Water distribution system is the facility to provide water stably. But sometimes, water leakages in water distribution systems cause enormous economic damage and destabilize such systems. To estimate residual life in ...
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A score evaluation method is the most common deterioration evaluation technique used in Korea for the efficient maintenance of the water distribution network which is a major society-based facility. This study carried...
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作者：
Navaee, ShahnamGeorgia Southern University
Civil Engineering and Construction Management Department Allen E. Paulson College of Engineering and Information Technology United States
This paper presents an experimental study on the influence of wetting and drying on matric suction and moisture content of unsaturated compacted cohesive soils. Three as-compacted states and three levels of compaction...
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The distinctive paper is devoted to development of numerical methods of spatial plate-shell reinforced concrete structures analysis with allowance for non-linearities. Immediacy of the problem and its contemporary sta...
The distinctive paper is devoted to development of numerical methods of spatial plate-shell reinforced concrete structures analysis with allowance for non-linearities. Immediacy of the problem and its contemporary state (within Russia and without) are presented. Particularly types of diagrams for reinforced concrete structures modeling, construction of reinforced concrete general deformation models, strength criteria for reinforced concrete structures and methods of structural analysis, main objectives and scientific novelty of study, its theoretical and practical relevance are under consideration.
This study tried to comprehend the generation mechanism of the rip current at the enclosed beach by the groins. Firstly this study did field survey and comprehended the large scale and velocity of the rip current. In ...
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ISBN:
(纸本)9780989661133
This study tried to comprehend the generation mechanism of the rip current at the enclosed beach by the groins. Firstly this study did field survey and comprehended the large scale and velocity of the rip current. In this method, the rip current was pigmented by the sea water colorant, and the pigmented current was recorded as the aerial photograph by the multi-copter. Secondly, this study simulated the rip current in accordance with the results of field survey, and the results of simulation and filed survey ware compared.
Improving a soil is a process of increasing its physical/mechanical properties without changing its natural structure. Improvement of soil subbase is reached by means of the knitted materials, or other methods when st...
Improving a soil is a process of increasing its physical/mechanical properties without changing its natural structure. Improvement of soil subbase is reached by means of the knitted materials, or other methods when strong connection between soil particles is established. The method of DSM (Deep Soil Mixing) columns has been invented in Japan in 1970s. The main reason of designing cement-soil columns is to improve properties of local soils (such as strength and stiffness) by mixing them with various cementing materials. Cement and calcium are the most commonly used binders. However new research undertaken worldwide proves that apart from these materials, also gypsum or fly ashes can also be successfully implemented. As the Deep Soil Mixing is still being under development, anticipating mechanical properties of columns in particular soils and the usage of cementing materials in formed columns is very difficult and often inappropriate to predict. That is why a research is carried out in order to find out what binders and mixing technology should be used. The paper presents several remarks on the testing procedures related to quality and capacity control of Deep Soil Mixing columns. Soil improvement methods, their advantages and limitations are briefly described. The authors analyse the suitability of selected testing methods on subsequent stages of design and execution of special foundations works. Chosen examples from engineering practice form the basis for recommendations for the control procedures. Presented case studies concerning testing the on capacity field samples and laboratory procedures on various categories of soil-cement samples were picked from R&D and consulting works offered by Wroclaw University of Science and technology. Special emphasis is paid to climate conditions which may affect the availability of performing and controlling of DSM techniques in polar zones, with a special regard to sample curing.
To model the cumulative deformation of granular soils under cyclic loading, a mathematical model was proposed. The power law connection between the shear strain and loading cycle was represented by using fractional de...
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To model the cumulative deformation of granular soils under cyclic loading, a mathematical model was proposed. The power law connection between the shear strain and loading cycle was represented by using fractional derivative approach. The volumetric strain was characterized by a modified cyclic flow rule which considered the effect of particle breakage. All model parameters were obtained by the cyclic and static triaxial tests. Predictions of the test results were provided to validate the proposed model. Comparison with an existing cumulative model was also made to show the advantage of the proposed model.
The effectiveness of the implementation of construction waste reduction through 3R reflects the sustainability in construction waste management. Weak implementation of construction waste reduction through 3R among con...
The effectiveness of the implementation of construction waste reduction through 3R reflects the sustainability in construction waste management. Weak implementation of construction waste reduction through 3R among contractors will lead to unsustainable construction waste management. Increase in construction waste on landfills is critical especially on islands where land is very limited for solid waste disposal. This aim of this paper is to investigate current practice of construction waste reduction through 3R practice among contractors in Penang, Malaysia. The findings reported herein is based on feedbacks from 143 construction contractors of grade CIDB G7, G6 and G5 in Penang and experts from Penang Local Authority, CIDB in Penang and its Headquarters, National Solid Waste Management Department, and Headquarters of Solid Waste and Public Cleansing Management Corporation. Interviews and questionnaire surveys have been found that 3R practice is not mandatory in construction waste management in Penang. Only 39.8% construction contractors practiced 3R in managing their waste. Therefore, 3R practices should be emphasized in construction industry. Reducing wastes through 3R practices in construction industry is a way forward towards sustainable construction waste management especially in expanding the lifetime of landfill.
An existing beam-on-elastic-foundation (BEF) model was used to determine the perpendicular-to-grain tensile stresses in timber members subjected to loading parallel to the grain by bolted connections. A set of relativ...
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