检索结果-内蒙古大学图书馆

Strength and Microstructure of Mortar Containing Glass Powder and/or Glass Aggregate

Journal of Wuhan University of technology(Materials Science) 2016年第6期31卷 1302-1310页

作者：刘数华 WANG Shu ZHOU Wei LI Lihua XIAO Henglin WEI Jianpeng TANG Wan State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Wuhan 430072 China China Construction Ready Mixed Concrete Co. Ltd. Wuhan 430000 China School of Civil Engineering and Architecture Hubei University of Technology Wuhan 430068 China

The compressive strength of mortar containing glass powder（GP） and/or glass aggregate（GA） was tested, and its microstructure was also studied by thermogravimetric and differential thermal analysis（TG-DTA）, scanning electron microscopy（SEM）, energy dispersive spectroscopic analysis（EDX）, and X-ray diffraction（XRD） techniques. The incorporation of GA would decrease the compressive strength of the mortar in the absence of GP. Incorporating both GA and GP could change the hydration environment, promote pozzolanic reaction of GP and improve the compressive strength. GP does not lead to but can effectively control ASR（Alkali Silica Reaction）. GP and GA do not transform the type of hydrates, but have a great influence on the amounts of hydration products, and generate more calcium silicate hydrate（C-S-H gel） with lower Ca/Si ratio. GP and GA with good gradation will make the microstructure denser.

关键词： glass powder glass aggregate mortar strength microstructure

来源：评论

学校读者我要写书评

暂无评论

Comprehensive assessment of options for renovation of buildings and city blocks

引用

IOP Conference Series: Earth and Environmental Science 2018年第1期177卷

作者： K Yu Losev G O Chulkov V O Chulkov Department 'Information Systems Technology and Automation in Construction' Research University 'Moscow State University of Civil Engineering' 26 Yaroslavl highway Moscow 129337 Russia Scientific and Project Center 'City Development' 19 Building 3 prospekt Mira Moscow 129090 Russia Department 'Technology and organization of construction production' Research University 'Moscow State University of Civil Engineering' 26 Yaroslavl highway Moscow 129337 Russia

The study contributes to infographic approaches when providing comprehensive assessment of city areas during reorganization. It presents infografic models and prospective tool for infographic modelling, visualization, analysis and quality evaluation. The object of study is infographic model of 'renovation' options of city blocks. The term 'renovation' has been actively used in the directive documents and Decrees of the Government of Moscow from 2005 till nowadays. The task of the study was the development of methods for assessing the diversity of parameters of demolished, reconstructed and newly erected buildings and structures of housing stock and social infrastructure. Method that has been used in the study was structural modification of the basis infographic model presented in the article. Conclusions of the study show that a 'star' multilayered infographical model produces good results when evaluating the quality of urban area 'renovative' variants and it proposes R-language as a development tool for such future models. Also, the study has indicated to the fact that city environment began to be evaluated not only as a socio-technical, but also as a cyber-physical system.

关键词：

来源：评论

学校读者我要写书评

暂无评论

engineering companies strategizing globalisation 32

Engineering companies strategizing globalisation

引用

32nd Annual Association of Researchers in construction Management Conference, ARCOM 2016

作者： Buser, Martine Bosch, Petra Koch, Christian Division of Construction Management Department of Civil and Environmental Engineering Chalmers University of Technology GothenburgSE-412 96 Sweden

