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Journal of Central South University 2015年第8期22卷 3059-3068页

作者： Esmail Aflaki Alborz Hajiannia civil and Environmental engineering Department Amirkabir University of Technology

The present work ascertains the feasibility of oil residue treatment for stabilizing wind-blown sand dunes. Various combinations of natural collapsible saline from the Jandaq desert of Iran and oil residue from distillation towers of Iranian refineries were tested in laboratory experiments. Stabilized sands were evaluated in terms of geotechnical properties, permeability, and oil retention characteristics(i.e. bonding mechanisms, leaching and migrating behaviour of oil residue from the stabilized sands). Since the presence of oil residue in soils can pose an environmental threat, the optimum retention capacity of the stabilized sands is of critical concern. Relative to sand that was not augmented with oil residue, specimens made of 7% oil residues had the highest compressive strength, significantly higher cohesion and load bearing capacity, and considerably lower permeability. The effect of distilled water, saline water and municipal sewage on prepared specimens were also evaluated.

关键词： stabilization environment residual oil sand dune sewage

Variational mode decomposition based modal parameter identification in civil engineering

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Frontiers of Structural and civil engineering 2019年第5期13卷 1082-1094页

作者： Mingjie ZHANG Fuyou XU School of civil engineering Dalian University of TechnologyDalian 116024China

An out-put only modal parameter identification method based on variational mode decomposition (VMD) is developed for civil structure identifications. The recently developed VMD technique is utilized to decompose the free decay response (FDR) of a structure into to modal responses. A novel procedure is developed to calculate the instantaneous modal frequencies and instantaneous modal damping ratios. The proposed identification method can straightforwardly extract the mode shape vectors using the modal responses extracted from the FDRs at all available sensors on the structure. A series of numerical and experimental case studies are conducted to demonstrate the efficiency and highlight the superiority of the proposed method in modal parameter identification using both free vibration and ambient vibration data. The results of the present method are compared with those of the empirical mode decomposition-based method, and the superiorities of the present method are verified. The proposed method is proved to be efficient and accurate in modal parameter identification for both linear and nonlinear civil structures, including structures with closely spaced modes, sudden modal parameter variation, and amplitude-dependent modal parameters, etc.

关键词： modal parameter identification variational mode decomposition civil structure nonlinear system closely spaced modes

Exploring the Applications of Digital Twin Technology in Enhancing Sustainability in civil engineering:A Review

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Structural Durability & Health Monitoring 2024年第5期18卷 577-598页

作者： Jiamin Huang Ping Wu Wangxin Li Jun Zhang Yidong Xu School of civil engineering Chongqing Jiaotong UniversityChongqing400074China School of civil engineering and Architecture NingboTech UniversityNingbo315100China School of civil engineering Lanzhou University of TechnologyLanzhou730050China

With the advent of the big data era and the rise of Industrial Revolution 4.0,digital twins(DTs)have gained sig-niﬁcant attention in various *** offer the opportunity to combine the physical and digital worlds and aid the digital transformation of the civil engineering *** this paper,605 documents obtained from the search wereﬁrst analysed using CiteSpace for literature visualisation,and an author co-occurrence network,a keyword co-occurrence network,and a keyword clustering set were ***,through a literature review of 86 papers,this paper summarises the current status of DT application in civil engineering based on a review of the origins,concepts,and implementation techniques of DTs,and it introduces the application of DTs in the full project *** study shows that DTs have great potential to address many of the challenges faced by civil *** this regard,the paper also presents some thoughts on the future directions of DT research.

关键词： Digital twins civil engineering full lifecycle literature visualisation analysis

Department of civil engineering, Universitas Katolik Parahyangan, Bandung, 40141, Indonesiaof loose sand with fungus

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Journal of Rock Mechanics and Geotechnical engineering 2020年第1期12卷 180-187页

作者： Aswin Lim Petra Cahaya Atmaja Siska Rustiani Department of civil engineering Universitas Katolik ParahyanganBandung40141Indonesia

This article presents an innovative method of bio-mediated soil improvement for increasing the shear strength of loose *** improvement is realized by mixing the loose sand with the inoculum of Rhizopus oligosporus,a kind of fungus widely used in food industry for making Indonesian *** objective of this article is to investigate the performance and mechanism of mixing tempeh inoculum as a binding agent of loose sand *** inoculum dosage,water content of loose sand,and curing time were examined for identifying the increment of unconfined compressive strength(q_u)of the *** results showed that q_u of the treated samples increased when the inoculum dosage was *** shows that 5.24%inoculum could yield 68 kPa of q_u,and 5%water content and 3 d curing time produced the maximum q_***,the mechanism of hypha and mycelium in binding the soil particles was clearly observed using a digital microscope and scanning electron microscope.

