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The Experimental Study on Fatigue Properties of CFRP Reinforced Concrete Beam Ziqi Li1, 2, a and Yanyan Fan 1Key Laboratory of Road & Bridge and Underground Engineering of Gansu Province 2School of Civil Engineering, Lanzhou jiaotong University, Lanzhou, China alzqfyy@163.com Keywords: Reinforced concrete beams; CFRP; Fatigue test Abstract: Based on the research of CFRP reinforced concrete beam , this article indicates that CFRP can improve greatly the fatigue performance of damage concrete beam, prolong its service life , and provide the experimental basis for long-term fatigue properties of CFRP concrete structures.
In recent year the research and engineering practice have proven that the effective ways of strengthening is: increasing section, external prestressing method, change the structure system and reinforcement, pasting steel, glass fiber reinforced plastic plate and carbon fiber reinforcement method.

Design of movable bracket for dual-axis tracking solar thermal power system Bo Song1,a, Yong Zhang1,b, Fang Bin Xu1,c 1School of Civil and Architectural Engineering, Beijing Jiaotong University, Beijing, 100044, China asongbojn@163.com bzyz3000@126.com cfangbin1205@126.com Keywords: Dual-axis tracking solar thermal power system; Movable bracket; Space tube truss; Space steel frame bracket; Structure selection Abstract: Movable bracket as an important part of dual-axis tracking solar thermal power system is large, movable and complex of its force with the orbit of connected nodes.
Therefore, choosing the reasonable structure and reducing the project cost have great significance to the popularization and application of this system. 3 The analysis of the dual-axis tracking solar power system movable support pilot project. 3.1 Engineering background The pilot project is in Zhangye City, Gansu Province, seismic fortification intensity is 7, the design basic acceleration of ground motion is 0.10g, classification of design earthquake in the second group, basic snow pressure is 0.10KN／m2, basic wind pressure is 0.50 KN／m2, ground roughness for class is A, bracket structural self vibration period T = 0.77s> 0.3s.
According to the engineering experience, the steel consumption of the nodes accounts for about 10% of the volume of the steel bracket, therefore, the steel quantity of steel braced frame structure included in the node is 182.4× (1+10%) = 200.64t. 3.5 Two structure form of bracket main design index contrast index Bracket type Space pipe truss Braced space steel frame Maximum amount of deformation Under the five-level wind（mm） 16.0 21.4 Bracket steel consumption(t) 193.2 182.4 Total steel consumption included in the node(t) 231.8 200.64 Construction difficulties relatively complicated relatively simple Connected with the track relatively complicated relatively simple 3.6 Structural requirements of the supporting wheel and track Force of the track and supporting wheel is more complex.

Daniel2,b 1 School of Engineering, Democritus University of Thrace, GR-671 00 Xanthi, Greece 2 Robert McCormick School of Engineering and Applied Sciences, Northwestern University, Evanston, Illinois 60208, USA a egdoutos@civil.duth.gr, b imdaniel@northwestern.edu Keywords: Nonlinearities, sandwich beams, foam cores, deformation, failure.
Gdoutos, undergraduate student in the Departments of Mechanical Engineering and Computer Science of Northwestern University, for his help in the calculations of the present work.

Recycled fine aggregate: all types of parental concrete were from the Civil Engineering Project in Urumqi.
Four specimen of fine aggregates are obtained after crushing and screening, which is numbered ZSX1 ~ ZSX4, respectively.ZSX1 represents recycled fine aggregate from the floor, and the strength grade is about C10 - C20; ZSX2, 3 represent recycled fine aggregate from constructional column and the beam in the brick structure, and its original strength grade is about C20 - C30; ZSX4 fine aggregate is from underground engineering concrete structure, and its original strength grade is C30 – C40.
Environmental engineering, 2008(26):263-266

Comparison between Rice Husk Ash and Commercial Silica as Filler in Polymeric Composites Iara Janaína Fernandes1,a, Daiane Calheiro2,b, Emanuele Caroline Araújo dos Santos2,c, Roxane Oliveira2,d, Tatiana Louise Avila de Campos Rocha3,e and Carlos Alberto Mendes Moraes1,f 1 Civil Engineering Graduate Program, Universidade do Vale do Rio dos Sinos (UNISINOS) Av.
Unisinos, 950, 93022-000 São Leopoldo, RS, Brazil. 2 Environmental Engineering Undergraduate Program, UNISINOS. 3 Electrical Engineering Graduate Program, UNISINOS.

