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Online since: February 2012
Authors: Jin Xiao
Landslide emergency treatment refers to the engineering technology which makes the landslide deformation under control by taking effective mechanical control measure before sliding.
While the landslide now has been in the limit equilibrium state, which is very sensitive to external factors; mechanical control measures, such as earth-retaining walls and anti-slide piles, with the disadvantages of mass excavation volume, low construction speed and great interference to the slope, is not conducive to seize the preemptive opportunities of landslide emergency management, to protect the stable and keep the landslide from sliding and temporality protect the major facilities or houses.
Hence micro steel pipe pile may after all be accepted as a productive mechanical control measure to, which is simple and easy to carry out and economic and reliable.
Which affect the stability of the landslide is the pore water, a kind of groundwater existing in the slop eluvial deposit silty clays during artificial fill in the Quaternary System.
Emergency rescue means emergency treatment engineering technologies in order to quickly take control of landslide, by changing the mechanical conditions of the slope and keeping the slope from further deformation to protect the stable and keep the landslide from sliding.
While the landslide now has been in the limit equilibrium state, which is very sensitive to external factors; mechanical control measures, such as earth-retaining walls and anti-slide piles, with the disadvantages of mass excavation volume, low construction speed and great interference to the slope, is not conducive to seize the preemptive opportunities of landslide emergency management, to protect the stable and keep the landslide from sliding and temporality protect the major facilities or houses.
Hence micro steel pipe pile may after all be accepted as a productive mechanical control measure to, which is simple and easy to carry out and economic and reliable.
Which affect the stability of the landslide is the pore water, a kind of groundwater existing in the slop eluvial deposit silty clays during artificial fill in the Quaternary System.
Emergency rescue means emergency treatment engineering technologies in order to quickly take control of landslide, by changing the mechanical conditions of the slope and keeping the slope from further deformation to protect the stable and keep the landslide from sliding.
Online since: March 2024
Authors: Sroisiri Thaweboon, Boonyanit Thaweboon, Takashi Saito, Sirilak Mateekusontan
Dental caries, or tooth decay, is one of the most widespread chronic and multifactorial diseases affecting people worldwide.
Introduction Dental caries is one of the most widespread oral health problems affecting people of all age groups.
Streptococcus mutans possesses a unique integration of properties, making it more cariogenic than other bacteria in the biofilm.
The limitations of these applications were adverse effects on the retention of entire adhesive interfaces and a decrease in mechanical features.
These are factors to consider when using polymerized adhesives.
Introduction Dental caries is one of the most widespread oral health problems affecting people of all age groups.
Streptococcus mutans possesses a unique integration of properties, making it more cariogenic than other bacteria in the biofilm.
The limitations of these applications were adverse effects on the retention of entire adhesive interfaces and a decrease in mechanical features.
These are factors to consider when using polymerized adhesives.
Online since: September 2015
Authors: Ivo Kusák, Jan Martinek, Ladislav Carbol
Each have unique properties and also limitations.
It is known that several factors are affecting modulus of elasticity of concrete.
Air filled pores and micro-cracks play a major role in affecting the stress-strain performance of concrete [5].
Mechanical properties of the material are closely connected to the velocity of an ultrasonic wave.
More about MLS properties can be found in [11,12,13].
It is known that several factors are affecting modulus of elasticity of concrete.
Air filled pores and micro-cracks play a major role in affecting the stress-strain performance of concrete [5].
Mechanical properties of the material are closely connected to the velocity of an ultrasonic wave.
More about MLS properties can be found in [11,12,13].
