作者机构：
[陈敏; 陈伯望; 贺国京] College of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Changsha;410004, China;[刘畅] CCDI Group, Shenzhen;518048, China;[陈敏; 陈伯望; 贺国京] 410004, China
通讯机构：
College of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Changsha, China
作者机构：
College of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Changsha;410004, China;CCDI Group, Shenzhen;518048, China;[陈敏; 贺国京] College of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Changsha
通讯机构：
College of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Changsha, China
摘要：
Pre-stressed concrete continuous rigid frame bridges have been widely used for modern long-span bridges due to its advantages, such as comfortable for travelling, easy to be constructed and maintained etc. However, cracks and excessive mid-span sag of box girders generally exist in many built bridges of this kind during service, and because of its large size and the complex natural environment, it is particularly important to study the long-term performance based on the long-term field measurements. In this paper, a high-pier & long-span pre-stressed concrete continuous rigid-frame bridges, with five-spans (106m+3×200m+106m), was taken as the research object, by pre-embedding strain sensors in mid-span sections and root sections on box girders, field-tests for stress variation were conducted in extreme weather conditions (ie, the hottest and coldest in one year) after its completion in two years, providing tested data for studying long-term performance of bridges similar to the same kind.
作者机构：
[Chen, Min; He, Guojing] Cent South Univ Forestry & Technol, Sch Civil Engn & Mech, Changsha 410004, Hunan, Peoples R China.;[Liu, Chang] China Construct Shenzhen Design Int, Shenzhen 518000, Peoples R China.
通讯机构：
[Chen, Min] C;Cent South Univ Forestry & Technol, Sch Civil Engn & Mech, Changsha 410004, Hunan, Peoples R China.
会议名称：
1st International Conference on Advances in Civil Infrastructure Engineering (ICACIE 2012)
会议时间：
SEP 15-16, 2012
会议地点：
Changsha, PEOPLES R CHINA
会议主办单位：
[Chen, Min;He, Guojing] Cent South Univ Forestry & Technol, Sch Civil Engn & Mech, Changsha 410004, Hunan, Peoples R China.^[Liu, Chang] China Construct Shenzhen Design Int, Shenzhen 518000, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Energy dissipation;Optimal distribution;Storey drift;Time-history analysis;Viscous damper
摘要：
A certain amount of viscous dampers are installed in the 10-storey frame structure in line with different distribution strategies, and then 2 sets of strong earthquake records and 1 set of artificial acceleration time-history curve are selected to conduct the time-history analysis under both frequently and rarely earthquakes via ETABS software. Based on the comparison of the time-history analysis results in various working cases, the ideal energy dissipation results can be obtained when the dampers are installed in the lower stories with a larger storey drift, which also help to utilize the upper space of the structure. The time-history analysis shows that the viscous dampers installed in the lower part of a building have a better effectiveness of vibration isolation than those in the upper parts, and it is no necessary to install too many dampers, for the energy dissipation effects tend to be steady when the number of dampers has been increased to a level.
关键词：
Passive energy dissipation;Performance-based design;Sustainable development
摘要：
This paper generalizes the research status of passive energy dissipation technology in the field of Structural Engineering. Many achievements has been gotten since its emergence, including the manufacture of dampers, the experimental research and control effect analysis for energy dissipation systems, as well as the studies on its optimal design theory, which plays an important role in protecting people's life safety. However, the current design idea mainly focuses on the security, thus the energy dissipation structures will still suffer great economic losses even in moderate earthquakes. As a result, it is quite necessary to introduce the performance-based seismic design idea to study the design theory for passive energy dissipation. This paper has detailed three key problems in performance-based design of passive energy dissipation and put forward some strategy. Finally, it marks out that to study the performance-based design theory in passive energy dissipation system is of great significance in promoting the sustainable development of society.
期刊：
Applied Mechanics and Materials,2012年204-208:1150-1153 ISSN：1660-9336
通讯作者：
Chen, Min
作者机构：
[Chen, Min; He, Guojing] Cent South Univ Forestry & Technol, Sch Civil Engn & Mech, Changsha 410004, Hunan, Peoples R China.;[Liu, Chang] China Construct Design Int, Shenzhen 518000, Peoples R China.
通讯机构：
[Chen, Min] C;Cent South Univ Forestry & Technol, Sch Civil Engn & Mech, Changsha 410004, Hunan, Peoples R China.
会议名称：
International Conference on Civil, Architectural and Hydraulic Engineering (ICCAHE 2012)
会议时间：
AUG 10-12, 2012
会议地点：
Zhangjiajie, PEOPLES R CHINA
会议主办单位：
[Chen, Min;He, Guojing] Cent South Univ Forestry & Technol, Sch Civil Engn & Mech, Changsha 410004, Hunan, Peoples R China.^[Liu, Chang] China Construct Design Int, Shenzhen 518000, Peoples R China.
会议论文集名称：
Applied Mechanics and Materials
关键词：
Energy dissipation;Supplemental damping ratio;Time-history analysis;Viscous damper
摘要：
Energy dissipation structure is favored by designers because the earthquake energy can be dissipated by the dampers, which can avoid or reduce the damage caused by earthquake. However, the energy dissipation structure design is complex and the most domestic designers can not master it easily. In this paper, a simple and practicable design method for viscous damper dissipation structure by using the PKPM design software is proposed based on a 7-storey frame structure in highly seismic region. Firstly, lower half or one degree for the design intensity to design out an uncontrolled structure. Secondly, determine the supplemental damping ratio required for the fortification intensity via modal analysis method of PKPM software, and identify the numbers of the required dampers as well as their corresponding installation positions in line with the methods in the seismic code of China. Finally, the ETABS program is adopted to conduct the time-history analysis of the designed dissipation structure, showing that the proposed method in this paper can produce a satisfied result.
