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Large-scale model test study on the water pressure resistance of construction joints of karst tunnel
《结构与土木工程前沿(英文)》 页码 1249-1263 doi: 10.1007/s11709-023-0974-x
关键词: karst tunnel lining construction joint water pressure resistance large-scale model test numerical calculations
温德华
《中国工程科学》 2012年 第14卷 第2期 页码 80-84
采用井筒内外井壁现场埋设传感器的方法,建立由计算机控制的自动监测系统,实测大屯矿区某混合井井壁施工过程及之后一段时间的受力和变形演变规律。对实测结果进行分析,研究内外井壁的综合变形规律,可以预测井壁的长期安全性,为井壁破裂的预防和治理提供科学决策的依据。
何川,封坤,晏启祥,齐春
《中国工程科学》 2012年 第14卷 第10期 页码 65-72
针对我国第一条水下铁路盾构法隧道——狮子洋隧道,采用“多功能盾构隧道结构体试验系统”装置原型管片衬砌结构,在通缝和错缝不同的拼装方式下进行了原型结构加载试验,对其结构力学性能进行深入探讨。试验结果表明,不同水压条件下管片衬砌结构力学特征不同,尤其是当结构开裂后,高水压对于结构内力与形变的发展有明显的减缓作用。狮子洋隧道采用的榫式接头管片结构在通缝与错缝拼装下的破坏特征不同,通缝拼装时结构在高水压条件下纵缝附近区域易发生局部剪切破坏,该研究成果可为同类工程的设计提供有价值的参考。
赵振宇,殷音
《中国工程科学》 2008年 第10卷 第9期 页码 84-87
讨论了工程承包联营体环境动荡性评价指标和工程承包联营体柔性评价指标以及相应的评价方法。通过柔性分析,可以判断出工程承包联营体各方面的柔性程度能否与其相应的环境和内外部因素相适应,并为制订调整联营体柔性度的措施提供帮助,进而提高联营体的管理水平和竞争力。
Damage on lining concrete in highway tunnels under combined sulfate and chloride attack
Rongrong YIN, Chenchen ZHANG, Qing WU, Baocheng LI, He XIE
《结构与土木工程前沿(英文)》 2018年 第12卷 第3期 页码 331-340 doi: 10.1007/s11709-017-0421-y
The combined effect from sulfate and chloride is one of the important reasons to cause the damage of lining concrete in highway tunnels. To investigate the effect of chloride ions on the corrosion of lining concretes under sulfate attack, ultrasonic detecting, compression test and X-ray Diffraction (XRD) were performed on the concretes to obtain the ultrasonic velocity, corrosion thickness, compression strength and corrosion products. The ultrasonic results, compression strength and XRD patterns confirmed that the existence of chloride certainly depressed the corrosion damage on the lining concretes under sulfate attack, and the depressing effect increased with the content of chloride in the composite solution. The corrosion damage on the concretes experienced three stages independent of the composition of corrosive solution: initial slower enhancement on the strength, stabilization period and linear degradation period. The existence of chloride mainly affected the final degradation stage and obviously decreased the corrosion thickness.
关键词: lining concrete sulfate chloride compression ultrasonic
《结构与土木工程前沿(英文)》 页码 901-914 doi: 10.1007/s11709-023-0915-8
关键词: shield tunnel segment joint joint structural model failure mechanism
Deep convolutional neural network for multi-level non-invasive tunnel lining assessment
《结构与土木工程前沿(英文)》 2022年 第16卷 第2期 页码 214-223 doi: 10.1007/s11709-021-0800-2
关键词: concrete structure GPR damage classification convolutional neural network transfer learning
Nazim Abdul NARIMAN, Ayad Mohammad RAMADAN, Ilham Ibrahim MOHAMMAD
《结构与土木工程前沿(英文)》 2019年 第13卷 第6期 页码 1495-1509 doi: 10.1007/s11709-019-0574-y
关键词: ovaling deformation monte carlo sampling XFEM-BCQO maximum principal stress
Digital microfluidics: A promising technique for biochemical applications
He WANG, Liguo CHEN, Lining SUN
《机械工程前沿(英文)》 2017年 第12卷 第4期 页码 510-525 doi: 10.1007/s11465-017-0460-z
Digital microfluidics (DMF) is a versatile microfluidics technology that has significant application potential in the areas of automation and miniaturization. In DMF, discrete droplets containing samples and reagents are controlled to implement a series of operations via electrowetting-on-dielectric. This process works by applying electrical potentials to an array of electrodes coated with a hydrophobic dielectric layer. Unlike microchannels, DMF facilitates precise control over multiple reaction processes without using complex pump, microvalve, and tubing networks. DMF also presents other distinct features, such as portability, less sample consumption, shorter chemical reaction time, flexibility, and easier combination with other technology types. Due to its unique advantages, DMF has been applied to a broad range of fields (e.g., chemistry, biology, medicine, and environment). This study reviews the basic principles of droplet actuation, configuration design, and fabrication of the DMF device, as well as discusses the latest progress in DMF from the biochemistry perspective.
