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Flexural Capacity of Concrete Beams Prestressed with Carbon Fiber Reinforced Polymer (CFRP) Tendons Xiuli Du1, a, Zuohu Wang1,b and Jingbo Liu2,c 1 The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China 2 Department of Civil Engineering, Tsinghua University, Beijing 100084, China aduxiuli@bjut.edu.cn, bwangzuohu@emails.bjut.edu.cn, c liujb@tsinghua.edu.cn Keywords: CFRP; prestressed; concrete beams; flexural capacity; ductility Abstract.
However, FRPs are brittle linear materials, which will lead to the brittle failure modes of FRP prestressed concrete beams.
Materials properties.
After analyzing the existent performance indices, Feng proposed new deformability indices for various load-deformation curves of members made of new materials [8].
Grace: PCI Journal Vol. 45 (2000), p.84 [8] Peng Feng, Lieping Ye, Yuli Huang: Engineering mechanics Vol. 22 (2005), p.28 (in Chinses) [9] ACI committee: Prestressing concrete with FRP tendons (IHS, USA 2004) [10] Aravinthan T, Mutsuyoshi H: Transaction of the Japan concrete institute Vol. 19 (1997), p.225 [11] Dolan C W, Burke C R: Flexural strength and design of FRP prestressed beams (Proceedings of the second international conference on advanced composite materials in bridges and structures (ACMBS2), Montreal 1996)

It is inspired by a fixture from a standard of the American Society for Testing and Materials (ASTM) which is used for testing notched specimens when characterizing the shear properties of composites [9].
I would also like to thank Max Böhnke and Christian Bielak from the Laboratory for Material and Joining Technology, Department of Mechanical Engineering, Paderborn University for providing a rotated clinched joint model and a material card.
Groll, Automated joining element design by predicting spot-weld locations using 3D convolutional neural networks, 2020 IEEE International Conference on Engineering, Technology and Innovation (ICE/ITMC)
Tröster, Load Path Transmission in Joining Elements, Key Eng.
[9] Standard Test Method for Shear Properties of Composite Materials by the V-Notched Beam Method.

Ltd, Hangzhou, China apanxw@zstu.edu.cn, bfulijun@qq.com, cwym@zjcps.com Key words: product family, product lifecycle management, information integration model.
Related objects include all engineering objects and management objects, such as products, assemblies and parts, documentations, projects, tasks and equipments, etc, which have corresponding property sets.
Such logic relations is embodied in BOM (Bill of Material), product classification tree, project classification tree in the product lifecycle phases.

Analysis of the Urban Environment Needs Based on the Residents’ Perspective Yongchun Wu1, a, Xinkui Liu1, b, Lianfeng Xu2, c 1 School of Urban Economics and Public Affairs, Capital University of Economics and Business, Beijing 100070, China 2School of Safety & Environment Engineering, Capital University of Economics and Business, Beijing 100070, China ay-chwu@163.com, blxk660@sina.com, cx-lf@163.com Keywords: Residents, Urban Environment, Needs Abstract.
Athens Charter (1933) also stressed that "For the workers engaged in urban planning, the needs of people and value measurement starting from people is the key to the success of all construction work."
For this, city should build good public environment and space, equipped with the corresponding service facilities, increase the opportunity of public participation, create social interaction place for residents, Rich people life, improving people contacts, make people produce close move, kindness, so as to promote people's cheerful spirit.[3] Sixth, Appropriate life The complete infrastructure facilities are the vector of the normal operation of the urban economic, political, cultural, are also indispensable material conditions.

Simulation of Flow Field and Temperature Tield in the Process of Filling and Solidification for K424 Alloy Thin-walled Casting Xin Wang 1,a, Zhijun Zhang 2,b 1Academy of Human Sports Science in Shenyang Physical Education Institute, Liaoning Shenyang, China,110102; 2Institute of Mechanical Engineering and Automation in Northeastern University, Liaoning Shenyang, China, 110004; ashin_wang@163.com, b working_zhang@163.com Key words: K424 alloy; thin-section casting; flow field simulation; temperature field simulation Abstract: In order to improve the utilization of K424 alloy, Z-Cast analysis software is used to get three-dimensional flow field and temperature coupling simulation in the process of K424 alloy castings filling, by considering the effection of pouring temperature, casting speed, shell thermal conductivity and temperature on the morphology of filling.
In the process of filling the mold, the molten metal stop flow when filling calculated to 53% ,and the time is0.718s;After the improvement of process program , the flowing front has arched shape only in the beginning moment of filling, then showed a steady advance form, and the temperature gradient is small, the total filling time is 0.863s.Can be seen from the figure of simulation results, the casting process has great impact on the flowing property of the alloy when the shell material is definite.