Online since: December 2012
Authors: Ke Wei Ding, Wan Yun Yin, Ren Cai Jin, Yun Lin Liu, Gang Wang, Shou Chen Liu
quality control is better, Improve the quality of engineering and construction, Improve floor performance, Easy to control in the factory production of concrete protective layer thickness, Reinforced positioning control, ratio control of the concrete, the density of concrete control, concrete curing conditions, making the durability of the final component, which is the building of life greatly improved; Due to the presence of abdominal rod reinforced, Compared with ordinary laminated slabs of concrete, precast panels with a better overall performance; (2) Shorten the construction period, factory produced, significantly reduce on-site steel banding workload; The construction phase, the construction of prefabricated parts can be used as platforms and end of superimposed layers of concrete mold, elimination of cumbersome template works; The production cycle is short, Convenient on-site construction, Greatly improve the speed of construction, shorten the duration, construction of climate-affected
The structural elements affected by the residual deformation after the load is one of the important indicators to reveal the structure mechanical performance, so the residual deformation in structural tests should be observed structure uninstall structural deformation data recovery capabilities.
For the experimental phenomena and failure modes of treatment options: Can be a connection reinforced by increasing the seams of the reinforcement and anchorage length or lower reinforcement position, Measures to improve the effective height of structure, to make up for the widget in the local carrying capacity. 4 Splice plate bearing capacity factors The test only by increasing the seams connection reinforcement amount and anchorage length measures to improve the bearing capacity of the splice plate, did not consider the seams cross-section is the effective height of the splice plate bearing capacity.
Analysis and calculation to be seen: Seams section effective height is an important factor to affect splicing plate flexural capacity.
Through structural measures to increase the effective height of the cross-section of seams, improve the bearing capacity of the splice plate is feasible. 5 Conclusions Composite Slab static load test, to study the bearing capacity of deformation properties of the cracks to carry out the law is the mechanical characteristics of cross-section, the necessary analysis and test results , and analysis and experimental results were compared:1) Enhance superimposed board reinforcement at the seams and anchoring measures or change Reinforced location to increase the effective height, which not only can effectively pass internal forces, also improve the stitching laminated slabs of carrying capacity, so basically reached the benchmark Slab resistance; 2)Through appropriate structural measures to increase the effective height of the cross-section of seams to further enhance splicing carrying capacity of the composite plate; 3)Rely on a patchwork force transmission, composite panels can be two-way
The structural elements affected by the residual deformation after the load is one of the important indicators to reveal the structure mechanical performance, so the residual deformation in structural tests should be observed structure uninstall structural deformation data recovery capabilities.
For the experimental phenomena and failure modes of treatment options: Can be a connection reinforced by increasing the seams of the reinforcement and anchorage length or lower reinforcement position, Measures to improve the effective height of structure, to make up for the widget in the local carrying capacity. 4 Splice plate bearing capacity factors The test only by increasing the seams connection reinforcement amount and anchorage length measures to improve the bearing capacity of the splice plate, did not consider the seams cross-section is the effective height of the splice plate bearing capacity.
Analysis and calculation to be seen: Seams section effective height is an important factor to affect splicing plate flexural capacity.
Through structural measures to increase the effective height of the cross-section of seams, improve the bearing capacity of the splice plate is feasible. 5 Conclusions Composite Slab static load test, to study the bearing capacity of deformation properties of the cracks to carry out the law is the mechanical characteristics of cross-section, the necessary analysis and test results , and analysis and experimental results were compared:1) Enhance superimposed board reinforcement at the seams and anchoring measures or change Reinforced location to increase the effective height, which not only can effectively pass internal forces, also improve the stitching laminated slabs of carrying capacity, so basically reached the benchmark Slab resistance; 2)Through appropriate structural measures to increase the effective height of the cross-section of seams to further enhance splicing carrying capacity of the composite plate; 3)Rely on a patchwork force transmission, composite panels can be two-way
Online since: October 2012
Authors: Ya Hong Ding, Mei Xiang Zhang, Chun Sheng Zhang, Hui Min Hao
Introduction
The bearing capacity of the structure decreased gradually because of the various natural factors and human error, etc.
Helical rib steel wires have good properties, such as ductility, tensile and shear strength and so on.
Test mechanical properties of helical rib steel wire are shown in table 1.
Test mechanical properties of rebars are shown in table 2.
