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Online since: October 2011
Authors: Pei Xin Wang, Tao Cui, Jing Shan Shi, Ren Ping Dai
Based on a deep foundation pit of a subway station, this paper analyzes the reason of intrusion-clearance in the process of whole construction, and the affecting degree of every factor.
All of this indicates there may have other reasons except construction factors, such as the parameters of diaphragm and the improving effect of reinforced soil.
Factors Affecting Displacement of Diaphragm Wall.
According to the above analysis and practical situation, the improving effect plays a key role on the wall displacement among all above factors.
Due to the influence of construction level and soil properties, the local experiences should be considered.
Online since: February 2019
Authors: Mikhail V. Maisuradze, Maxim A. Ryzhkov
Introduction The hardenability is one of the most critical properties of steels since it is often referred to when the suitable material should be selected for the given part or component [1…3].
Incorrect selection of the steel grade with unsuitable hardenability may cause fatal defects or poor mechanical properties of the final product [4, 5].
The main factors affecting the hardenability of the structural steels are the chemical composition, the chemical homogeneity of steel, the content of impurities and non-metallic inclusions, the austenite grain size [6].
Moreover, the massive parts of 38CrMo steel may contain sufficient amount of ferrite and pearlite in their core after the quenching causing the deterioration of the mechanical properties.
Ma, Effect of microalloying elements on microstructure and properties of quenched and tempered constructional steel, IOP Conf.
Online since: February 2007
Authors: Yu Zhou, Hua Jian Chang, Michihiko Nakagaki
The debonding parameter greatly affects both the properties for almost entire range of the particle volume fraction.
It is one of the most important factors responsible for the stiffness reduction of the composites under a static or cyclic loading [1].
Therefore, to incorporate the property and structure of interface into the evaluation on the effective properties of composites is necessary.
Material properties.
In this case the distribution factor β is fixed at 0.82.
Online since: April 2012
Authors: Qing Lian Zhang, Tao Bai
Introduction Plasma-assisted surface modification is an important material process for modifying material surface properties [1-3].
The energy of incident ions and the energy transfer are important factors in the sputter-etching process.
The change in the surface topography also affected the etching velocity.
An increased roughness affects sputter-etching yields by locally varying the angle of incidence.
The competition of these two factors explains why the dependence of the sputter-etching yield on the angle of incidence peaks at a particular incidence angle.
Online since: September 2011
Authors: Lin Wang, Ai Qin Shen, Chuan Yi Zhuang
The measured pavement responses are compared between the pavement sections to evaluate the effects of various experimental factors, such as axle load, speed, et al.
Alternating tensile and compressive strain state of the trabecular bending fatigue test results by MTS-810 test machine, it was showed that the fatigue life under tensile strain with only the conventional fatigue test results were significantly differences within tensile and compressive strain, The alternating structure of fatigue damage affecting the pavement of the most important factor.
It can be seen in different axle load levels, strain are still showing alternative tensile and compressive strain state, the maximum tensile strain and compressive strain and value of amplitude are increased with the axle load increasing, and the longitudinal value of amplitude can be referred as one of the indexes for evaluating mechanical properties.
Obviously, speed has little effected on vertical stress; it only affected lasting time of vertical stress.
It can be seen that speed significantly affect strain response at the bottom of asphalt layer, but less affect vertical compressive stress on the top of subgrade, and with the speed increases, the strain and stress response changes slowed down.
Online since: July 2011
Authors: Feng Lan Li, Xiao Yan Zhang, Qiu Yan Sun
Tests on Properties of Proto-machine-made Sand and Strength of Cement Mortar Affected by Stone Powder Xiaoyan Zhanga, Qiuyan Sunb and Fenglan Lia North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou, Henan Province 450011, P.
Based on a series tests, the properties of proto-machine-made sand of gravel such as grain feature, fineness modulus, grading, density, void ratio and MB value as well as the fineness distribution of stone powder were studied, the influences of content of stone powder on these properties of sand and strength of cement mortar were investigated.
