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Three-dimensional Numerical Analysis on Heading Construction of Metro Station by Drift-PBA Method Yang Yuan1, a, Weining Liu1, Deyun Ding1, 2, Xincai Gao3, Meng Ma1 and Hao Jin1 1School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China 2Beijing Urban Engineering Design and Research Institute Co.
Ltd., Beijing 100037, China 3Beijing General Municipal Engineering Design and Research Institute, Beijing 100082, China aemail:yuanyuanok_2004@163.com Key words: Drift-PBA method; Numerical simulation; Heading construction; surface settlement; Pipeline deformation Abstract.
Combining with existing experiences in engineering, arch construction technology [8-9] was relatively mature; yet, the study on heading excavation was still lack.
[2] Shucai Wang, Zhiping Huang and Yubo An: Railway Engineering, (2006), p. 44-46
[7] Meiqin Zhang: Journal of Heilongjiang Hydraulic Engineering College, Vol. 33(2006), p. 43-46

Testing and Analysis on Dynamic Rheologic Characteristics of Soft Soil under Different Breadth conditions of Dynamic Loading HU Hua ( Xiamen University Tan Kah Kee College, Fujian Zhangzhou City, 361005) xmhuhua@xujc.com Keywords: dynamic loading; dynamic loading breadth; marine deposit soft soil; Dynamic rheologic characteristics Abstract: The practical investigating and theoretic analysis Indicates that the rheologic action of the soft rock-soil could be accelerated by the dynamic loading, which induces more geotechnical engineering accidents and geologic disasters.
In the western development and construction, most of the infrastructure constructions stand upon the sandy soil, loess, and loose rock and soil layers; in the economic development of coastal areas in the southeast, many civil engineering are constructed on soft rock-soil foundation; National major projects such as: the Three Gorges project, the West-East Gas Transmission, the South-to-North Water Transfer Project, power transmission from west to East, are related to geologic disasters of soft rock-soil and disaster reduction for geotechnical engineering problems.
The practical investigation and theoretical analysis show [1-4] soft rock-soil has rheologic characteristics, which means it’s theologically slow and steady when static load is applied, but easily be accelerated and turns into geotechnical instability, geological disasters, foundation slide instability, engineering inclined crack etc. such as landslide, collapse under the external dynamic loads such as earthquake, mechanical vibration, vehicular traffic, engineering blasting.
Reference [1] JIANG Yuzhou, XU Weiya, WANG Ruihong: Rock and Soil Mechanics(in chinese).2011,32(S1), P.339-345 [2] HUANG Yaoying, ZHENG Hong: Rock and Soil Mechanics(in chinese).2011,32(12), p.3566-3570 [3] LIN Bin, ZHAO Fasuo, HUO Liang: Journal of Engineering Geology.2010,18(5),p. 685-691 [4] Wu Debin, Xu Weiya, Zhu Zhendei,Liu Shijun:Chinese Journal of Rock Mechanics and Engineering(in chinese).2004,23(8),p.1242-1246 [5] HU Hua: Rock and Soil Mechanics(in chinese).2007,28(2), p.237-240 [6] HU Hua, GU Hengxing, YU Dengrong: Rock and Soil Mechanics(in chinese).2008,29(3), p.696-700 [7] HU Hua, YU Dengrong,GU Hengxing: Journal of Natural Disasters(in chinese).2007,16(4), p.61-65

Static and Dynamic Behavior of the High-pier and Long-span Continuous Rigid Frame Bridge Liu Jianxin 1, a, Wang Ying 1, b, Zhu Meichun 1, Zhang Zhihong 1, Zhang Xinhua1, Guo Jianhong 1, Li Pei 1 andTang Wen 1 1College of Civil Engineering, Shanghai Normal University, Shanghai, China aljx163@163.com, bwycyt2000@163.com (corresponding author) Keywords: static and dynamic behavior, seismic response, high-pier, long-span, continuous rigid frame bridge, finite element.
The calculation methods and results in this paper can provide some referenced information for the engineering design.
The calculation methods and results can be taken as a reference for engineers and technicians.
[4] Yuxian Hu, Earthquake Engineering, China, 2006
Railway Engineering. 2 (2010) 14-17.

