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The Application of Ecological Energy-saving Technologies in Urban Planning- Taking Gongqing DigiEcoCity as an Example Li Xiaoqiong1, a, Bai Haitao2, b, Tao Chunyuan3, c, Wang Yingxiang4, d 1 Poyang Lake Eco-economy Research Center & Civil Engineering and Construction Institute of Jiujiang University, Jiujiang, Jiangxi Province, China, 332005 2 Poyang Lake Eco-economy Research Center & Civil Engineering and Construction College of Jiujiang University, Jiujiang, Jiangxi Province, China, 332005 3 Poyang Lake Eco-economy Research Center of Jiujiang University, Jiujiang, Jiangxi Province, China, 332005 4Gongqing Management and Investment Ltd, jiujiang, Jiangxi Province, China, 332000 atm_lixiaoqiong@jju.edu.cn; blcbht666@126.com; cchunyuan_tao@163.com; dwyingxiang@126.com Key words: Energy-saving Technologies; Ecological City; Digital City Abstract.

Evaluation of the Mechanical Strength of a Concrete Modified with PET Fibers from Post-Consumer Bottles Victor Hugo Blancas-Herrera1,a, Wilfrido Martinez-Molina1,b, Hugo Luis Chavez-Garcia1,c*, Jorge Alberto Pacheco-Segovia1,d, Sandra del Carmen Argüello-Hernandez1,e, Noel Diaz-Gonzalez1,f, Hypatia Mariana Cruz-Reyes1,g, Elia Mercedes Alonso-Guzman1,h and Rosalia Ruiz Ruiz1,i 1Materials Department, Faculty of Civil Engineering, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México, 58040.
Acknowledgment The authors wish to thank the financial support of Universidad Michoacana de San Nicolas de Hidalgo, Civil Engineering Faculty and Conacyt.

Part I: Cohesive Crack Modelling Václav Veselý1,a, Ladislav Řoutil1,b and Stanislav Seitl2,c 1 Institute of Structural Mechanics, Faculty of Civil Engineering, Brno University of Technology, Brno, Czech Republic 2 Institute of Physics of Materials, Academy of Sciences of the Czech Republic, v.v.i., Brno, Czech Republic a vesely.v1@fce.vutbr.cz, broutil.l@fce.vutbr.cz, cseitl@ipm.cz Keywords: wedge-splitting test, cementitious composites, quasi-brittle fracture, brittleness, characteristic length, notch length.
Due to its advantages (described in detail e.g. in [1-3, 5]), it is frequently used in material research (e.g. [4]) or for the determination of the parameters of material models (e.g. [5]) developed for predictions of the quasi-brittle failure of heterogeneous materials used in civil engineering (concrete, mortar, fibrous composites, rock etc).

Experimental and Numerical Simulation Study on Compressive Performance of Autoclaved Fly Ash Perforated Brick Masonry Long Columns Chunyi Xu1,2,a, Ming Liu2,b and Bo Xu3,c 1Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116023, China 2School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China 3School of Architecture and Civil Engireering, Shenyang University of Technology,Shenyang 110023, China axuchunyiyi@163.com, bliumingsy2008@163.com, cxubo-archi01-3@163.com Key words: Masonry; Autoclaved Fly Ash Perforated Brick; Compressive Bearing Capacity; Slenderness; Numerical Simulation Abstract.

Mechanism of High-strength Concrete Damage Evolution Based on CT Observation Hui Zhang1,a, Renshu Yang1,b , Ling Zhao1,c, Hui Cao2,d 1School of Mechanics, Architecture and Civil Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China 2Beijing Vocational &Technical Institute of Industry, Beijing, 100042, China azkhuier@sohu.com, byrs@cumtb.edu.cn, czhaoling0357@163.com, d64498187@qq.com Keywords: High-strength Concrete; Fractal dimension; Negative temperature frozen; Damage factor Abstract.
To study damage evolution of high-strength concrete under the frozen environment, based on the background of YunCheng auxiliary shaft engineering, this paper studies the damage pattern of C100 concrete under loading by applying the method of industry CT scanning.
Test description The C100 high-strength concrete used in YunCheng auxiliary shaft engineering would be as the study object, Which is tested in State Key Laboratory of Coal Resources and Safe Mining of China University of Mining and Technology, Beijing Key Laboratory of Rock and Concrete Fracture Mechanics, what uses on test is uniaxial load of EHF-EG200KN hydraulic rigidity loading system, and shimadzu industrial spiral CT scanner to estimate fracture face scanning picture.
China Civil Engineering Journal, Vol.2-42(2009),p.31-38 (In Chinese)

