作者机构:
[Nie, Chunlong] Univ S China, Sch City Construct, Hengyang, Hunan, Peoples R China.
通讯机构:
[Nie, Chunlong] U;Univ S China, Sch City Construct, Hengyang, Hunan, Peoples R China.
会议名称:
International Conference on Structures and Building Materials
会议时间:
JAN 07-09, 2011
会议地点:
Guangzhou, PEOPLES R CHINA
会议主办单位:
Univ S China, Sch City Construct, Hengyang, Hunan, Peoples R China.
会议论文集名称:
Advanced Materials Research
关键词:
large deformation;radius of expanding pore;limit expansion pore pressure;excess pore water pressure;saturated soil
摘要:
Soil around the cylindrical pore is divided into elastic and plastic regions. In the elastic region, the small deformation theory is applied while in the plastic region, the large deformation theory and unified strength criterion are applied. According to the stress equilibrium equation and the boundary condition of continuous stress and deformation, the theoretical solution to plastic region radius, limit expansion pore pressure excess pore pressure and excess pore water pressure of the cylindrical cavity expansion can be derived when considering large deformation and non-drainage problems. Compared to the theoretical results of Cao L.F., the theoretical calculation results are closer to the field test results which show that the theory has a certain value in engineering application. Through calculations and analysis, it is also derived that expansion pore pressure increase is non-linear with the increase of b value, while the excess pore water pressure is just the opposite.
摘要:
Taking the heterogeneity character of concrete into account, this paper presents an equivalent probabilistic model for failure study of concrete in which the heterogeneity of concrete is considered by assuming that the material properties conform to the Weibull distribution law and by using mesoscale mesh of finite elements. The study is divided into three parts. In the first part, a spatial correlation length factor is developed into the Weibull distribution formula so that the spatial correlation of local continuity of material properties can be considered. The second part presents a series of numerical analyses for investigating the size effect of self-compacting concrete (SCC) based on the equivalent probabilistic model, and a comparison is made between the simulation results and compression test measurements for illustrating the size effect on uniaxial compression strength and failure pattern of the SCC concerned. It is shown that the numerical model can provide reasonable predictions in the analysis of the size effect of SCC. In the final part, as an engineering application of the presented model, the damage and fracture behavior of the Koyna gravity dam during the 1967 earthquake are analyzed. Influences of concrete parameters on the crack pattern and failure modes of the dam prototype during the event are discussed. DOI: 10.1061/(ASCE)MT.1943-5533.0000179. (C) 2011 American Society of Civil Engineers.
作者机构:
[Luo, Qinghai; Zhang, Pengfei] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.;[Peng, Wenwu] Hunan Vocat Coll Technol Econ & Commerce, Hengyang 421001, Peoples R China.
通讯机构:
[Luo, Qinghai] U;Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议名称:
2nd International Conference on Manufacturing Science and Engineering
会议时间:
APR 09-11, 2011
会议地点:
Guilin, PEOPLES R CHINA
会议主办单位:
[Luo, Qinghai;Zhang, Pengfei] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.^[Peng, Wenwu] Hunan Vocat Coll Technol Econ & Commerce, Hengyang 421001, Peoples R China.
会议论文集名称:
Advanced Materials Research
关键词:
CNC Vertical Boring-milling Machine;Rigidity of Principal Axis;Structure Improvement
摘要:
The rigidity of the principal axis of a CNC vertical boring-milling machine was analyzed, and the belt tension and end deformation were also calculated. A project was proposed to improve the structure of the principal axis for finish machining. After the discharge belt pulley was applied on the principal axis, the force transmission and the rigidity of principal axle system were improved considerably. The design and process means were proposed for the three added parts of the improved structure. The improved structure is simplified, secure and low-cost. The machining precision was increased, and the fixing was also become convenient.
期刊:
Advances in Intelligent and Soft Computing,2011年108:261-267 ISSN:1867-5662
通讯作者:
Duan Qiongjing
作者机构:
[Duan Qiongjing] Univ South China, Acad Adm, Hengyang 421001, Hunan, Peoples R China.;[Liu Jinxiang] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
通讯机构:
[Duan Qiongjing] U;Univ South China, Acad Adm, Hengyang 421001, Hunan, Peoples R China.
会议名称:
2nd International Conference on Education and Educational Technology (EET 2011)
会议时间:
OCT 01-02, 2011
会议地点:
Chengdu, PEOPLES R CHINA
会议主办单位:
[Duan Qiongjing] Univ South China, Acad Adm, Hengyang 421001, Hunan, Peoples R China.^[Liu Jinxiang] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议论文集名称:
Advances in Intelligent and Soft Computing
关键词:
Experimental teaching;monitory control system;quality
摘要:
As for the factors influencing the experiment teaching quality, this paper gives an analysis to the problems in the quality control system in experimental teaching. Combining with the characteristics of our university’s experimental teaching and the management practice, we have made an active exploration on the construction and optimization of quality monitoring system during the process of the experiment teaching, and put forward ourselves’ monitoring indicator of quality control system and gained ideal results in practice.