Cherednichenkoc* Volgograd State Technical University, Institute of Architecture and Civil Engineering Volgograd, Russia aoburlachenko@yandex.ru, b*oxxxana72@yandex.ru, ctati_cher@mail.ru Keywords: energy saving, thermal protection of buildings, thermal properties of materials, calculation of temperature fields.
Cherednichenko, Effective way to improve thermophysical properties of exterior walls of brick buildings during reconstruction, IOP Conference Series: Materials Science and Engineering,451 (2018) 012050
Tukharely, The possibility of using the ultrafine liquid thermal insulation to protect the load-bearing reinforced concrete elements in multi-layered outer wall [Electronic resource], Engineering journal of Don, 2 (2017) 9

Coupled Vibration Analysis of Vehicle-Bridge System for Yujiang River Bridge on Nanning-Guangzhou Railway Line Deshan Shana, Shengai Cuib Bridge Engineering Department, Southwest Jiaotong University, 111, 1st Northern Section of the Second Round Road, Chengdu, Sichuan Province, China adsshan@163.com, b shengai_cui@126.com Keywords: cable-stayed bridge, coupled vibration, co-simulation, multi-body system dynamics, finite element method Abstract: Taking Yujiang River Bridge on Nanning-Guangzhou railway line as study background, the refined numerical simulation model of whole vehicle and whole bridge system for coupled vibration analysis is set up.
Acknowledgment The research reported herein has been conducted as part of the result of a series of research projects granted by the National Science Foundation with 51078316, Fundamental Research Funds for the Central Universities with SWJTU09ZT02 & SWJTU09CX02, and the Open Fund of Sichuan Provincial Earthquake Engineering and Technology Key Laboratory (Southwest Jiaotong University), with skz200906.
China Civil Engineering Journal,1999,32(3): 23-26

Numerical Modeling and Solution of Ground Water Inrush at the Baixiangshan Iron Mine Wu Di1, a, Cai Sijing2, b and Wang Wenxiao3, c 1.2 School of Civil and Environmental Engineering University of Science and Technology Beijing, China 3 Gushan Mining Company Ma Steel Group Ma’anshan, China a tauo123@163.com, b sjcai@admin.ustb.edu.cn, c wwx61@mail.mas.ah163.net Keywords: Baixiangshan iron mine; ground water inrush; mathematical model; numerical solution Abstract.
References [1] China Central Engineering and Research Institute of Non-Ferrous Metallurgical, Primary design of the Baixiangshan iron mine and modified illustration, Beijing: 2005 (In Chinese)
[8] Yang Tianhong, “State of the art of inrush models in rock mass failure and developing trend for prediction and forcast of groundwater inrush,” Chinese Journal of Rock Mechanics and Engineering, 2nd ed., vol. 26, 2007, pp. 268-277.

Safety analysis of tunnel in gob of high steep thick coal seam (II) — 3-D numerical simulation for mechanics of initial and secondary support structure Wenbin Lu1,2,a, Yimin Wu1,b, Jie Chen3,c, Helin Fu1,d 1School of Civil and Architectural Engineering, Central South University, Changsha 410075,China; 2Hunan Urban Construction College, Changsha 411101,China; 3Tongling Transport Bureau, Tongling 244000, China a luwenbin_csu@163.com,b wuyimin531@163.com,c cjgck0425@163.com,d fuhelin100@sohu.com Keywords: Tunnel in gob of coal seam, high steep coal seam, initial and secondary support, impact of mining, numerical simulation.
References [1] Demin Ding, Fengshan Ma, Yamin Zhang, Changxiang Yang and Gaohua Jia: Journal of Mining & Safety Engineering,Vol. 27(02) (2010), p.249-254 [2] Mingli Wang: Coal Mining Technology, Vol.14(03)(2009), p.87-89 [3] Huayang Dai, Jingzhuang Wang, Yonghai Teng, Zhixin Tang: Journal of China Coal Society.
Rock and Soil Mechanics,Vol.26(6)(2005), p.910-914+905 [6] Shuren Wang, Haiqing Zhang, Naiqi Shen, Haiying Cao: Chinese Journal of Rock Mechanics and Engineering, Vol, 28(6) (2009), p, 1144-1151.

Simplified Method for Elastic Distortional Buckling Stress of Cold-Formed Thin-Wall Steel Members Zhao Yang1,a, Yan WeiMing1,b, Yu Cheng2,c 1School of Architecture and Civil Engineering, Beijing University of Technology,100124, Beijing, China 2 University of North Texas, USA anewworld.com@163.com, byanwm@bjut.edu.cn, ccheng.yu@unt.edu Keywords: cold-formed thin-wall steel; elastic distortional buckling stress; flexural members; compression members Abstract: For the distortional buckling of cold-formed thin-wall steel members, the Direct Strength Method (DSM) is a recently adopted design approach by foreign standard, and Chinese professional standard Technical specification for low-rise cold-formed thin-wall steel buildings present the calculation formulas based on the Effective Area Method (EAM) .The key of both methods is the elastic distortional buckling stress .At present, the calculation methods about it are over conservative .Compare the calculation results of method in AISI
China standard calculation bowed the pressure distortion of the crankshaft EAM, convenient for engineering application, also can and other Chinese standard calculation formula keep in touch.
Structural Engineers,2010,26(5):148-156 (in Chinese)