The adhesive has high tensile, good properties on impact resistance, fatigue resistance.
Helical rib steel wires have good properties, such as ductility, tensile and shear strength and so on.
Test mechanical properties of helical rib steel wire are shown in table 1.
Test mechanical properties of rebars are shown in table 2.
The adhesive has high tensile, good properties on impact resistance, fatigue resistance.
Online since: May 2006
Authors: Kwang Mahn Kim, Kyoung Nam Kim, Keun Woo Lee, J.S. Shim, W.H. Kim, Yong Keun Lee
Composite
resin veneering could be substituted for dental porcelain without the risk of deteriorating the
mechanical properties of GER coping.
The factors contributing to this failure are: the type of adhesive and the chemical stable nature of the GER restoration, the treatment of surface, and the stress undergone by the prosthesis.
In order to improve the veneer-to-metal bonding, various treatments of surfaces have been used, including those which attempted to ensure the macro-mechanical retention and the micro-mechanical retention, etching technique, sandblasting [4-6].
The ANOVA analysis indicated that the bond strengths were affected by the type of surface preparation (P<0.05).
Thermocycling, which is frequently used for evaluation of bonding durability of adhesive systems, considerably affected the strength of the bond with the noble alloys.
The factors contributing to this failure are: the type of adhesive and the chemical stable nature of the GER restoration, the treatment of surface, and the stress undergone by the prosthesis.
In order to improve the veneer-to-metal bonding, various treatments of surfaces have been used, including those which attempted to ensure the macro-mechanical retention and the micro-mechanical retention, etching technique, sandblasting [4-6].
The ANOVA analysis indicated that the bond strengths were affected by the type of surface preparation (P<0.05).
Thermocycling, which is frequently used for evaluation of bonding durability of adhesive systems, considerably affected the strength of the bond with the noble alloys.
Online since: October 2014
Authors: Jun Sheng Sun, Hong Gen Sun
The results show that the ultrasonic treatment reduces the stress concentration factor by improving the geometry of the toe of weld’ area.
It often makes some welding structure premature failure for fatigue, especially some key structures worst affected by dynamic load.
JG590 steel primary chemical composition (mass%):0.15C, 1.45Mn, 0.34Si, 0.037Nb, 0.074V, 0.010S, 0.022P, and its mechanical properties: Rp0.2=455MPa, Rm=610MPa, A5=21%, Akv(-5˚C)=141J, Akv(-20˚C)=83J.
It is an ideal welding method to improve the fatigue properties of welded joints.
(Mechanical Industry Press, China 1995)(In Chinese) [2] Gurney T R.
It often makes some welding structure premature failure for fatigue, especially some key structures worst affected by dynamic load.
JG590 steel primary chemical composition (mass%):0.15C, 1.45Mn, 0.34Si, 0.037Nb, 0.074V, 0.010S, 0.022P, and its mechanical properties: Rp0.2=455MPa, Rm=610MPa, A5=21%, Akv(-5˚C)=141J, Akv(-20˚C)=83J.
It is an ideal welding method to improve the fatigue properties of welded joints.
(Mechanical Industry Press, China 1995)(In Chinese) [2] Gurney T R.
Online since: September 2013
Authors: Juan Hua Su, Yao Min Zhu, Qiu Ran Gao, Jun Tao Zhang, Feng Zhang Ren
The results show that flow stress is significantly affected by both deformation temperature and strain rate, the flow stress increases with increase in strain rate and decreases in deformation temperature during the hot compression process.
Flow stress reflects the deformation properties and the flow stress behaviors are affected by deformation temperature, strain rates and comparative strain during hot deformation [2-4].
Recently, much work has been done on the extrusion and deformation properties of the Mg-Zn-Y-Zr alloy [5, 6].
Fig. 3 Relationship between strain rate and stress for Mg-3.5Zn-0.6Y-0.5Zr alloy Fig. 4 Relationship between peak stress and temperature for Mg-3.5Zn-0.6Y-0.5Zr alloy Zener-Hollomon parameter (Z parameter) is compensatory strain rate factor of the temperature and is the reaction of difficulty level of materials [7, 10].