作者机构:
[Yang Jing; Song Jina; Lv Zhiwei; Du Kun] Hebei Univ Engn, Inst Urban Construct, 199 GuangMing St S, Handan 056038, Hebei, Peoples R China.;[Du Jiyong] Handan Polytech Coll, Handan 056038, Hebei, Peoples R China.;[Xie Shuibo] Univ South China, Sch Urban Construct, Hengyang 421001, Hunan, Peoples R China.
通讯机构:
[Yang Jing] H;Hebei Univ Engn, Inst Urban Construct, 199 GuangMing St S, Handan 056038, Hebei, Peoples R China.
会议名称:
2011 International Conference on Environmental Biotechnology and Materials
Engineering(2011年环境生物技术与材料工程国际会议)
会议时间:
2011-03-26
会议地点:
哈尔滨
会议主办单位:
Harbin Univ Commerce
会议论文集名称:
2011 International Conference on Environmental Biotechnology and Materials
Engineering(2011年环境生物技术与材料工程国际会议)论文集
关键词:
Adsorption;Citrobacter freudii;Uranium
摘要:
Biosorption has been developed as an effective and economic method to treat wastewater containing low concentrations of metal pollutants. In this study, a bacterium, Citrobacter freudii, was used as a biosorbent to adsorb uraniumions. The factors which influence the adsorption of uranium by Citrobacter freudii were investigated, including pH, the strain dosage and the initial concentrate of uranium. The results showed that the adsorption efficiency increased with the increased of pH in the beginning of the adsorption and reached its maximum at pH 6; when the strain dosage and the initial concentrate of uranium were 6.0g/L and 20mg/L, respectively, the adsorption efficiency reached 93.89% and 94.68%, respectively. The authors investigated the active sites of bacteria for biosorption and the results proved that carboxyl in the cell wall played an important role in biosorption.
作者机构:
[Luo, Qinghai; Zhang, Pengfei] Univ S China, Sch Urban Construct, Hengyang 421001, Peoples R China.;[Peng, Wenwu] Hunan Vocational Coll Technol, Econm & Commerce, Hengyang 421001, Peoples R China.
通讯机构:
[Luo, Qinghai] U;Univ S China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议名称:
International Conference on Chemical Engineering and Advanced Materials
会议时间:
MAY 28-30, 2011
会议地点:
Changsha, PEOPLES R CHINA
会议主办单位:
[Luo, Qinghai;Zhang, Pengfei] Univ S China, Sch Urban Construct, Hengyang 421001, Peoples R China.^[Peng, Wenwu] Hunan Vocational Coll Technol, Econm & Commerce, Hengyang 421001, Peoples R China.
会议论文集名称:
Advanced Materials Research
关键词:
Biomass Materials;Energy Saving and Co2 Emission Reducing;Heat Insulation;Rural Buildings
摘要:
Heating energy consumption of rural buildings in China was analyzed in this paper. Thermal insulations were compared between some kinds of biomass and fossil materials. Application forms of biomass materials were discussed for heat insulation in rural buildings, and the potential was analyzed for energy-saving and CO2-emission-reducing. As a big agricultural country, the benefit and potential of biomass materials may be remarkable in heat insulation in rural buildings in the light of local conditions.
作者机构:
[Gu, Weili] Cent S Univ, Sch Energy & Power Engn, Changsha, Hunan, Peoples R China.;[Liu, Yuanquan; Gu, Weili] Univ South China, Dept Urban Construct, Hengyang, Hunan, Peoples R China.
通讯机构:
[Gu, Weili] C;Cent S Univ, Sch Energy & Power Engn, Changsha, Hunan, Peoples R China.
会议名称:
1st International Conference on Civil Engineering, Architecture and Building Materials (CEABM 2011)
会议时间:
JUN 18-20, 2011
会议地点:
Haikou, PEOPLES R CHINA
会议主办单位:
[Gu, Weili] Cent S Univ, Sch Energy & Power Engn, Changsha, Hunan, Peoples R China.^[Gu, Weili;Liu, Yuanquan] Univ South China, Dept Urban Construct, Hengyang, Hunan, Peoples R China.
会议论文集名称:
Advanced Materials Research
关键词:
Entropy production rate;Finite time thermodynamics;Flow process;Hot oil;The organic heat transfer material heater
摘要:
Analyses the flow process of hot oil in the organic heat transfer material heater based on finite time thermodynamics for the first time, obtains the entropy production rate which includes entropy production rate of dissipation effect and entropy production rate of potential difference, analyses the influence of flow pattern, physical parameters, structure and operation of the organic heat transfer material heater on the entropy production rate of dissipation effect, illustrates the influence of related parameters including Renold number, velocity, viscosity and pipe diameter on the entropy production rate of dissipation effect, and points out the type of hot oil must be considered to decrease the entropy production rate of dissipation effect and the velocity must be control under the premise of avoiding overheat.