The results are introduced in the paper, some of them contribute to explain the special properties of concrete mixed with proto- machine-made sand.
Introduction Based on the former experimental studies, the properties of proto-machine-made sand and the content of stone powder have different influences on the workability of fresh concrete and properties of hardened concrete [1-6].
Therefore, the series tests were carried out to study the inherent properties of proto-machine-made sand and stone powder, and the influences of content of stone powder on properties of sand and strength of cement mortar, the main results are introduced in this paper.
Online since: October 2014
Authors: Jin Xue Xue, Guo Hu Wang, Guo Fu Gao
Many researches reported the forming of the nano ceramics and its properties[2-5], but researches on the finishing mechanism are insufficient.
The changes of the inner micro-characters of the material under ultrasonic wave field are the important factors which affect the value of ξ [6]. ξ of common brittle material misfit the nano-ZrO2 ceramic.
Considering the factors mentioned above comprehensively, ξ in Eq.1 should be revised as
The factors that affect ξ2 may relate to the micro-change of the material constitutive relation under ultrasonic energy, which result from the change of the value of E and H.
The experiments indicate that there are a variety of factors which affect the value of ξ.
Online since: January 2006
Authors: Xin Zhu Zhou, Jia Jin Zheng, Shi Lang Xu
It is in this regard that the present paper attempts to develop a quasi-brittle mechanical model to predict crack width of chloride contaminated concrete structures.
It is also partially due to the fact that the safety factors used in structural design for strength are usually larger than those for serviceability.
Once experimental results are produced, empirical models can be readily developed for corrosion induced concrete cracking based on mathematical regression, including both deterministic models and probabilistic models [4] .The factors that affect the corrosion induced cracking have also been studied in experiments.
For example, Alonso, Andrade, Rodriguez and Diez found that, in addition to concrete properties, the corrosion rate and cover depth to bar diameter ratio are critical factors [5].
They observed the corrosion affected reinforced concrete slabs with various physical properties and dimensions till surface cracking.
Online since: June 2020
Authors: Nur Faiqa Ismail, Solehuddin Shuib, Muhammmad Aiman Firdaus Bin Adnan, Nik Ahmad Hambali Nik Abd Rashid
This surgery is done due to the several factors which are the bone is not normal position or has broken into several pieces.
For the tibia bone properties, it was search through reliable sources on the internet to get the value of its young’s modulus and Poisson’s ratio which is 7,300 MPa and 0.3 respectively [5].
Each material for sure have its own mechanical properties which is 200 GPa modulus of elasticity for stainless steel and 110 GPa for titanium alloy but offer a same value of Poisson’s ratio, 0.3.
High value of stress will affect the bone healing period since it will pressurized the pinhole area.
In addition, the high value of displacement will affecting the structure of the model where it will increase the potential to implant loosening.
Online since: September 2014
Authors: Le Zhou, Yun Hao Bai, Xiao Mei Nie
With the improvement of requirements for the building, and the effects of various factors for some existing steel structure building during the long-term service process, structural function is damaged, which requires reinforcement for existing structures to meet the requirements of its use of the function.
Introduction In recent years, with the improvement of steel production and material properties, the engineering application of steel structure is more and more widely, but the steel buildings in service are affected by the corrosive environment, design reasons, construction reasons, irregular use, etc., that structural damage is always appeared to cause that the bearing capacity is reduced and could not continue to play a stabilizing proper function because of the steel structure special material.
Development and mechanical characteristics of steel column reinforced by enclosed reinforced concrete Development.
Mechanical characteristics.
Research institutes, Xi'an University of Architecture and Technology, China Academy of Building Research, Tsinghua University, Hunan University, Southeast University and Southwest Jiaotong University have been studied successively on steel reinforced concrete structures, have proved the existence of slip between steel and concrete, and its significant impact mechanical properties of steel reinforced concrete members.
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