关键词: digital microfluidics electrowetting on dielectric discrete droplet biochemistry
Yunlin LIU, Shitao ZHU
《结构与土木工程前沿(英文)》 2019年 第13卷 第5期 页码 1095-1104 doi: 10.1007/s11709-019-0538-2
关键词: PCS concrete side joint numerical simulation fiber-beam element joint model solid element joint model seismic behavior
杨昀,张和平,刘激扬
《中国工程科学》 2003年 第5卷 第4期 页码 55-60
标准房间/墙角火实验是一种全尺度火灾实验研究方法,主要用来研究室内装饰材料的火灾特性。介绍了ISO 9705房间/墙角火实验方法的原理和实验装置,以及国内外利用该方法对装饰材料火灾特性进行研究的进展情况,包括对材料热释放速率、烟气产生和室内火蔓延方面的研究。分析了其研究成果在室内装饰材料的分类及火灾危险性评估中的实际应用情况,并结合作者目前的工作对未来的研究内容做了一些展望。
Precast steel–UHPC lightweight composite bridge for accelerated bridge construction
Shuwen DENG, Xudong SHAO, Xudong ZHAO, Yang WANG, Yan WANG
《结构与土木工程前沿(英文)》 2021年 第15卷 第2期 页码 364-377 doi: 10.1007/s11709-021-0702-3
关键词: accelerated bridge construction ultrahigh-performance concrete steel–UHPC composite bridge UHPC girder-to-girder joint
Dynamic characteristics of a magnetorheological pin joint for civil structures
Yancheng LI,Jianchun LI
《机械工程前沿(英文)》 2014年 第9卷 第1期 页码 15-33 doi: 10.1007/s11465-014-0283-0
Magnetorheological (MR) pin joint is a novel device in which its joint moment resistance can be controlled in real-time by altering the applied magnetic field. The smart pin joint is intended to be used as a controllable connector between the columns and beams of a civil structure to instantaneously shift the structural natural frequencies in order to avoid resonance and therefore to reduce unwanted vibrations and hence prevent structural damage. As an intrinsically nonlinear device, modelling of this MR fluid based device is a challenging task and makes the design of a suitable control algorithm a cumbersome situation. Aimed at its application in civil structure, the main purpose of this paper is to test and characterise the hysteretic behaviour of MR pin joint. A test scheme is designed to obtain the dynamic performance of MR pin joint in the dominant earthquake frequency range. Some unique phenomena different from those of MR damper are observed through the experimental testing. A computationally-efficient model is proposed by introducing a hyperbolic element to accurately reproduce its dynamic behaviour and to further facilitate the design of a suitable control algorithm. Comprehensive investigations on the model accuracy and dependences of the proposed model on loading condition (frequency and amplitude) and input current level are reported in the last section of this paper.
关键词: Magnetorheological pin joint hyperbolic hysteresis model experimental testing frequency dependence
基于人体髋关节转动中心分析的髋关节外骨骼仿生设计 Article
Wei YANG,Can-jun YANG,Ting XU
《信息与电子工程前沿(英文)》 2016年 第17卷 第8期 页码 792-802 doi: 10.1631/FITEE.1500286
Identification of dynamic stiffness matrix of bearing joint region
Feng HU, Bo WU, Youmin HU, Tielin SHI
《机械工程前沿(英文)》 2009年 第4卷 第3期 页码 289-299 doi: 10.1007/s11465-009-0064-3
关键词: frequency response function (FRFs) dynamic stiffness finite element synthetic substructure method joint region
标题 作者 时间 类型 操作
Large-scale model test study on the water pressure resistance of construction joints of karst tunnel
期刊论文
Damage on lining concrete in highway tunnels under combined sulfate and chloride attack
Rongrong YIN, Chenchen ZHANG, Qing WU, Baocheng LI, He XIE
期刊论文
Analytical algorithms of compressive bending capacity of bolted circumferential joint in metro shield
期刊论文
Application of coupled XFEM-BCQO in the structural optimization of a circular tunnel lining subjected
Nazim Abdul NARIMAN, Ayad Mohammad RAMADAN, Ilham Ibrahim MOHAMMAD
期刊论文
Digital microfluidics: A promising technique for biochemical applications
He WANG, Liguo CHEN, Lining SUN
期刊论文
Finite element analysis on the seismic behavior of side joint of Prefabricated Cage System in prefabricated
Yunlin LIU, Shitao ZHU
期刊论文
Precast steel–UHPC lightweight composite bridge for accelerated bridge construction
Shuwen DENG, Xudong SHAO, Xudong ZHAO, Yang WANG, Yan WANG
期刊论文
Dynamic characteristics of a magnetorheological pin joint for civil structures
Yancheng LI,Jianchun LI
期刊论文