Study on deformation prediction of the tunnel surrounding rocks based on non-equal time-interval grey model Pengfei Geng1,a , Changmin Yang2,b,Weidong Guo2,c, Peng Wang3,d 1,2College of Civil Engineering and Architecture, Hebei University, Baoding 071000, Hebei, China; 3Hebei construction group co., LTD aliuyefeifei001@163.com,bchangmyang@163.com,chbugwd_2008@126.com,d8121693@qq.com Key words: grey system; GM (1, 1);deformation; non-equal time-interval Abstract: The thesis develops an non-equal time-interval GM (1, 1) model to forecast the deformation of the tunnel surrounding rock.
The numerical results indicate that the non-equal time-interval GM (1, 1) model does well in predicting the deformation of tunnel surrounding rock and is worthy to put into use in tunnel engineering.
Introduction As is well known, it is difficult to measure or forecast the deformation in tunnel engineering due to unknown of rock formation condition, rock attitude, different geologic progress.
Engineering practice The model developed above was used to predict the convergence of the surrounding rock in Linli tunnel, Zhangzhuo expressway engineering.
The engineering example confirmed that the non-equal time-interval GM (1,1) model shows a good performance in short time distance.

Research on Dynamic Impedance Function for Horizontal Vibration of Single Pile Fangding He1,a Guangjun Guo 2,b Yang Yang3,c 1 Hydraulic Research Institute of Shandong Province，Jinan，250014，China 2Department of Water Resources of Shandong Province，Jinan，250014，China 3 School of Civil Engineering, Shandong University, Jinan，250061, China a6974554@126.com b6974470@126.com cyy-24@163.com keywords: single pile, horizontal vibration, impedance function, transition matrix Abstract: The horizontal vibration characteristic of the pile foundation is a key technology in dynamic design of foundation engineering.
Introduction In the modern architectural engineering, pile foundation with its high bearing capacity and low settlement is increasingly widely applied, especially in soft soil area.
Therefore, actual engineering massively meet the problem how to achieve economic and reasonable design of the pile foundation.
How to properly reflect horizontal vibration characteristics of the single pile in engineering design is notable [1-3].
Dynamic analysis of the single pile under the function of horizontal load: submitted to The earthquake engineering and engineering vibration journal,1986.6,9(2)

Artificial rainfall failure experiments for a red clay slope Kai sheng Chen Kai Sheng Chen, male, born in 1975, is mainly engaged in teaching and research of road engineering and geotechnical engineering.
Civil Engineering School,Guizhou University Guiyang Guizhou China Key words: red clay slope; artificial rainfall; failure test Abstract:The influence of rainfall on slope stability problem that highway, railway,water conservancy and energy engineering production must consider and study, the rainfall is one of the major factors causing the soil slope failure.
Journal of Waterway Engineering, 2012 (6):21-27 [2] Xu Xiangzhou, Liu Daqing, Zhang Hongwu, etc.
Gansu Water Conservancy and Hydropower Engineering, 2013, 49 (5):21-23 [5] Wang Peiqing, Fu Qiang.
Highway Engineering 2013,38 (4):1-4 [7] Zheng Ying.Parameter Selection Research on Rainfall Infiltration’s Influence on the Stability of Red Clay Slope [J].

Vibro-replacement Stone Column Treating Silty Sand soil Subgrade Yuqing Yuan1, a, Wei Li1, b, Xuechan Li2, c, Tao Guo1, d 1School of Civil Engineering and Architecture, Henan University, Kaifeng 475004, Henan, China 2College of Philosophy and Public Administration , Henan University, Kaifeng 475004, Henan, China ayuanyq@126.com, b250315995@qq.com,cyroad@126.com, dzhulin356@yahoo.com.cn Keywords: road engineering; vibro-replacement stone column; silty sand soil; soft foundation; finite elements Abstract.To improve the wet soft silty sand bearing capacity, vibro-replacement stone column was used.
For the so many advantages, the pile can be widely used in the engineering.
The aim is to obtain some experiences to support road engineering construction.
Combined with the practical engineering, the construction technology is shown in Fig.3.
Zhang, Z.L.Sui:Journal of Engineering Geology, Vol.12(2004),p.148-153

Hsu 3,c 1 Department of Safety Health and Environmental Engineering, Central Taiwan University of Science and Technology, Taichung, 40601, Taiwan 2 Department of Civil Engineering, National Chung-Hsing University, Taichung, Taiwan 3 Department of Construction Engineering, Chaoyang University of Technology, Taichung, Taiwan a107059@gtrial.ctust.edu.tw, bdmlue@dragon.nchu.edu.te, cwthsu@cvut.edu.tw Keywords: Equal leg angle with lip steel section, Cold-formed steel, Warping constant, Cw, AISI.
Evaluation of these torsion induced stresses is not a routine job for practicing engineers as one of major difficulties arises from the determination of sectional warping constant (Cw).
As a matter of fact, a simple and very reliable approach for evaluating Cw values would be very useful for practicing engineers in dealing with torsional problems.
The illustrative example should help practicing engineers in calculating Cw for sections that are not available in the 2002 AISI design manuals. 2.
The proposed computational procedure and formulas can be very useful for engineers in dealing with the Cw calculation of equal leg angle with lips that cannot be found in the design manuals.