄像系统配套的图像分析与数据处理器,是根据地铁隧道结构宏观特征和结构构件空间几何关系开发的,能实现病害特征的快速计算,并对病害进行分类。该隧道渗漏水快速检测系统在上海地铁中的应用效果良好,现场摄像速度达5km/h,渗漏水病害检测准确率达到95%。

关键词：地铁隧道渗漏水病害快速检测图像分析

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既有隧道结构混凝土材料性能研究

材料导报 2008年第10期22卷 144-145,149页

作者：姚旭朋袁勇翁其能同济大学土木工程学院上海200092 重庆交通大学岩土工程研究所重庆400074

混凝土材料性能劣化是当前隧道结构维护中面临的主要问题,从既有隧道结构维护的角度出发,总结归纳了混凝土碳化和氯离子侵蚀这两种能够影响混凝土材料性能的关键因素的作用机理,并依据工程实践过程,给出了既有隧道结构中混凝土材料性能... 详细信息

混凝土材料性能劣化是当前隧道结构维护中面临的主要问题,从既有隧道结构维护的角度出发,总结归纳了混凝土碳化和氯离子侵蚀这两种能够影响混凝土材料性能的关键因素的作用机理,并依据工程实践过程,给出了既有隧道结构中混凝土材料性能的鉴定方法。

关键词：混凝土材料碳化作用性能鉴定既有隧道

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复合地层双线地铁隧道施工地表沉降规律研究

地下空间与工程学报 2020年第S2期16卷 762-768,789页

作者：范雨苏艺袁勇姚旭朋广州地铁集团有限公司广州510330 同济大学地下建筑与工程系上海200092

为提高地下空间利用率与施工效率,双线盾构隧道已广泛应用于城市地铁建设中。本文依托广州地铁某区段双线盾构隧道施工的工程背景,建立地层隧道三维弹塑性有限元模型进行施工过程数值模拟,并通过实测地表沉降数据验证计算结果;进而采用... 详细信息

为提高地下空间利用率与施工效率,双线盾构隧道已广泛应用于城市地铁建设中。本文依托广州地铁某区段双线盾构隧道施工的工程背景,建立地层隧道三维弹塑性有限元模型进行施工过程数值模拟,并通过实测地表沉降数据验证计算结果;进而采用数值模拟研究上部软土下部灰岩复合地层中,双线隧道开挖过程中地表沉降的变化规律,分析双线隧道施工时两者之间的相互影响机制,基于叠加原理推导了双线隧道相对间距系数,结果表明通过该相对间距系数可判别地表沉降曲线形状,预测性分析两条隧道施工相互扰动影响程度,为广州地区软土灰岩复合地层双线盾构隧道施工的沉降监测与沉降控制提供了参考依据。

关键词：复合地层双线盾构隧道相对间距系数沉降

THE LIVING ENVIRONMENT AND MAINTENANCE THEORY OF TUNNEL

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THE LIVING ENVIRONMENT AND MAINTENANCE THEORY OF TUNNEL

Mechanically strong porous bioceramic tubes facilitate large segmental bone defect repair by providing long-term structurally stability and promoting osteogenesis

首届地下工程服务寿命国际专题研讨会

作者： yao xupeng YUAN Yong WENG Qineng LIU Xian (Department of Civil Engineering Tongji University 1239 Siping Road Shanghai 200092 China)

＜正＞In the beginning,the complex living environment of tunnel is illustrated and they indicate the difficulty in tunnel *** the security of tunnel is seriously threatened by the complex living environment,the research about tunnel maintenance theory never stopped and attained many positive *** the development of science and technology,many new techniques are used and provide enormous help in the process of tunnel *** the light of the fruits about tunnel maintenance earlier and the experience from other fields,the systematic maintenance is proposed and it is based on this consideration the life-cycle maintenance strategies are suggested.

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Engineered Regeneration 2024年第1期5卷 1-10页

作者： Lijun Xie Jiahao Zhang Hangxiang Sun Zehao Chen Wangsiyuan Teng xupeng Chai Cong Wang Xianyan Yang Yifan Li Sanzhong Xu Zhongru Gou Zhaoming Ye Department of Orthopedic Surgery the Second Affiliated HospitalZhejiang University School of MedicineHangzhou 310000PR China Orthopedics Research Institute of Zhejiang University Hangzhou 310000PR China Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province Hangzhou 310000PR China Bio-nanomaterials and Regenerative Medicine Research Division Zhejiang-California International Nanosystem InstituteZhejiang UniversityHangzhou 310058PR China Department of Orthopedics the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003PR China

Mechanically strong magnesium-doped Ca-silicate bioceramic scaffolds have many advantages in repairing large segmental bone *** we combine β-TCP with 6 mol%magnesium-doped calcium silicate(Mg6)at three different ratios(TCP,TCP+15%Mg6,TCP+85%Mg6)to find an appropriate ratio which can exert considerable influence on bone *** this study,the bioceramic scaffolds were assessed for mechanical strength,bioactive ion release,biocompatibility,and osteogenic capacity through in vitro ***,the potential for promoting bone regeneration was investigated through in vivo implantation of porous tube-like *** results showed that the compressive strength increased with the augmentation of Mg6 *** the compressive strength of the TCP+85%Mg6 group reached 38.1±3.8 MPa,three times that of the other two ***,extensive in vivo investigations revealed that the TCP+85%Mg6 bioceramic scaffolds were particularly beneficial for the osteogenic capacity of critical-sized femoral defects(20 mm in length).Altogether,magnesium doping in bioceramic implants is a promising strategy to provide stronger mechanical support and enhance osteogenesis to accelerate the repair of large defects.