Meng, Microstructures and mechanical properties of extruded Mg-8Gd-0.4Zr alloys containing Zn, Mater.
Flow stress reflects the deformation properties and the flow stress behaviors are affected by deformation temperature, strain rates and comparative strain during hot deformation [2-4].
Recently, much work has been done on the extrusion and deformation properties of the Mg-Zn-Y-Zr alloy [5, 6].
Fig. 3 Relationship between strain rate and stress for Mg-3.5Zn-0.6Y-0.5Zr alloy Fig. 4 Relationship between peak stress and temperature for Mg-3.5Zn-0.6Y-0.5Zr alloy Zener-Hollomon parameter (Z parameter) is compensatory strain rate factor of the temperature and is the reaction of difficulty level of materials [7, 10].
Meng, Microstructures and mechanical properties of extruded Mg-8Gd-0.4Zr alloys containing Zn, Mater.
Online since: August 2013
Authors: Shuo Xing, Yun Xia Wang
The edge load correction factor is introduced, and its scope is 1.0 ~ 1.2.
The BP neural network is a relatively mature and is widely applied now, and this model can fully reflect the effect the parameters of pile, the displacement rate, the physical and mechanical properties of soil and mattress layer thickness and construction technology as well as the interaction among various factors have on the bearing capacity of CFG pile composite foundation, and the various effect of composite foundation.
The traditional bearing capacity calculation formula and formal of CFG pile composite foundation, do not consider physical and mechanical properties of soil between piles after reinforcement.
Rui-jie Jia [19] (2006) found that the physical and mechanical properties of soil between piles can be improved after the soil was reinforced by CFG pile, and it will inevitably affect the bearing capacity of single pile and composite foundation.
It can consider many factors influencing the performances of the pile at the same time, such as the nonlinear of soil, the soil inhomogeneity, anisotropy, the consolidation and creep and so on.
The BP neural network is a relatively mature and is widely applied now, and this model can fully reflect the effect the parameters of pile, the displacement rate, the physical and mechanical properties of soil and mattress layer thickness and construction technology as well as the interaction among various factors have on the bearing capacity of CFG pile composite foundation, and the various effect of composite foundation.
The traditional bearing capacity calculation formula and formal of CFG pile composite foundation, do not consider physical and mechanical properties of soil between piles after reinforcement.
Rui-jie Jia [19] (2006) found that the physical and mechanical properties of soil between piles can be improved after the soil was reinforced by CFG pile, and it will inevitably affect the bearing capacity of single pile and composite foundation.
It can consider many factors influencing the performances of the pile at the same time, such as the nonlinear of soil, the soil inhomogeneity, anisotropy, the consolidation and creep and so on.
Online since: March 2013
Authors: Yong Lin Kang, Guo Ming Zhu, Xing Ye Guo
The main factor which affected the rolling force during the rolling process has been illustrated.
The changing of the friction condition could have direct compact on the rolling pressure, and at the same time it would affect the abrasion of the roller.
Conclusion The main influence factor of rolling force for large size H-Beam during the universal mill rolling was analyzed by the method of the finite element method simulation.
Simulation analysis and research of large size H-beams rolling process and microstructure property.
Chen, et al. 3D Thermal Mechanical Coupled Elasto-plastic Finite Element Analysis in the Whole Rolling Process of H-beam.
The changing of the friction condition could have direct compact on the rolling pressure, and at the same time it would affect the abrasion of the roller.
Conclusion The main influence factor of rolling force for large size H-Beam during the universal mill rolling was analyzed by the method of the finite element method simulation.
Simulation analysis and research of large size H-beams rolling process and microstructure property.
Chen, et al. 3D Thermal Mechanical Coupled Elasto-plastic Finite Element Analysis in the Whole Rolling Process of H-beam.