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Analysis of particle crushing in rolling compaction for rockfill dam using DEM Yang Liu1, a, Yantao Wang2,b and Xiaozhu Li2,c 1Department of Civil Engineering, University of Science and Technology Beijing, 100083, China 2Wuhan Surveying-Geotechnical Research Institute Co., Ltd.
Introduction Grain crushing is a common phenomenon in geotechnical engineering such as water conservancy, ports, transportation, etc.
Chinese Journal of Geotechnical Engineering, 19(3),(1997),p.83
Journal of Engineering Mechanics, ASCE, 124(3),(1998), p. 285
Chinese Journal of Rock Mechanics and Engineering,30(11),(2001), p.2113.

The main results show: the resilience models of high-strength concrete frame columns proposed in this paper consider influenced multi-facts and conveniently applied to engineering.
Introduction In the past more than half century, seismic engineering group at home and abroad carried out abundant experimental research on resilience property of ordinary-strength concrete (OSC) components and offered multifarious resilience models[1,2].
Conclusions The resilience models of high-strength concrete frame columns proposed in this paper consider influenced multi-facts and conveniently not only reflect practical engineering but also areconveniently applied to engineering computation.
Civil Engineering Journal, 2004, 37(5): 32-38.

A Method of Determing Dynamic Stability Critical length of Construction Member Qiang Sun1,a,Congcong Guan1,b 1School of Civil Engineering of Anhui Institute of Architectural and Industry, Hefei,Anhui,230601,China asunqiang@aiai.edu.cn,bcivilguan@163.com Keywords: Dynamic stability,construction member,the parameters of vibration,critical length, principle of elasticity stability.
The paper puts forward some related measures for reducing vibration of rod, and may provide reference values for the design and analysis of engineering.
The notion of dynamic stability is confused with that of dynamic bucking frequently.At present,we still lack an appropriate and accurate method to design or analyze practical engineering problems like the dynamic stability subjected to dynamic load.
The paper puts forward some related measures for reducing vibration of rod, and may provide reference values to the design and analysis of engineering.
Hence in dynamic designing and analysis of rods,corresponding corrective in technology must be done according to various surroundings of engineering, to insure that the rod is out of the resonance region.

Analysis of Effective Pre-stress of Continuous Rigid Frame Bridge in Service Based on Inversion Theory Zhaoning Zhang1,2,a, Kexing Li3,b 1School of Civil Engineering, Lanzhou University of Technology, Lanzhou, 730050, China 2School of Highway, Chang’an University, Xi’an, 710064, China 3Department of Bridge Engineering, Shaanxi Railway Institute, Weinan, 714000, China azhangzhn@lut.cn, bbeifang4801@sohu.com Keywords: Rigid Frame Bridge, Effective Pre-stress, Deflection, Inversion Theory, Analysis Abstract.
It is important for engineers to track the state of the pre-stress in order to ensure security of the bridge in service.
But the research on the effective pre-stress is still not solved completely for the pre-stressed concrete bridge during construction and operation in China and other countries, how to accurately predict and measure the effective pre-stress has important engineering significance.
References [1] REN Cha-xian, ZHU Run-xiang: Engineering Mechanics Vol. 17(4) (2000), p. 138-144 [2] ZHANG Yuan-hai, LIU Shi-zhong: China Journal of Highway and Transport Vol. 15(2) (2002), p. 76-78 [3] CHENG Shou-shan, LI Xing-qing, YU Gang-qin: Journal of Highway and Transportation Research and Development Vol. 23(4) (2006), p. 71-73 [4] WANG Jin-feng, XIANG Yi-qiang, XU Xing: Journal of Zhejiang University (Engineering Science) Vol. 39(1) (2005), p. 154-159 [5] WANG Jin-feng, XIANG Yi-qiang, XU Xing: Chinese Journal of Computational Mechanics Vol. 24(4) (2007), p. 459-463 [6] LI Qing-fu, XIN Bao-bing, LI Ke: Journal of Zhengzhou University (Engineering Science) Vol. 32 (1) (2011), p. 18-21 [7] YUAN Yong, SUN Jun: Chinese Journal of Geotechnical Engineering Vol. 16(2) (1994), p. 29-36 [8] ZHANG Lu-qing, JA Zheng-xue: Chinese Journal of Geotechnical Engineering Vol. 23(2) (2001), p. 172-177 [9] ZHAO Bing, SHENG Guo-gang, LI Ning: Chinese Journal of Rock Mechanics and Engineering
Vol. 23(7) (2004), p. 1146-1149 [10] SUN Xue-xian, ZHANG Hui: Engineering Mechanics Vol. 24(12) (2007), p. 135-138

Energy savings in a system using evaporative cooling and radiant air condition Xiang Huang1,a, Xiaoli Zheng2,b, Qinghai Yin3,c School of Environmental & Chemical Engineering, Xi’an University of Polytechnic Shanxi, Xi’an, 710048, China ahuangx@xpu.edu.cn, bzflqzxl@163.com, cyinqinghai626@126.com Keywords: radiant cooling evaporative cooling energy saving design Abstract.
In order to analyse the potential of reducing energy consumption of the system ,which based on evaporative cooling and radiant air condition in civil building.In this paper, firstly, calculated cooling load of a office building in Xinjiang, China.Then analysed and compared the design methods, operating cost and investment cost of three semi-central air conditioning systems.
Engineering Introduction This project is a office building of in Xinjiang, total area is 5100m2Take the meteorologic parameter of Changji hui autonomous prefecture as outdoor design conditions[5,6,7].See Table 1: Table 1 Outdoor design conditions in summer Dry-bulb temperature[℃] wet-bulb temperature[℃] Dewpoint temperature[℃] Enthalpy [kJ/kg] Moisture content[g/kg] 32.7 19.7 13.3 59.12 10.19 There are three systems ,include evaporative cooling&fan coil(program1),evaporative cooling& radiant air condition(program2),primary air fan-coil system(mechanical refrigeration&fan coil)(program3).And there are two types of parameters.Design dry-bulb temperature is 25℃ and relative humidity is 60% in program 1 and program 3.Design dry-bulb temperature is 27℃ and relative humidity is 60% in program 2.
[5] Central Engineering Institute for Non-ferrous Metallurgical Industries HVAC regulation management group.
[6] Xiang Huang ,Air conditioning engineering ,(China Machine Press ,Beijing, 2006),in Chinese

