期刊：
Theoretical and Applied Fracture Mechanics,2006年46(3):175-201 ISSN：0167-8442
通讯作者：
Sih, GC
作者机构：
[Tang, X. S.] School of Bridge and Structural Engineering, Changsha University of Science and Technology, Changsha, Hunan 410076, China;[Sih, G. C.] Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, PA 18015, United States;[Sih, G. C.] School of Mechanical and Power Engineering, East China University of Science and Technology, Mailbox 295, 130 Melong Road, Shanghai, 200237, China
通讯机构：
[Sih, GC ] ;E China Univ Sci & Technol, Sch Mech & Power Engn, Mailbox 295,130 Melong Rd, Shanghai 200237, Peoples R China.
关键词：
line crack;microstructure;multiscaling;maximum stress;minimum energy;density;physical-analytical matching;size and time;single branch;double branch;local and global;failure criteria;fracture mechanics
期刊：
Theoretical and Applied Fracture Mechanics,2006年46(2):87-104 ISSN：0167-8442
通讯作者：
Sih, GC
作者机构：
[Tang, X. S.] School of Bridge and Structural Engineering, Changsha University of Science and Technology, Changsha, Hunan 410076, China;[Sih, G. C.] School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China;[Sih, G. C.] Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, PA 18015, United States
通讯机构：
[Sih, GC ] ;E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China.
关键词：
double singularities;double eigenvalues;double eigenvectors;crack and;wedge tip with two singularities;micro/macro crack;restraining stress;closed and open cracks;geometry/load/material dependency;defect;configuration and mixed boundary conditions
关键词：
coupled interaction of vehicle-bridge;crack;nonlinear vibration;Runge-Kutta method
摘要：
Study of coupled interaction of moving oscillating loads involved the derivation of the dynamical equations of cracked main beam of bridge. Use was made of the Hamilton principle and the hypothesis for Euler-Bernoulli beam. Using the Runge-Kutta method, the nonlinear equations were solved. Then the influence of different location and depth of crack on nonlinear vibration behaviors for the cracked main beam of bridge was discussed by the numerical calculation.
作者机构：
[张平] Institute of Geotechnical Engineering, College of Civil Engineering, Hunan University, Changsha 410082, China;[贺若兰] School of Bridge and Structure Engineering, Changsha University of Science and Technology, Changsha 410076, China;[徐建光; 李宁] Institute of Geotechnical Engineering, Xi'an University of Technology, Xi'an 710048, China
通讯机构：
Institute of Geotechnical Engineering, College of Civil Engineering, Hunan University, China
作者机构：
[Chen, Yonggui] Institute of Geotechnical Engineering, Changsha University of Science and Technology, Changsha 410076, China;[Zhou, Han; Zhang, Keneng] Faculty of Architectural Engineering, Kunming University of Science and Technology, Kunming 650224, China;[Zhang, Keneng] School of Geoscience and Environmental Engineering, Central South University, Changsha 410083, China;[Zou, Yinsheng] School of Civil Engineering, Hunan University, Changsha 410082, China
通讯机构：
Institute of Geotechnical Engineering, Changsha University of Science and Technology, China
关键词：
Analysis;Criteria for design;Economics;Engineering;Investments;Risk assessment;Seepage
摘要：
The safety of anti-seepage was analysis based on economic decision-making theory. A new method for the selection of criteria for security and design on anti-seepage, based on economical risk analysis, was discussed in detail. A risk decision model of criteria for the anti-seepage design was developed under the condition of the constraint that the risk should less than the acceptable risk level/the criteria for security. A project of the leakage of mine tailing dam in Jiangxing is analyzed with the methods to show its feasibility and rationality.
作者机构：
[肖勇刚] College of Bridge and Struct. Engr., Changsha University of Science and Technology, Changsha 410076, China;[肖勇刚; 傅衣铭] Dept. of Engr. Mechanics, Hunan University, Changsha 410082, China
通讯机构：
College of Bridge and Struct. Engr., Changsha University of Science and Technology, China
作者机构：
[张建仁; 刘扬] School of Bridge and Structural Engineering, Changsha University of Science and Technology, Changsha 410076, China;School of Civil Engineering and Architecture, Central South University, Changsha 410075, China
通讯机构：
School of Bridge and Structural Engineering, Changsha University of Science and Technology, China
作者机构：
[陈政清] College of Civil and Architectural Engineering, Central South University, Changsha 410075, China;[颜东煌] School of Bridge and Structural Engineering, Changsha University of Science and Technology, Changsha 410076, China;[陈常松] College of Civil and Architectural Engineering, Central South University, Changsha 410075, China<&wdkj&>School of Bridge and Structural Engineering, Changsha University of Science and Technology, Changsha 410076, China
通讯机构：
[Chen, C.-S.] C;College of Civil and Architectural Engineering, Central South University, China
作者机构：
[杨端生] Institute of Bridge and Structural Engineering, Changsha University of Science and Technology, Changsha 410076, China;[田蕾; 黄炎] College of Astronautics and Material Engineering, National University of Defense Technology, Changsha 410073, China
通讯机构：
[Yang, D.-S.] I;Institute of Bridge and Structural Engineering, Changsha University of Science and Technology, China
摘要：
The stability analysis of concrete-filled steel tubular (CFST) tie-arch bridge is presented considering geometrical non-linearity and material non-linearity and a large model bridge has been analyzed by the method. The effects of different load distributions and wind loads on the ultimate load-carrying capacity of the bridge are investigated. Calculations and analyses show that correct evaluation of ultimate load-carrying capacity of the structure can be made only in consideration of geometrical non-linearity of the structure and material non-linearity at the same time.
摘要：
Clay-solidified grouting curtains are commonly used for remediation by containment or pollution prevention, in addition to their use as a barrier to water flow in municipal solid waste(MSW) landfills. A hydrological model of water flow and a hydrodynamic model of contaminant are presented to simulate the migration of leachate through clay-solidified grouting curtain in MSW landfills, with particular attention paid to the role of diffusive and adsorptive fluxes in contaminant transport. The models were applied to simulate the sensitivity of the curtain's behavior to changes in parameters, such as thickness, depth, permeability coefficient, diffusion coefficient, resistance coefficient and concentration, and also to demonstrate the contaminant distribution on the evolution of travel time and offset distance of clay-solidified grouting curtain in landfills. It is found that a part of leachate components stays or is retarded in clay-solidified grouting curtain by precipitate or exchange, the retention rate is closely related to composition of clay solidified grouting curtain, more than 80%, and the maximum occurs at the cement-clay ratio of 2 : 4 under experimental conditions. Contamination distribution is variable on travel time and offset distance, the highest concentration takes place where the contamination intensity is nearest to the pollution resource or takes place at early middle period of transport, and the pollutant attenuates gradually. The results indicate that clay-solidified grouting curtain with a proper thickness, a low permeability coefficient and a high resistance coefficient might serve as a sufficiently effective vertical barrier against leachate seepage and contamination migration in MSW landfills.
通讯机构：
[Sih, GC] L;Lehigh Univ, Inst Fracture & Solid Mech, Dept Mech Engn & Mech, Bethlehem, PA 18015 USA.
关键词：
three stages of scaling;macro-crack;micro-crack;screw dislocations;mesoscopic zones;cross scaling;smoothing discontinuities;scale multiplier;anti-plane shear deformation;continuous to discrete;multiscaling;STRONG SINGULARITIES;DAMAGE;MESO;WEAK;TIP