关键词： Bio-mediated soil improvement Loose sand Rhizopus oligosporus

Geosynthetics used to stabilize vegetated surfaces for environmental sustainability in civil engineering

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Frontiers of Structural and civil engineering 2017年第1期11卷 56-65页

作者： Jie HAN Jun GUO Department of civil Environmental and Architectural Engineering the University of Kansas Lawrence KS 66044 USA

Geosynthetics, factory-manufactured polymer materials, have been successfully used to solve many geotechnical problems in civil engineering. Two common applications are earth stabilization and erosion control. Geosynthetics used for earth stabilization include but are not limited to stabilized slopes, walls, embankments, and roads. Geosynthetics used for erosion control are mostly related to slopes, river channels and banks, and pond spillways. To enhance environmental sustainability, vegetation has been increasingly planted on the facing or surfaces of these earth structures. Under such a condition, geosynthetics mainly function as surficial soil stabilization while vegetation provides green appearance and erosion protection of earth surfaces. Recently, geosynthetic or geosynthetic-like material has been used to form green walls outside or inside buildings to enhance sustainability. Geosynthetics and vegetation are often integrated to provide combined benefits. The interaction between geosynthetics and vegetation is important for the sustainability of the earth and building wall surfaces. This paper provides a review of the current practice and research in the geosynthetic stabilization of vegetated earth and building surfaces for environmental sustainability in civil engineering with the emphases on geosynthetic used for erosion protection, geosynthetic-stabilized slopes, geosynthetic-stabilized unpaved shoulders and parking lots, and geosynthetic-stabilized vegetated building surfaces.

关键词： erosion geosynthetic stabilization sustainability vegetation

Developments and Applications of Neutrosophic Theory in civil engineering Fields:A Review

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Computer Modeling in engineering & Sciences 2023年第5期135卷 887-916页

作者： Zhenhan Zhang Jun Ye School of civil and Environmental engineering Ningbo UniversityNingbo315211China

Neutrosophic theory can effectively and reasonably express indeterminate,inconsistent,and incomplete *** Smarandache proposed the neutrosophic theory in 1998,neutrosophic theory and related research have been developed and applied to many important *** and fuzziness are one of the main research issues in the field of civil ***,the neutrosophic theory is very suitable for modeling and applications of civil engineering *** review paper mainly describes the recent developments and applications of neutrosophic theory in four important research areas of civil engineering:the neutrosophic decision-making theory and applied methods,the neutrosophic evaluation methods and applications of slope stability,the neutrosophic expressions and analyses of rock joint roughness coefficient,and the neutrosophic structural optimization methods and *** terms of these research achievements in the four areas of civil engineering,the neutrosophic theory demonstrates its advantages in dealing with the indeterminate and inconsistent issues in civil engineering and the effectiveness and practicability of existing applied *** the future work,the existing research results will be further improved and extended in civil engineering *** addition,the neutrosophic theory will also have better application prospects in other fields of civil engineering.

关键词： Neutrosophic theory civil engineering decision-making slope stability joint roughness coefficient structural optimization

Biological process of soil improvement in civil engineering:A review

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Journal of Rock Mechanics and Geotechnical engineering 2016年第5期8卷 767-774页

作者： Murtala Umar Khairul Anuar Kassim Kenny Tiong Ping Chiet Department of Geotechnics and Transportation engineering Faculty of Civil EngineeringUniversiti Teknologi Malaysia

The concept of using biological process in soil improvement which is known as bio-mediated soil improvement technique has shown greater potential in geotechnical engineering applications in terms of performance and environmental sustainability. This paper presents a review on the soil microorganisms responsible for this process, and factors that affect their metabolic activities and geometric compatibility with the soil particle sizes. Two mechanisms of biomineralization, i.e. biologically controlled and biologically induced mineralization, were also discussed. Environmental and other factors that may be encountered in situ during microbially induced calcite precipitation （MICP） and their influences on the process were identified and presented. Improvements in the engineering properties of soil such as strength/stiffness and permeability as evaluated in some studies were explored. Potential applications of the process in geotechnical engineering and the challenges of field application of the process were identified.

