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Research on Nonlinear Stiffness Characteristics of Hydro-pneumatic Spring Junwei Zhang1,a, Sizhong Chen1,b, Lin Yang1,c 1School of Mechanical and Engineering Beijing Institute of Technology, Beijing, China azjw36927@163.com, bchensz@bit.edu.cn, cyanglin@bit.edu.cn Keyword: Hydro-pneumatic spring, Adjustable stiffness, Adjustable damping, Test Abstract.
Reference [1] Long-xin Zhen: Research on system simulation, optimization and design calculation of Hydro-pneumatic suspension [D], Beijing: Beijing University of Science and Technology, 2005 [2] Jianmin Sun: Research status and development of hydro-pneumatic suspension of engineering vehicle [J], Beijing, Beijing Institute of Civil Engineering and Architecture, 2007 [3] Qidong Wang, Bofu Wu and Wuwei Chen: Integrated control of automobile active suspension and electrical power steering systems based on predictive control [J], Transactions of the Chinese Society for Agricultural Machinery, 1-5. 2007 [4] Renzhi Wu: Research on system dynamics simulation and test of hydro-pneumatic suspension [D], Zhejiang: Zhejiang University, 2000
J. of Vehicle Autonomous Systems, 2003, 237-246 [6] Danling Zeng and Yue Ao: Engineering thermodynamics [M], Advanced Education Press, 2002 [7] Zhicheng Wu, Sizhong Chen and Lin Yang: Stiffness Analysis of Technology, 2005

Introduction Currently, Engineering and academic circles have different views on the function of fiber in concrete, Fiber only plays the role of the crack, the mechanics performance index no effect，others think that appropriate fiber dosage can improve compression capacity and bending capacity..
More and more engineering use polypropylene concrete can improve the concrete cracking performance; meantime improve the jet concrete one-time injection thickness.
Manual slow mixing mode was used to meet the actual engineering needs.
Experimental investigation of the performance of Plaster Mortar modified with Polypropylene fiber, Journal of Quality of Civil Engineering and Construction,.2006(8):23-27.

Analysis of the Influences of soil parameters on the settlement of storage tank foundation Zhang Xudong1, a, Wang Shuai1, b, Yu Rangang1, c 1Department of Civil Engineering, China University of Petroleum, Qingdao China,266555 azxd001@upc.edu.cn, b darkblue2009@126.com, c yrangang@163.com Keywords: storage tank; numerical simulation; post-construction settlement; soil parameters Abstract: The settlement characteristics of storage tank foundation at water-filling preloading stage and stable loading stage was analyzed based on numerical simulation.
References [1] Specification for design of steel storage tanks subgrade and foundation in petrochemical industry(SH/T3068-2007), National Development and Reform Commission,(2007.10) [2] JiaQingshan:Storage tank Foundation Engineering Handbook[M](CHINA PETROCHEMICAL PRESS, BeiJing 2002)
[4] Zhao Tongshun,ZhouBo,DEFORMATION BEHABIOUS OF SOFT FOUNDATION UNDER LARGE OIL TANK[J],chinese Journal of Rock Mechanics and Engineering,(2004.03)
[5] Wang Jun,Chen Yunmin,One-dimensional consolidation of thick structural soft clay ground[J], Journal of Geotechnical Engineering,(2002.09)

The design and realization of control system for underwater vehicle Zhijie Tang1, a, Wang Shuai1,b ,Shen Jiali1,Luo Jun1 1 School of Mechatronics Engineering and Automation, Shanghai University, Shanghai, China atangzhijie@shu.edu.cn, bsu2007-116@163.com Keywords: underwater vehicle, hardware design, software design; Abstract.
Underwater vehicle, especially for shallow water will play a very important civil and military role in monitoring services for dams, nuclear power plant and offshore drilling platforms, and detection and removal hazardous goods.
Proceedings of SPIE - The International Society for Optical Engineering, v 7336, 2009
International Journal of Maritime Engineering, v 150, n 2, p 1-11, 2008 [6] Silvia M Zanoli, Giuseppe Conte .Remotely operated vehicle depth control, Control Engineering Practice，Vol.11, 2003: 453-459

Experimental Study of Mechanical Property of a New Lightweight Composite Floor Bing Shaoa, Zhengjue Huangb and Xintang Wangc Department of Civil Engineering, Ningbo University, Ningbo 315211, China a504939591@qq.com, bjohnhuang@qq.com,cyy196878@126.com Keywords: Lightweight Concrete; Composite Floor; Thin-walled Steel Beam; Mechanical Property; Experimental Study Abstract.
The floor studied in this paper is an new composite floor which may play action of cold-formed steel and lightweight aggregate concrete, the research results presented here may be used as basis of engineering design.
Deam: Engineering Structures Vol. 33(2011), p.2697 [7] L.F.Jorge, J.Schänzlin, S.M.R.Lopes, H.
Kuhlmann: Engineering Structures Vol. 32(2010), p.3966 [8] U.