The rapid globalisation of the construction market should bring new potential for the engineering construction (EC) industry in terms of collaboration inside and outside of the national borders. Especially, engineering outsourcing is established as a global sector practice and expected to be a booming business in the future. There is a rich literature describing possible strategies, organisational forms and set ups and potential benefits of these internationalisation processes. Besides, the challenges that these forms of cooperation may involve have also largely be identified and discussed. However, there is less focus on how these collaborations occur in practice, in particular how they are initiated and negotiated and in which context they take place. Looking at a small network of Swedish engineering companies which have been active on the globalised market, we followed their concrete considerations, choices and actions in developing contacts and creating collaboration with foreign partners. To do so, we draw on a strategy as practice approach. The practice perspective defines strategy as something performed by people opposed to something a company has, and identifies strategy as the strategic activities reiterated in time by the diverse actors interacting in an organizational context, i.e., strategizing. The empirical material consists mainly of a longitudinal case study of a small engineering company and its network trying to expand to China, including interviews of two project managers of other engineering companies who have also engaged in an internationalisation process. The results feature project managers as strategy practitioners, using, what appears mundane project management tools, yet contain the radical strategic moves of expanding to China. This praxis underlines the lack of classical long term strategy in favour of ad hoc solutions and the central role of project managers in creating these international projects.

关键词： Commerce

来源：评论

学校读者我要写书评

暂无评论

Research of construction Safety Factors Based on the Factor Analysis Method

Research of Construction Safety Factors Based on the Factor ...

引用

2016 International Conference on construction and Real Estate Management, ICCREM 2016

作者： Xu, Chengjie Zhang, Yuanyuan Xu, Bochao Dept. of Construction Management Harbin Institute of Technology Harbin150001 China Postgraduate Dept. of Construction Management Harbin Institute of Technology Harbin150001 China Undergraduate School of Civil Engineering Harbin Institute of Technology School of Civil Engineering Northeast Forestry Univ Harbin150040 China

ISBN: (纸本)9780784480274

With the diversification of construction products and the modernization of construction technology, the factors of construction safety have become more complex. Studying the factors under the new situation is of great importance to improve the production efficiency of construction and reduce the occurrence of construction safety accidents. Based on literature review and expert consultation, several factors that affect the construction safety are summarized. By means of questionnaires, these factors are given marks. Then, seven representative comprehensive factors are extracted from these factors through factor analysis, which are considered as key factors affecting the construction safety and can provide a reference of safety management for the construction enterprises and other related parties. © 2017 American Society of civil Engineers.

关键词： Safety factor

来源：评论

学校读者我要写书评

暂无评论

Building information standards: Big data technologies prevented from becoming big in building 32

Building information standards: Big data technologies preven...

引用

32nd Annual Association of Researchers in construction Management Conference, ARCOM 2016

作者： Beemsterboer, Sjouke Koch, Christian Division of Construction Management Department of Civil and Environmental Engineering Chalmers University of Technology GothenburgSE-412 96 Sweden

The increased use of BIM in the building sector have led certain actors to commence riding on the big data hype. Big data techniques allow the use of unstructured data alongside structured data to an extent that was previously impossible. Science and technology studies (STS) approaches are used to examine information standards as a technology to organise big data applications in building. Crucially, opportunities are strongly guided by the data that is collected about buildings, and thus by the understanding of what a building is. Building information standards are viewed as performative and their becoming as a process of power, understanding and emerging interests. The empirical material stems from a study on the shaping of a Danish classification standard and its implementation in a Danish hospital project. The analysis shows several performative aspects and particular ways in which a building can be understood: First, there is a focus on the internal structure of a building as a product and less on the process that leads to making a product. Second, a systems theory approach to building structure understands building components as having functions in a way that aligns well with the installation part of the building. Third, delimitations within which information standards propose to collect data implies a focus on building components as material over components being economical entities. Performativity struggles during the shaping of the standard are expected to continue also during its implementation phase in an environment where multiple standards co-exist. On this background we discuss whether the building information standard, meant to be a big data technology enabler, might become a barrier for big data.