关键词： Bio-mediated soil improvement Microorganisms Metabolic activities BiomineralizationUrease activity

Integration of Peridynamic Theory and OpenSees for Solving Problems in civil engineering

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Computer Modeling in engineering & Sciences 2019年第9期120卷 471-489页

作者： Quan Gu Lei Wang Surong Huang School of Architecture and civil engineering Xiamen UniversityXiamen361005China School of Aerospace engineering Xiamen UniversityXiamen361005China.

Peridynamics(PD)is a powerful method to simulate the discontinuous problems in civil ***,it may take a lot of effort to implement the material constitutive models into PD program for solving a broad range of *** is an open source software which includes a versatile material library and has been widely used by researchers and engineers in civil *** this context,the paper presents a simple but effective approach to integrate PD with OpenSees by using a Client-Server(CS)software integration technique,such that the existing material constitutive models in OpenSees can be directly used by *** applications are presented to verify the new PD-OpenSees *** first one is a plate with a pre-crack subject to horizontal load simulated using a three-dimension(3D)multi-yield-surfaces plasticity model,and the second one is a concrete block with a rectangular hole subject to a uniaxial loading condition simulated using a 3D Cap plasticity *** shows that the generation/propagation of cracks of the elastoplastic materials(e.g.,concrete and soil)can be analyzed by combing PD and three-dimensional plasticity constitutive models without compiling/linking these complex material models into PD ***,the integrated PDOpenSees platform presented herein is potentially capable to solve a wide range of complex problems in civil engineering.

关键词： Peridynamics OpenSees client-server technique Cap plasticity model multiyield surface model

Do civil engineering fronts emerge from interdisciplinary research?

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Frontiers of Structural and civil engineering 2023年第1期17卷 1-9页

作者： Jie HE Junlan YAO Xin CHEN Fang LIU Hehua ZHU College of civil engineering Tongji UniversityShanghai 200092China State Key Laboratory for Disaster Reduction in civil engineering Tongji UniversityShanghai 200092China School of Economics and Management Tongji UniversityShanghai 200092China Library Tongji UniversityShanghai 200092China

Interdisciplinary research is considered a source of innovativeness and creativity, serving as a key mechanism for creating recombination necessary for the evolution of science systems. The aim of this study is to quantitatively establish the connection between interdisciplinary research and the research fronts that have recently emerged in civil engineering. The degree of interdisciplinarity of the research fronts was measured by developing metrics from bibliographic analyses. As indicated by the consistent increase in the metrics of interdisciplinarity over time, research fronts tend to emerge in studies with increasing diversity in the disciplines involved. The active disciplines involved in the fronts vary over time. The most active disciplines are no longer fundamental but those associated with energy, environment, and sustainable development, focusing on solutions to climate change and integrating intelligence technologies.

关键词： interdisciplinary research research front bibliographic analysis

Quantification of disaster resilience in civil engineering:A review

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Journal of Safety Science and Resilience 2020年第1期1卷 19-30页

作者： Xinzheng Lu Wenjie Liao Dongping Fang Kaiqi Lin Yuan Tian Chi Zhang Zhe Zheng Pengju Zhao Key Laboratory of civil engineering Safety and Durability of China Education Ministry Department of Civil EngineeringTsinghua UniversityBeijing 100084China Beijing engineering Research Center of Steel and Concrete Composite Structures Tsinghua UniversityBeijing 100084China Department of Construction Management Tsinghua UniversityBeijing 100084China College of civil engineering Fuzhou UniversityFuzhou 350108China

Resistance to unexpected disasters and rapid post-disaster recovery(i.e.,disaster resilience)of cities are extremely necessary owing to the concentrated risk of *** quantification can adequately reflect the capacity of a city to withstand *** existing studies have focused on and proposed several frameworks on the quantitative measures of disaster resilience,and the corresponding research objects include different types of disasters(e.g.,earthquake,hurricane,flood,and fire),various domains(e.g.,engineering,social,and economic),and multiple levels(e.g.,city,community,and building).Among these research objects,studies on seismic resilience in civil engineering are relatively ***,studies on resilience in civil engineering have paid significant attention to the dynamics of engineering facilities and the engineering-related social and economic functions,including city-scale engineering,social,and economic functionalities,and essential functionalities of building,transportation,lifeline,and nonphysical subsystems of a ***,based on the review of resilience studies carried out in recent years,the framework and specifications for the quantification of disaster resilience of civil engineering systems subjected to earthquakes and other unexpected disasters are *** of disaster resilience assessment of cities and the corresponding subsystems are ***,several case studies are reviewed,and resilience limit-state analyses of communities and buildings are performed.

关键词： Resilience quantification in civil engineering Urban system Infrastructure and distributed network Single structure Resilience limit state