摘要:
Based on long-term testing and recording of room temperate in a bedroom of residential buildings in the hot summer and cold winter zone, this assay focuses on comparative analysis of tested results and simulated results derived from the DeST software. It verifies the rationality and reliability of the DeST software, showing the feasibility that software DeST can be applied to analyze the energy consumption of residential building in hot summer and cold winter zone.
摘要:
The effect of masss of natural diatomite, initial dye concentrations, pH and temperature on adsorption was investigated. The adsorption of reactive dye was slightly increased then decreased with rising amouts of natural diatomite that is increasing competition of natural diatomite. The removal rate of reactive black increase with the temperature because of endothermic reaction. The removal rates of reactive black from solution were decreased as the pH increase and gain the maximum in low pH. The removal rate for all concentrations were rapid at initial stages and then keep increase gradually until the progress until equilibrium reached.
摘要:
Solidified dredged materials as environment-friendly materials in construction domain are increasingly popular because of their better mechanical performance and low pollution. Based on the physical characteristic of dredged marine sediments, a series of tests, such as unconfined compressive strength test and tensile strength test, were performed to explore the mechanical properties of cement/lime-fly ash treated sediments for the beneficial use in road construction. Finally, the reinforcement mechanism of solidified sediments was explored by SEM tests from the point of view of the formation of CSH phases and the change in microstructure.
作者机构:
[陈晓斌; 王启云; 张家生] School of Civil Engineering and Architecture, Central South University, Changsha 410075, China;[熊智彪] School of Urban Construction, University of South China, Hengyang 421001, China
通讯机构:
School of Civil Engineering and Architecture, Central South University, China
作者机构:
[Yao, Lin; Wan, Fen; Liu, Zhenhao; Xie, Jingfang; Peng, Xiaoyong] School of Urban Construction, University of South China, No.28 Changsheng West Road, Hengyang, 421001, China
关键词:
Air Distribution;Large Space Building;Numerical Simulation;Poison Gas Diffusion
摘要:
The numerical simulation of indoor airflow and poison gas diffusion and transport process is given for different air systems of air-conditioning in large space buildings in this paper. The numerical results show that the poison gas diffusion is affected by indoor airflow, and the variety air systems make the characteristics of poison gas diffusion differently. After arriving at the air return, the poison gas will soon be sprayed from the air inlet of the air system to the whole space which is serviced by the air system.
通讯机构:
[Zhang, Jie] U;Univ S China, Sch Urban Construct, Changsha 421001, Hunan, Peoples R China.
会议名称:
International Conference on Green Building, Materials and Civil Engineering (GBMCE 2011)
会议时间:
AUG 22-23, 2011
会议地点:
Shangri La, PEOPLES R CHINA
会议主办单位:
[Zhang, Jie;Liu, Zehua;Liu, Yuanquan;Li, Huimin;Ning, Yongfei] Univ S China, Sch Urban Construct, Changsha 421001, Hunan, Peoples R China.
会议论文集名称:
Applied Mechanics and Materials
关键词:
Deposition;Numerical simulation;Particle;Volume surface ratio of duct
摘要:
This paper discusses particle deposition in rectangle air-conditioning duct using RSM (Reynold Stress Model) and random trajectory particle model. Particle with nominal diameters of 10-200 mu m are simulated at each of three nominal air speed: 4m/s, 6m/s and 8m/s, respectively, in the cross-section sizes of 160x120, 500x250, 1000x320mm In simulation, the paper compares and analyzes the influence factors of particles deposition in volume surface ratio of the given duct. The results show that: 1) particle deposition velocity increases with volume surface ratio; 2) As the inlet air speed increasing, when the particles deposited to floor and vertical wall, the image of dimensionless deposition velocity Vs dimensionless relaxation time shows a coincident trend when the duct cross-section sizes are 500x250, 1000x320mm, but has great differences with the image of 160x120mm.
摘要:
The adsorption of chromium (VI) ions from aqueous solution by ethylenediamine-modified cross-linked magnetic chitosan resin (EMCMCR) was studied in a batch adsorption system. Chromium (VI) removal is pH dependent and the optimum adsorption was observed at pH 2.0. The adsorption rate was extremely fast and the equilibrium was established within 6-10 min. The adsorption data could be well interpreted by the Langmuir and Temkin model. The maximum adsorption capacities obtained from the Langmuir model are 51.813 mg g(-1), 48.780 mg g(-1) and 45.872 mg g(-1) at 293, 303 and 313 K, respectively. The adsorption process could be described by pseudo-second-order kinetic model. The intraparticle diffusion study revealed that film diffusion might be involved in the present case. Thermodynamic parameters revealed the feasibility, spontaneity and exothermic nature of adsorption. The sorbents were successfully regenerated using 0.1 N NaOH solutions. (C) 2010 Elsevier B.V. All rights reserved.
作者机构:
[肖潇] School of Urban Construction, Nanhua University, Hengyang 421001, China;[关富玲; 程亮] Space Structures Research Center, Zhejiang University, Hangzhou 310058, China
通讯机构:
[Xiao, X.] S;School of Urban Construction, Nanhua University, China