Parametric Analysis on Flexural Capacity of Flange-Plate Connections Considering Prying Force Yuanqing Wanga, Liang Zongb and Yongjiu Shic Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing 100084, China awang-yq@tsinghua.edu.cn, bzongliang06@gmail.com, cshiyj@tsinghua.edu.cn Keywords: Flange-Plate Connection, Bending Moment, FEM, Prying Force, Parametric Analysis Abstract.
The conclusions from this paper can provide references for Engineering Design.
The conclusions can provide references for engineering design.
According to engineering practice, the common material of flange-plates and tubes is Q235B or Q345B.

Civil, Materials and Manufacturing Engineering, Escuela de Ingenierías Industriales, Universidad de Málaga, Andalucía Tech, Campus de Teatinos, 29071 Málaga, España ajsolano@uma.es, bsmartinb@uma.es, cjmcanero@uma.es, dlsevilla@uma.es Keywords: Operational Procedures, Oxygen-arc Cutting, Underwater Welding, Professional Diver, Underwater Risks.
It is carried out in both fresh and salt waters and encompasses such disparate tasks that professional diving is currently present in numerous productive sectors: hydrocarbon extraction, offshore platforms, port maintenance, public works, civil engineering, infrastructure hydraulic, power plants (hydroelectric, thermal and nuclear), shipbuilding, underwater construction, aquaculture, ship and boat salvage, NDT filming and reporting, teaching and training, and scientific research (geological, biological, archaeological, etc.).
Maeso, Modelling for implantation of the systems preventive management in the singular sectors. 7th International Conference on Industrial Engineering and Industrial Management.

Study on the Shear Strength Parameters under Different Freezing and Thawing Cycles of Soil Slope in China WU He1,2,a, GE Qi2,b, TIAN Jingbo3, c 1 Graduate School of China University of Geosciences, Wuhan, China 2 College of Architectural and Civil Engineering, Heilongjiang University, Harbin, China. 3Institute of Engineering mechanics China Earthquake administration, Harbin, China a hgcwh@163.com; b geqibest@163.com; c.jddaoqiao@163.com Key words: road engineering; deterioration model; freezing and thawing surface; shear strength; seasonal frozen regions Abstract: In seasonal frozen regions, shallow landslide hazards in soil slopes usually happen.
Chinese Journal of Geotechnical Engineering, 12, 1766-1770

Gob area grouting reinforcement Huiren Bai1,a, Jingjing Li1,b,Dan Wang1,c 1Dalian University Civil Engineering College, Dalian 116622, China abhr60@163.com, bjingjing_li_long@163.com, cfala2013W@163.com Keywords: Gob; GTS; grouting Abstract.
Combined with the engineering example, the use of GTS software to identify mined areas and the the drilling histogram to establish three-dimensional geological model of gob region.
Along with the development of the national economic construction and national integration of urbanization, more and more engineering projects and infrastructure are involved in gob area.
Yu, Engineering Survey, 10 (2009) 9-11
Wang, West-China Exploration Engineering, 8 (2012) 194-195

Early presumption on the 28d Strength of cement-clay composite powder Mixed Mortar Jun XIE 1, a, Jie Yan1,b, Xuying Fan1, c, Jingyu Zhang2,d, Yongfeng Xu1, e 1 Hebei Institute of Architecture and Civil Engineering, Zhangjiakou, Hebei, 075000, China 2Petrochina Jilin Petrochemical Company Ethylene Glycol Factory, Jilin, Jilin, 132021, China axiejun79@126.com, byanjie6253@126.com, c75950921@qq.com,dhongseguoji@sina.com, ehh-0002@163.com Keywords: Cement-clay composite powder;Mixed Mortar;Scale Strength;early presume Abstract.Based on the mixing ratio design of the cement-clay composite powder mixed mortar ,in this article，the 28d strength was early presumed by the 7d strength;by the method of mathematical statistics, different regression equations were established and the results were compared,which indicated that exponential equation had a better stability;the early presumption of 28 day strength of cement-clay composite powder Mixed Mortar provided a scientific basis for engineering
Using the strength relationship of the exponential equation, the maximum error between 28d strength inferred from the 7d strength and the real 28d compressive strength was 0.6 MPa, meeting the requirements of engineering.
Using this formula, 28d strength can be inferred from 7d strength, which had small error compared with the specimen’s actual 28d strength at standard curing 28d, and met the requirements of engineering. 2） Good applicability.
In the preparation of cement - clay composite powder mixed mortar, when types of raw materials, cement grade, and the mixing ratio of the material changed, the performance of the exponent equation of the strength relationship was stable. 3） The 28d strength was presumed by 7d strength, greatly reducing the design age of cement - clay composite powder mixed mortar mix, providing a scientific basis to engineering practice , to ensure the quality of the project and accelerate the construction schedule.
References [1] Wang Lixin, Xue Bin .Hebei Institute of Architectural Engineering, Vol. 2 (2005),P.67 [2]V.Sata,C.Jaturapitakkul,and K.Kiattikomol.Utilization of palm oil fuel ash in high-strength concrete.Mater.