摘要：
The mechanical performance of recycled aggregate concrete (RAC) is investigated. An experiment on the complete stress-strain curve under uniaxial compression loading of RAC is carried out. The experimental results indicate that the peak stress, peak strain, secant modulus of the peak point and original point increase with the strength grade of RAC enhanced. On the contrary, the residual stress of RAC decreases with the strength grade enhancing, and the failure of RAC is often broken at the interface between the recycled aggregate and the mortar matrix. Finally, the constitutive model of stress-strain model of RAC has been constituted, and the results from the constitutive model of stress-strain meet the experiment results very well.
作者机构：
[Xie Hui; Xue Xingjian; Ou Xinquan] Tongji Univ, Sch Transportat Engn, Shanghai, Peoples R China.;[Xue Xingjian] Hunan City Univ, Sch Civil Engn, Yiyang, Hunan, Peoples R China.
会议名称：
2010 3rd IEEE International Conference on Computer Science and Information Technology(第三届IEEE计算机科学与信息技术国际会议 ICCSIT 2010)
会议时间：
2010-07-07
会议地点：
成都
会议主办单位：
[Ou Xinquan;Xue Xingjian;Xie Hui] Tongji Univ, Sch Transportat Engn, Shanghai, Peoples R China.^[Xue Xingjian] Hunan City Univ, Sch Civil Engn, Yiyang, Hunan, Peoples R China.
会议论文集名称：
2010 3rd IEEE International Conference on Computer Science and Information Technology(第三届IEEE计算机科学与信息技术国际会议 ICCSIT 2010)论文集
关键词：
traffic organization;space syntax;shared parking;parking guidance and information system;central business district
摘要：
The idea of smart growth has been accepted by many farseeing cities around the world. Their goals are to concentrate growth in the center of a city to avoid urban sprawl. Against this background, shared parking which needs less space but provides more parking spaces is welcome in urban area. However, it has been still a challenge for traffic engineers and metropolitan governors to make parking garages and lots in large-scale area, especially in the central business distribution, shared as an integrated one. This paper tries to adopt traffic organization to solve the problem of shared parking. First, it introduces space syntax which is a paradigm of city and modifies its behavioral hypotheses for motor vehicles. Then, it improves the traffic system by making use of space syntax in traffic organization combining with parking guidance and information system (PGIS). Finally, it presents the application of this method in Yanghuyuan micro center business district (MCBD), which is located in Changsha, China.
作者机构：
Tunnel and Underground Engineering Research Center of Ministry of Education, Beijing Jiaotong Univer;School of Civil Engineering, Hunan City University, Hunan,Yiyang, 413000, China
会议名称：
2010 International Conference on Intelligent Computation Technology and Automation(2010 智能计算技术与自动化国际会议 ICICTA 2010)
会议时间：
2010-05-11
会议地点：
长沙
会议论文集名称：
2010 International Conference on Intelligent Computation Technology and Automation(2010 智能计算技术与自动化国际会议 ICICTA 2010)论文集
摘要：
Constructing metro tunnel in shallow stratum destroys surrounding stratum structure, causing corresponding deformation and settlement of stratum. So it's very important to accurately predict stratum deformation and settlement for metro tunneling. In this paper, the features of FLAC3a and built-in material constitutive model are firstly analyzed, then compared with other calculating procedures, besides it is used to predict stratum deformation and settlement caused by the Shenzhen metro tunneling. It can be seen from the numerical results of the calculation obtained from FLAC3D that stratum deformation and settlement agree well with that of in-situ measurement, and can reflect the typical characteristics and change laws of stratum deformation and settlement caused by metro tunneling, which indicates that using FLAC3D to analyze stratum deformation and settlement caused by metro tunneling is feasible.
作者机构：
[熊创贤; 邓运来; 万里] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[邓运来; 万里] Key Laboratory of Nonferrous Metal Materials Science and Engineering, Central South University, Changsha 410083, China;[熊创贤] Department of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
School of Materials Science and Engineering, Central South University, China
作者机构：
[熊创贤; 邓运来; 张新明; 张劲] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[邓运来; 张新明] Key Laboratory of Nonferrous Materials Science and Engineering, Ministry of Education, Changsha 410012, China;[熊创贤] Department of Civil Engineering, Hunan City Institute, Yiyang 413000, China
通讯机构：
[Xiong, C.-X.] S;School of Materials Science and Engineering, Central South University, China
作者机构：
[刘晓艳; 刘俊生; 李文斌; 何运斌; 梁文杰; 潘清林] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[李文斌] School of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
School of Materials Science and Engineering, Central South University, China
作者机构：
[Zhang Chengping] Beijing Jiaotong Univ, Minist Educ, Tunnel & Underground Engn Res Ctr, Beijing 100044, Peoples R China.;[Li Limin] Hunan City Univ, Sch Civil Engn, Yiyang 413000, Hunan, Peoples R China.
会议名称：
International Conference on Civil Engineering
会议时间：
JUL 19-20, 2010
会议地点：
Baoding, PEOPLES R CHINA
会议主办单位：
[Zhang Chengping] Beijing Jiaotong Univ, Minist Educ, Tunnel & Underground Engn Res Ctr, Beijing 100044, Peoples R China.^[Li Limin] Hunan City Univ, Sch Civil Engn, Yiyang 413000, Hunan, Peoples R China.
关键词：
Tunnel construction;fault fracture zone;safety risk;geology forecast;grouting reinforced region
摘要：
On the basis of Bieyancao Tunnel project, which is one of the eight level I risk tunnels in Yichang - Wanzhou railway line, the safety risks for tunneling in fault fracture zone are analyzed. The safety risks include mutations of engineering geology and hydrogeology, surrounding rock instability, sudden water inflow, structural damage of tunnel lining, exhaustion of groud water in tunnel top. Based on that, an idea is presented that the key to safety risk control of Bieyancao Tunnel is precise geological forecast system and reliable grouting reinforced structure system. By means of advance detection, a detail forecast is made for the geological conditions of F1 fault fracture zone and its influence zone. The reasonable thickness of grouting reinforced region is determined in engineering analogy method, and water plugging reliability of grouting reinforced region is checked by theoretical calculation. The tunnel construction shows that, practical geological conditions are very close to forecast results, the water plugging results of grouting reinforced structure system is very close to theoretical calculation, and the stable grouting reinforced structure system guarantees a safe tunnel project. The safety risk control system used in Bieyancao Tunnel has a very good effect, and it can be used for reference in similar projects.
作者机构：
[杨果林; 李昀; 蒋建清; 许桂林; 王亮亮] School of Civil Engineering and Architecture, Central South University, Changsha 410075, China;[蒋建清] School of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
School of Civil Engineering and Architecture, Central South University, China
作者机构：
[刘晓艳; 刘俊生; 李文斌; 何运斌; 梁文杰; 潘清林] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[李文斌] Department of Civil Engineering, Hunan City University, Yiyang 413000, Hunan, China
通讯机构：
[Pan, Q.-L.] S;School of Materials Science and Engineering, Central South University, China
作者机构：
[杨慧; 陈瑜; 曹平; 马春德] School of Resources and Safety Engineering, Central South University, Changsha 410083, China;[江学良] School of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
School of Resources and Safety Engineering, Central South University, China
