检索结果-南通市图书馆

Physical modeling and visualization of soil liquefaction under high confining stress

在线全文

cnki会议

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2005年第1期4卷 47-57页

作者： Lenart González Tarek Abdoun Mourad Zeghal Vivian Kallou Michael K.Sharp dept.of civil and Environmental Engineering Rensselaer Polytechnic Inst.(RPI)TroyNYUSA Mueser Rutledge Consulting Engineers 225 W 34th StreetNew YorkNYUSA US Army Engineer Research and Development Center VicksburgMSUSA

The mechanisms of seismically-induced liquefaction of granular soils underhigh confining stresses are still not fully *** of these mechanisms is generallybased on extrapolation of observed behavior at shallow *** centrifuge model tests wereconducted at RPI's experimental facility to investigate the effects of confining stresses on thedynamic response of a deep horizontal deposit of saturated *** was observed at highconfining stresses in each of the tests.A system identification procedure was used to estimate theassociated shear strain and stress time *** histories revealed a response marked byshear strength degradation and dilative *** recorded accelerations and pore pressures wereemployed to generate visual animations of the *** visualizations revealed a liquefactionfront traveling downward and leading to large shear strains and isolation of upper soil layers.

关键词： centrifuge modeling high confining stress liquefaction system identification visualization

维普期刊数据库

Editorial:Resilience of structures to earthquakes special issue

在线全文

学校读者我要写书评

暂无评论

Resilient Cities and Structures 2023年第1期2卷 162-162页

作者： R.S.Henry Y.C.Kurama University of Auckland Dept.of Civil and Environmental EngineeringNew Zealand University of Notre Dame Dept.of Civil and Environmental Engineering and Earth SciencesUSA

Resilient structures that can not only survive large earthquakes but also allow for rapid recovery of their occupancy and functionality are critical to improving societal *** addition to satisfying the basic life-safety design objectives,structures are increasingly being designed to higher performance objectives that speciﬁcally target reduced damage,repairability,and rapid *** technologies and novel materials continue to be developed to design resilient seismic resisting structural *** the component design,the performance of the entire structure including the interactions between structural systems as well as non-structural components must be considered to meet the required performance ***,the resilience of existing structures can be improved through appropriate strengthening and retroﬁt solutions that target speciﬁc performance limits.

关键词： seismic structures structural

Sustainable Transportation Strategy in Hong Kong

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Sustainable Transportation Strategy in Hong Kong

第四届粤港澳可持续发展研讨会

作者： William H K Lam S C Wong dept.of civil and Structural Engineering The Hong Kong Polytechnic University Hong Kong dept.of civil Engineering The University of Hong Kong Hong Kong

This paper reviews the development of a sustainable transportation strategy for Hong Kong and highlights some of the key issues,challenges,and opportunities in a wider re- gional context.

关键词：

TRANSPORT OF GRAVELS WITH DIFFERENT RANGES OF GRAIN SIZES IN A STEEP CHANNEL

在线全文

cnki会议

学校读者我要写书评

暂无评论

International Journal of Sediment Research 2005年第2期20卷 143-155页

作者： Jau-Yau LU,Chih-Chiang SU Prof. dept.of civil Engrg. National Chung-Hsing University Taichung Taiwan China Ph.D.student dept.of civil Engrg. National Chung-Hsing University Taichung Taiwan China

An understanding of the transport mechanism of gravel-bed rivers is very important for the river management and engineering works. The main objective of this study was to conduct a series of laboratory experiment in a steep flume to investigate the particle segregation and the transport rate of nonuniform gravel. Median sizes of 15 mm and 7.5 mm,and gradation coefficients of 1.5 and 2.0 were selected for the particle size distributions of nonuniform gravel. In addition to the 36 sets of data collected in this study,635 sets of existing data for gravel with both nonuniform and nearly uniform sizes were analyzed. According to the results of the sieve analysis and the related theory,hiding functions for both particle size distributions of this study were derived. An attempt was made to develop an Einstein-type transport relationship for nonuniform gravel using dimensionless parameters with mean size as a representative particle size. A modified Schoklitsch-type sediment transport equation with a critical unit flow discharge was also developed to reasonably predict the transport rate of gravels. In addition,an artificial neural network (ANN) model with a back-propagation network (BPN) algorithm was also applied in this study.