关键词： Standardization

来源：评论

学校读者我要写书评

暂无评论

Research on layout and construction performance of cultural and creative industry parks in Xihu District of Hangzhou

引用

IOP Conference Series: Earth and Environmental Science 2018年第6期153卷

作者： Juan Wang Jun Zhou College of Urban Construction Zhejiang Shuren University Hangzhou Shuren Street 310015 China College of Civil Engineering and Architecture Zhejiang University of Technology Hangzhou Chaowang Road310014 China

Combing the current situation of cultural and creative industry parks in Xihu District of Hangzhou, analyzing the supporting elements of its layout, cultural and creative industry Pars in Xihu District have the characteristics of obvious group block distribution and the dominant function of each park is obviously influenced by the supporting elements. This paper selected four municipal cultural and creative industry parks for the investigation of their operating conditions. It is found out that the park construction performance of different construction foundation, positioning, development model is quite afferent. Therefore, it suggests that the creative industry park should be integrated with urban life, commerce, business and other functions. The park with weak ecological foundation should optimize the image of the park by means of urban renewal, and the policy should be inclined to retain talents and so on.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Numerical analysis of the factors affecting the anti-slide pile design

引用

engineering Transactions 2017年第2期65卷 335-350页

作者： Tang, Yi Xie, Qiang Gou, Wenjin Wan, Renfeng Li, Liang School of Civil Engineering Chongqing University Chongqing40045 China Key Laboratory of New Technology for Construction of Cities in Mountain Area Ministry of Education Chongqing University Chongqing400045 China Chongqing Jianzhu College Chongqing400072 China

The use of anti-slide piles is one of the most important landslide remediation methods, and it is widely used in practical engineering. Anti-slide pile design elements include pile plane position and spacing, the anchorage depth, and pile cross-sectional shape and size. With the displacement of an anti-slide pile head as the evaluation index of the anti-sliding effect of anti-slide pile, ANSYS was used to establish models for numerical simulation to provide analysis of the pile spacing and to determine the anchoring depth and cross- sectional dimensions of the impact of pile top displacement. Using the control variable method, the influence trends and the degree of influence of three factors on the displacement of pile top were studied. Through this analysis, we found that the influence of the pile cross-section size change on the maximum displacement of the pile head is relatively weak, whereas the anchoring depth and pile spacing have a greater impact on the changes in the maximum displacement of the pile;there is a limit of the design parameters, beyond which improvement in the design value is not obvious regarding the limiting of the displacement of the pile top. Further study could investigate the choice of design parameters to optimize the design of anti-slide pile. © 2017, Polish Academy of Sciences. All rights reserved.

关键词： Numerical analysis

来源：评论

学校读者我要写书评

暂无评论

Vulnerability Assessment of Underground Mine Stopes Filled with Granular Backfills 2

Vulnerability Assessment of Underground Mine Stopes Filled w...

引用

2nd Geo-Chicago Conference: Geotechnics for Sustainable Energy, Geo-Chicago 2016

作者： Rajeev, P. Sivakugan, N. Dept. of Civil and Construction Engineering Swinburne Univ. of Technology VIC3122 Australia College of Science Technology and Engineering James Cook Univ. TownsvilleQLD4811 Australia

ISBN: (数字)9780784480137

ISBN: (纸本)9780784480182

Satisfactory performance of mine barricade is important in order to avoid any unexpected risk due to barricade failures. The barricades are subjected to various levels of stresses and strains with time as a result of the deposition of the backfill material. Further, the strength of the barricade material degrades over time. The design of barricades relies on simplified analytical methods to determine the barricade capacity and load acting on it. Marston's theory and its modifications are being used to determine the average vertical stress variation with depth within the stope. Then, the load on the barricade is determined on the basis of the vertical stress at the barricade level and setback distance of the barricade. Several models were proposed to determine the load on the barricade, which show significant variation in the prediction. In the past, several failures were recorded in the mine stopes due to inadequate understanding on the loading on the barricade. Therefore, understanding the effect of variation in barricade material strength and load is necessary. In this paper, an attempt is made to quantify the effect of uncertainty in material strength, earth pressure prediction, barricade geometric properties on the safety of the barricade. The probability of failure and reliability index are computed, and then a capacity reduction factor of barricade strength is proposed to increase the reliability index to the acceptable level. The result shows that the variability in the brick strength has a significant effect (i.e., more than 70%) on the safety of the barricade in comparison to other source of uncertainty. The difference in estimated capacity reduction factor for various earth pressures prediction models is not large (~ 0.1). Therefore, a single factor can be used in the design practice to account the total variability. © ASCE.