Study on the Influence of Shear Connectors on the shear-bond behavior of Profiled Steel Sheeting-concrete Composite Slabs Wei Xu1, a, Ruiya Xiao1, Xiaobo Chang1, Jizhong Wang1, Guochang Li1 1School of Civil Engineering, Shenyang Jianzhu University, Shenyang, Liaoning 110168, China axuweiy1996@sina.com Keywords:Profiled Steel Sheeting-concrete Composite Slab,Shear Connectors,Shear-bond Behavior.
The simulation of Profiled Steel Sheeting-concrete Composite Slabs is based on ABAQUS,the finite element simulation software.The simulation is compared with the test to verify correctness of the finite element simulation method.By changing shear connectors of composite slabs, studies are performed on the influence of shear-bond property ,the behavior of slip between sheeting and concrete,slip distribution along the composite slabs and so on.The results indicate that setting shear connectors ,such as shear reinforcement and studs, can improve ultimate bearing capacity and reduce the slippage between the interface.The studs’ effect is more obvious.Actual engineering should select suitable shear connectors,so that it can meet the strength requirement and be economical.
(4)Compared with the shear reinforcement, the stud’s effect is better, and we also can consider a combination of them.In the practical engineering,we should consider all kins of factors,choose suitable shear connectors.

Seismic Strengthening on Masonry Structure of Primary and Secondary School Buildings Xuefeng Zhou1, a and Xiang Chen1, b 1School of Civil Engineering, Xi’an Technological University, Xi’an, China azxf0311@126.com, bxichen0801@163.com Keywords: Seismic strengthening, Masonry structure, Underlying safety concerns, Safety of school buildings.
It is an important issue for engineers and technicians that how to conduct safe identification and earthquake resistant strengthening of the primary and secondary school buildings after Wenchuan earthquake.
[3] Enping Zhao, Nayin Yang and Ziwei Chang: Earthquake Resistant Engineering and Retrofitting, Vol. 31(2009), p. 124-129, in Chinese

Analysis about the classification of Landslide Monitoring Method Xu Xin1,a,Shang Min1,2,b,Deng Yonghuang3,C 1College of Civil Engineering &Architecture, China Three Gorges University,Yichang 443002,China 2China Three Gorges University Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education, Yichang 443002, China 3College of Science and Technology of Three Gorges University, Yichang, Hubei 443002, China aE-mail:837662408@qq.com, bsumming@126.com, c727775298@qq.com Keywords: landslide, landslide monitoring, monitoring method classification, monitoring means, monitoring objects Abstract.
In the south-west of China and Three Gorges Reservoir Region, landslide has caused great lost to the people's production and living.Thus,building the efficient landslide monitoring system is not only beneficial to avoid the occurrences of landslide by engineering method, but also could reduce the lost caused by landslide.
The information it gets is intuitive and reliable but singleness and low precision.. 3.1.2Simple Monitoring Method The Simple Monitoring Method monitors the phenomenon of ground surface crack, building deformation and groundwater variation by manual monitoring.Besides,it uses some simple instruments, which benefit for the group measurement and group prevention,such as simple test pile,scaleplate,simple glass strip and cement mortar belt.This method is easy to observe and operate but has large and complex workload which makes it difficult to realize the unmanned monitoring. 3.1.3Setting-station Monitoring Method The Setting-station Monitoring Method monitors the deformation and displacement of the landslide with Geodesic Method, Close Shoot Method and GPS Method on the basis of the understanding of the site engineering geological background by setting observing point, line, station and network on the slope.
In order to observe the stability of landslide, the landslide thrust monitoring method sets pressure sensors in different depth of landslide to monitor the cross thrust force of the landslide and its transformation.The method is qualified for various kinds of landslide monitoring and could afford thrust data for the prevention and treatment engineering designing. 3.2.3 Hydrographic Monitoring The main monitoring objects of hydrographic monitoring are underground water level,pore water pressure,spring discharge and river level.The common instruments includes water level gauge,osmometer,pore water pressure gauge and TDR soil moisture meter.The hydrographic monitoring applies to the landslide monitoring at different deformation stage.The achievement could be used as initial data. 3.2.4 Environmental Monitoring The trigger factors of landslide mainly include earthquake,rainfall,freeze-thaw and human activities.Thus,it is quite important to monitor the rainfall,ground temperature and earthquake.The
China Three Gorges Reservoir collapse landslide monitoring and early warning and engineering practice.