关键词： Sediment transport rate Bed load Steep flume Nonuniform gravel Particle gradation Hiding phenomenon Back-propagation network Artificial neural network

GREEN BUILDING STRATEGIES FOR LEED CERTIFIED RECREATIONAL FACILITIES

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Green Building 2017年第2期12卷 149-166页

作者： Joseph J.Kim Marco A.Sanchez Del Aguila Sunkuk Kim Department of civil Engineering and Construction Engineering Management California State University Long Beach Department of Architectural Engineering Kyung Hee UniversityKorea The Port of Los Angeles dept.of civil Engineering and Construction Engineering Management California State University Long Beach Department of Architectural Engineering Kyung Hee UniversityKorea

Student recreational facilities at higher education institutions are increasingly utilizing green building strategies to decrease their impact on the campus environment and to increase economic and social impacts on the *** nearly two decades of LEED building development,comparative studies of LEED strategies among buildings are not rare,but still in demand due to the lessons learned from other LEED certified *** paper presents case studies on the green building strategies utilized for six student recreational facilities certified by the *** Building Council’s Leadership in Energy and Environmental Design rating system and examines favorable strategies that lead to the success of obtaining higher rating *** comparative analysis results showed that the energy and atmosphere and indoor environmental quality categories that utilized energy performance optimization and innovative architectural designs for better daylights and views were major components for higher rating levels apart from conventional design criteria such as location,climate,and *** recreational facilities having higher ratings were more favorable in obtaining credits using central plants,stormwater design,innovative wastewater technologies,and light *** findings not only provide specific green buildings strategies for student recreational facilities,but they also enhance the green initiatives for future education facilities on university campuses.

关键词： green buildings LEED educational facilities recreation center case study

Symbol Method for Fast Similarity Search in Large Time Series Flight Databases

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Symbol Method for Fast Similarity Search in Large Time Serie...

2012 International Conference on Convergence Computer Technology(IC3T 2012)

作者： Yang Hui Zhang Guozhen dept.of Computer Science ＆ Technology civil Aviation of China

Taking into account the status of airline maintenance and the characteristics of time series search,we use a symbolic representation called Symbolic Aggregate Approximation to section the flight data linearity and then discrete them into a sequence of *** data which needs specific analysis should be *** to that,an index tree of query sequence for fast similarity search could be set to ensure that there are no omissions *** we do similarity search on the sequence transformed flight data,the fault models provided by experts are regarded as the standards so that the causes of the malfunctions can be fixed and the suggestions for maintenance can be *** use actual flying data to validate this *** efficiency and the simplicity of it have been proved.

关键词： Symbolic transform Similarity flight data

Line of thrust and theoretical load of masonry arch bridge

在线全文

cnki会议

学校读者我要写书评

暂无评论

Line of thrust and theoretical load of masonry arch bridge

ARCH’10-the 6th International Conference on Arch Bridges

作者： Mitsuo Tsutsui Yoji Mizuta Tsutomu Sakata Kokudo Engineering Consultants Co.Ltd. dept.of civil and Urban Design Engineering Kyushu Sangyo University dept.of civil Engineering Fukuoka University

ISBN: (纸本)9789537621100

The authors are introduced the differential equation for the load w that the line of thrust in the masonry arch bridge becomes *** the differential equation,an equation was *** the numerical example,the authors compared with the actual load of the masonry arch bridge and the theoretical *** addition,using the theoretical load,the authors considered the construction procedures of the masonry arch *** this method,the authors proved the correctness of this equation.

关键词：

Numerical analysis and experimental studies of membrane wrinkles

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Harbin Institute of Technology(New Series) 2010年第2期17卷 229-233页

作者：李云良鲁明宇谭惠丰谭忆秋 School of Transportation Science and Engineering Harbin Institute of Technology Post-doctoral Research Center in civil Engineering Harbin Institute of Technology dept.of Mechanical Engineering Hong Kong Polytechnic University Center for Composite Materials Harbin Institute of Technology

Wrinkling patterns and the rules of wrinkling formation and expansion were analyzed in this paper. Direct disturbing method,a numerical method for membrane wrinkling analysis,was established based on finite element programme. The experimental results using photogrammetric procedure were compared with numerical analysis results. It is shown that the reasonable wrinkling deformation can be obtained by rational mesh density and timely removes the initial flaw during analysis. Wrinkles firstly appear on the left and right sides then extend to the membrane center,and the wrinkling amplitude increases with shear displacement. Results from both of the experiments and numerical analysis have a good agreement,which verifies the rationality of the numerical analysis method.

关键词： membrane wrinkle numerical analysis photogrammetric procedure

维普期刊数据库

Study on pile drivability with one dimensional wave propagation theory

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2003年第6期4卷 62-72页

作者：陈仁朋王仕方陈云敏 Wenling Construction Bureau Wenling 317500 Zhejiang Province Hangzhou 310027 Geotechnical Engineering Institute dept.of civil Engineering China Geotechnical Engineering Institute Zhejiang University

Pile drivability is a key problem during the stage of design and construction installation of pile foundations. The solution to the one dimensional wave equation was used to determine the impact force at the top of a concrete pile for a given ram mass, cushion stiffness, and pile impedance. The kinematic equation of pile toe was established and solved based on wave equation theory. The movements of the pile top and pile toe were presented, which clearly showed the dynamic displacement, including rebound and penetration of pile top and toe. A parametric study was made with a full range of practical values of ram weight, cushion stiffness, dropheight, and pile impedance. Suggestions for optimizing the parameters were also presented. Comparisons between the results obtained by the present solution and in situ measurements indicated the reliability and validity of the method.

关键词： Pile Drivability Stress wave theory