关键词： Elasticity

来源：评论

学校读者我要写书评

暂无评论

Organizational and technological forecasting and justification of the final stages of the life cycle of the construction project

引用

IOP Conference Series: Materials Science and engineering 2018年第2期463卷

作者： E Gusakova Doctor of Science's professor Department of information systems technology and automation in construction National Research Moscow State University of Civil Engineering 26 Yaroslavskoe Sh. Moscow 129337 Russia

The investment and construction industry demonstrates a steady trend of accelerating the moral and physical wear and tear of fixed assets. In these conditions, methods for forecasting the most probable transformations of the construction project, of organizational and technological methods for dismantling of structures, of application and disposal of used materials, and of the complete liquidation of the facility become in demand. The organizational and technological transition of the construction industry into the closed life cycle of the construction object becomes the actual and priority strategic goal. The transition methodology assumes that the conceptual stage of design is supplemented by forecasting the final stages of the building's life cycle, which includes ensuring the processability of liquidation of the real estate object and planning the full life cycle of the facility. To do this, at the early stages of design, the most probable time for the moral and physical aging of the structures and engineering systems of the object is determined; the most probable tasks of modernization, reconstruction and liquidation are identified; substantiated and provided for by organizational and technological solutions, corresponding to the tasks of reconstruction and liquidation of the project. Obviously, with the current scale of construction, the urban development area should be considered in the project as a common space of vital activity. Accordingly, the goals and interests of participants in the life cycle of the building should be implemented predictably and manageable in the direction of integrating goals and interests on the basis of ecosystem thinking. We need to predict and evaluate the likely reactions of socio-economic and ecological systems, and in accordance with this, adjust the goals, directions and scale of investment in construction. The development of applied research in this area will make it possible to bring investment and construction activities t

关键词：

来源：评论

学校读者我要写书评

暂无评论

A Modified Mohr-Coulomb Model to Simulate the Response of Buried Pipes Subjected to Large Ground Displacement 1

A Modified Mohr-Coulomb Model to Simulate the Response of Bu...

引用

1st Geo-Chicago Conference: Sustainability and Resiliency in Geotechnical engineering, Geo-Chicago 2016

作者： Robert, Dilan J. Rajeev, P. School of Engineering RMIT Univ. MelbourneVIC3001 Australia Dept. of Civil and Construction Engineering Swinburne Univ. of Technology VIC3122 Australia

ISBN: (数字)9780784480120

ISBN: (纸本)9780784480182

At the present time, it is very common in practice (industry as well as in research) to utilize Mohr-Coulomb to simulate the soil behaviour in the application of soil-structure interaction problems. The model is often chosen considering its simplicity, ease of use, reasonable computational time and the high level of understanding among the engineers. However, the linear elastic-perfectly plastic Mohr-Coulomb model is unable to predict the softening behaviour of material and hence to predict the pipe load accurately when subjected to large soil movements such as from landslides or earthquakes. A user defined modified Mohr-Coulomb model is developed to capture the strain softening behaviour of soil and to simulate the pipeline response subjected to large ground deformation. The softening behaviour of the model has been calibrated on the basis of direct shear test data, and triaxial test data have been used for calibrating the yielding and flow characteristics of the model. The calibrated model has been applied to simulate the response of HDPE pipeline undergoing different ground displacements. Finally, the model response was used to develop a strain demand model for buried pipelines facilitating the risk assessments. © ASCE.

关键词： Earthquakes

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：