Developing a Single-Specimen Technique for Low-Temperature R-Curve Determination of Asphalt Concrete Using a Modified Unloading Compliance Method Sepehr Ghafari1,a*, Fereidoon Moghadas Nejad2,b, Hadi Kazemi1,c 1School of Built Environment, Engineering and Computing, Leeds Beckett University, United Kingdom. 2Department of civil and environmental engineering, Amirkabir University of Technology, Tehran, Iran.
Fracture resistance curves (R-curves) have served as a robust tool in characterizing the entire fracture process of engineering materials.
Nevertheless, despite fracture energy can be treated as an overall measure of the fracture performance of AC mixtures against low-temperature cracking, the role of multiple energy types remains unknown when using this parameter for engineering design of pavements.
Fracture resistance curves have served as a robust tool in characterizing the entire fracture regime of engineering materials [8].

Progressive Failure Research on Foundation Surface of Concrete Gravity Dam Chao Jia1, a, Feng Gao1, b , Yong Li2, c 1School of Civil Engineering, Shandong University, Ji’nan, Shandong, 250061, P.R.China 2Geotechnical and Structural Engineering Research Center, Shandong University, Ji’nan, Shandong, 250061, P.
Sliding failure along foundation surface is a potential failure mode of concrete gravity dam, and this mode is relatively rare in practical engineering.
In Chinese [9] Jiazheng Pan: Engineering Geological Calculation and Foundation Treatment.

Research on Dynamic Performance of Concrete-filled Steel Tubular Trussed Arch Bridge under Earthquake Xianli Yan1, a, Qingning Li1, b, Chang Gao2, c and Liying Wang3, d 1School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, P.R.China 2Xinjiang Highway Planning Survey Design & Research Institute, Urumqi, Xinjiang, 830006, P.R.China 3China New Era International Engineering Corporation, Xi’an, 710054, P.R.China alookat3326@163.com, blqn952@163.com, cyan.xianli@live.cn, dwangliying2918@hotmail.com Keywords: CFST trussed arch bridge, Finite element model, Dynamic characteristic, Time history analysis, Seismic response.
Taking a double span- swallows-type CFST (concrete-filled steel tubular) trussed arch bridge as an engineering example; a spatial finite element analysis model is established to calculate its dynamic characteristic.
Taking a double span- swallows-type CFST trussed arch bridge as an engineering example; this paper did a research on dynamic performance of the CFST trussed arch bridge.

Columns with Recycled Aggregate Tong Hao1,a,*, Lintao Zhao1,b and Zhaohua Du1,2,c 1 School of Civil Engineering, Zhengzhou University, Zhengzhou, 450002, Henan, China 2 Zhengzhou University Multi-functional Design and Research Academy, Zhengzhou, 450002, Henan, China ahaotong@zzu.edu.cn, bzltnew@163.com, chndzh1972@163.com Keywords: recycled concrete, column, axial compression, eccentric compression Abstract.
This may be as a reference for the application of the concrete with recycled aggregates in engineering.
The test mix design which commerical ready-mixed concrete factory used in the real engineering.
Structural Engineers. 22 (2006) 73-77 [2] J.Zhang, Y.Z.Ye, C.Gao.