On Campus Communication - Take South China University of Technology for Example Ju Xue College of Civil Engineering and Architecture, China Three Gorges University, Yichang, Hubei, 443002, China zcxju@126.com Key words: campus space, significance of education, public open space, communication space.
The Significance of Communication Space on Education Campus not only functions as a place of studying, living and growing, but also plays an important role in spiritual level for students as a teaching material [3].

From the network point of view, as of September 30, 2010, in addition to the head office in Shenzhen, Ping An Bank has seven branches, the number of SDB’s outlets which were established through regulatory approval is 303, concentrated in three regions such as the Yangtze River Delta, Pearl River Delta and the Bohai Sea, once the acquisition is successful, Ping An Bank will save a lot of manpower and material resources, rapidly achieve a national network layout.
In the personnel area, it can absorb two key management skills, integrate a variety of research and developed department, achieve win-win goal.
Value Engineering, 2009, (09)

Introduction Sliding-trust bearing is one of the key structures of ship propulsion shafting system.
Fig.4 Effect of axial load on radiated sound power Fig.5 Effect of structural damping on radiated sound power The effect of structural damping on the noise radiation level of the bearing housing Increasing the damping ratio of the structural material is a simple and effective damping measure.
Harbin: Harbin Engineering University, 2008.

Error Analysis of Ladder Shaft Turning and the Research of NC Compensation Jian Li a, Yongchang Luo b and Xiaofan Nie c Dept of mechanical engineering, Guangxi University of Technology, Liuzhou, Guangxi, China agxlzlj@tom.com,blyc5689018@tom.com,cnxf19840419@foxmail.com Keywords: Ladder Shaft; Turning; Error Analysis; NC Compensation.
Preliminary design finishing, roughing depth of cut ap is 0.5mm and 3mm, the radial cutting force is calculated as follows: Fp——Radial cutting force; CFp——Coefficient of depends on the factor of workplace material and cutting condition ; xFp, yFp, nFp——Index of depth of cut , feed and cutting speed; KFp——Correction factor of the product; Under processing conditions, identify the factors and index value: CFp=1100,xFp=0.9,yFp=0.75,nFp=0,KFp=1 Calculation of the radial cutting forces with the change of knife back asp to change.
The spring in the shaft at both ends of the specific operation to add the following: In step two end shaft length were drawn four lines are 10mm, line for the end of a circular quadrant position endpoint key points, then add the spring element and spring element real constant, COMBIN14 by spring element 8 on the painting lines and merge model mesh nodes.

Research on Drive-part Control Strategy under the Influence of Environmental Temperature Xu-xiao Hu1,a ,Xin-rong Xu1,b ,Gang Chen1,c ,Han-tao Chen1,d 1Zhejiang Sci-Tech University,Hangzhou,310018 , China; 2 Zhejiang Sci-Tech University,Hangzhou,310018 , China; 3ZhejiangSci-TechUniversity,Hangzhou,310018 , China; 4Zhejiang Sci-Tech University,Hangzhou,310018，China; aemail: Huxuxiao@zju.edu.cn; bemail: 980058563@qq.com; cemail :465735896@qq.com Key words： Drive part；Environmental temperature ；Mathematic model；H-infinity controller Abstract： In order to reduce the influence of environmental temperature changes, the drive part mixed control strategy of PI and H-infinity based on output feedback is presented in this paper.
This text propose a modeling method in theory at the foundation of experiment, Compensation strategy research carried out for changes in ambient temperature on the basis of this model. 1．Mathematical model of nanoscale drive components Fig. 1 is a structural sketch map of drive part based on hot displacement of plasmodium, the material of the plasmodium is the steel No. 45, the size is 35 mm * 35 mm * 35mm.
Chinese Journal of Mechanical Engineering.2003: 79-83 [2] Li Yang, Li Shumin.Output Feedback H_∞ Control Based on LMI and Its Simulation[J].