Nomo-graph for Determining the Effective Length of Columns with the Leaning Columns Yao Zheng1, a, Donghua Zhou1,b, Zhilun Ouyang1,c, Jinglin Zhu1,d and Chunxiu Han2,e 1School of Civil Engineering, Kunming University of Science and Technology Kunming, 650500, China 2Faculty of Architectural Engineering, Kunming Metallurgy College, Kunming, 650033, China a871022054@qq.com, bstahlverbundbau@yahoo.com.cn, c25172706@qq.com, d417035235@qq.com, e593416010@qq.com Keywords: columns, effective length, leaning columns, stability, chart method Abstract.
According to the Fig.1, we analyze the stress of the structure systems, the shear of the nodal can be expressed as follows: ,.Substituting them into the Eq.5 gives the following equation: (6) To simplify the above formulas, the stability equation we can get the following: (7) The stability equation is a transcendental equation, no analytical solution, solving this problem is very difficult in the practical engineering application. andare unknown, there are two unknown variables in the equation, this equation cannot be solved.
It is shown that the results from the method in the paper have better precision,which is easy to be applied and reference in engineering.

The hanging point of the spatial grid structure high strength bolt fatigue notch effect analysis XiaoLong Wang 1, a, HongTtao Luo1, b 1 Department of Civil Engineering, Taiyuan University of Technology79, Yingzexi Street, Taiyuan, 030024, China a525783568@qq.com, b496883713@qq.com Key words: spatial grid, hanging point, high strength bolt, fatigue Abstract: In recent years, the advantages of light weight steel structure with its widely used in long-span space truss structure industrial workshop.
Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE[J], Materials Engineering ,p 875-881, 1993
Chen: (Beijing Institute of aeronautical materials).Theoretical stress concentration factor and fatigue notch factor Kf Kt between [J].Materials engineering., 2007 (07) [5] GB/T 5782-2000, Hex head bolts [S] (China architecture & building press, Beijing, 2000).

Study on Base Body of Vegetable Concrete Huajian Li1,a, Henghu Sun1 , Xuejun Xiao2 and Xuchu Tie2 1 Department of Material and Engineer, Tsinghua University, Beijing 100084, China 2 Department of Resources China University of Mining & Technology (Beijing), Beijing 100083, China a lihuajian03@mails.tsinghua.edu.cn Key words: Self-adaptive, Vegetable concrete, Base body Abstract.
Self-adaptive vegetable concrete is not only can meet demands of growth environment of plant such as flowers and plants, but also has mechanics performance of the concrete basic performance as civil engineering material.
Engineering Association of Japanese put forward the concept of the Ecological Concrete (Environmentally Friendly Concrete/Eco-concrete) in 1995.
The based body of vegetable concrete has enough space structure for root growth of the vegetation and enough compressive strength fit to the engineering material.

The Comparison of the Cantilever Truss Node Displacement Calculation Methods Shasha Wu 1,a, Dongsheng Gu1,b, Xiaojie Gu1,c, Taiquan Zhou1,d School of Environment and Civil Engineering, Jiangnan University, Wuxi, China, 214122 aqushuishangshang@126.com, b gussds@jiangnan.edu.cn (corresponding author), c416704023@qq.com , d846158321@qq.com Keywords: Truss structures; Hand computation; Structural mechanics solver ; ANSYS; SAP2000 Abstract: In this paper, some popular software, such as structural mechanics solver, ANSYS and SAP2000 are used to calculate the deformation of truss structure under statics loading.
So in the engineering, hand calculation precision is enough.
Therefore, it is reasonable to simplify truss model to hinge joint case in the structural calculation and in accordance with the engineering practice.
Articulated and rigid connection model on the influence of steel truss beam design.Waterway Engineering, 2011(S1)

Stress Analysis of steel Pipelines Strengthened by CFRP Sheet Muyi Hou1, a, Bin Jia1, b, Shunfeng Liu1, c , Xiaoqiang Chen1, d 1School of civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, China a1278880417@qq.com, bjiabin@swust.edu.com, c306443578@qq.com, dchenxiaoqiang@swust.edu.com Keywords: CFRP sheet, Steel Pipelines, Lame equation, Stress Abstract.
Guide for Construction and Engineering of Stuctural Concrete Reinforecd with FRP.
Engineering Failure Analysis, 1988, 5(3): 205-218
Engineering Failure Analysis, 2001, 8(1): 57-73