关键词： Bioceramic tubes Mg-doped calcium silicate Porous structural stability Large segmental bone defects Digital light processing

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基于CVISC模型的深埋圆硐黏弹塑性解

隧道建设（中英文） 2023年第S1期43卷 145-153页

作者：鲁义强史博然贺飞袁勇姚旭朋张姣龙中铁工程装备集团河南郑州450000 同济大学土木工程学院上海200092

为解决高地应力围岩挤压型大变形问题,根据以往挤压型大变形隧道案例,选取适用于泥岩、砂岩、粉质砂岩等各向同性软岩,利用Burgers模型和M-C塑性体串联形成的CVISC黏弹塑性模型,结合CVISC模型黏弹性元件和弹塑性元件相互独立的特性,将... 详细信息

为解决高地应力围岩挤压型大变形问题,根据以往挤压型大变形隧道案例,选取适用于泥岩、砂岩、粉质砂岩等各向同性软岩,利用Burgers模型和M-C塑性体串联形成的CVISC黏弹塑性模型,结合CVISC模型黏弹性元件和弹塑性元件相互独立的特性,将围岩径向位移分为瞬时弹塑性阶段位移和黏弹性阶段位移,分别推导塑性区和黏弹性区径向位移解析解,叠加组合形成围岩位移分布解析解,分析围岩径向位移场、应力场随时间变化规律,全面描述硐室变形规律。借助FLAC3D和相关文献理论解答验证其适用性,在此基础上进行长期变形的参数敏感性分析,结果表明各阶段最关键的3个参数分别是内摩擦角、黏聚力和弹性模量,蠕变参数仅在其控制阶段具有显著敏感度。

关键词：岩石隧道挤压型大变形黏弹塑性解析有限差分法

Clinical significance,molecular characterization,and immune microenvironment analysis of coagulation-related genes in clear cell renal cell carcinoma

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Cancer Innovation 2024年第1期3卷 29-49页

作者： Weihao Chen xupeng Zhao Yongliang Lu Hanfeng Wang Xiyou Wang Yi Wang Chen Liang Zhuomin Jia Wei Ma Department of Urology The Third Medical Center of PLA General HospitalBeijingChina School of Medicine Nankai UniversityTianjinChina Medical Service Department The PLA General HospitalBeijingChina Senior Department of Otolaryngology-Head&Neck Surgery The Sixth Medical Center of PLA General HospitalBeijingChina

Background:Numerous studies have revealed a tight connection between tumor development and the coagulation ***,the effects of coagulation on the prognosis and tumor microenvironment(TME)of clear cell renal cell carcinoma(ccRCC)remain poorly ***:We employed the consensus clustering method to characterize distinct molecular subtypes associated with coagulation ***quently,we examined variations in the overall survival(OS),genomic profiles,and TME characteristics between these *** develop a prognostic coagulation-related risk score(CRRS)model,we utilized the least absolute shrinkage and selection operator Cox regression and stepwise multivariate Cox regression *** also created a nomogram to aid in the clinical application of the risk score,evaluating the relationships between the CRRS and the immune microenvironment,responsiveness to immunotherapy,and targeted *** clinical significance of PLAUR and its biological function in ccRCC were also further ***:There were significant differences in clinical features,prognostic stratification,genomic variation,and TME characteristics between the two coagulation-related *** established and validated a CRRS using six coagulation-related genes that can be employed as an effective indicator of risk stratification and prognosis estimation for ccRCC *** variations in survival outcomes were observed between the high-and low-risk *** nomogram was proficient in predicting the 1-,3-,and 5-year ***,the CRRS emerged as a novel tool for evaluating the clinical effectiveness of immunotherapy and targeted treatments in ***,we confirmed upregulated PLAUR expression in ccRCC samples that was significantly correlated with poor patient *** knockdown notably inhibited ccRCC cell proliferation and ***:Our data suggested that CRRS may be employed as a reliable predictive biomarker that can pro

关键词： clear cell renal cell carcinoma coagulation immunotherapy risk score tumor immune microenvironment

混凝土早期收缩徐变作用下的超长支撑轴力分析

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建筑施工 2011年第5期33卷 359-361页

作者：朱毅敏姚旭朋上海市第一建筑有限公司 200120 同济大学 200092

在基坑施工过程中,若钢筋混凝土支撑过长或超长,混凝土材料本身固有的收缩和徐变特性就会充分发挥出来,影响其支撑的效果。经过分析与研究,提出了超长支撑的受力模型,并在实际工程中进行了现场监测。工程应用结果证明了该受力模型的理... 详细信息

在基坑施工过程中,若钢筋混凝土支撑过长或超长,混凝土材料本身固有的收缩和徐变特性就会充分发挥出来,影响其支撑的效果。经过分析与研究,提出了超长支撑的受力模型,并在实际工程中进行了现场监测。工程应用结果证明了该受力模型的理论分析是正确可行的。

关键词：超长支撑轴力混凝土早龄期收缩徐变