摘要：
Base on the traditional assumption, beam-to-column minor axis connections are usually considered either as perfectly rigid or as nominally pinned. In fact, many researches show that beam-to-column minor axis connections are often semi-rigid, and their performance greatly effects the internal force, displacement, and ultimate bearing capacity of the steel frames, which cannot be neglected. Welded joint, one type of beam-to-column minor axis connections, which is widely used in the engineering practice is researched. The finite element method was used to analysis the relationship between the parameter variation and the rotational initial stiffness of the connections. The results can be used as a reference to the designs of steel frames.
作者机构：
[Ren, S. Z.; He, G. J.] Cent South Univ Forestry & Technol, Coll Civil Engn & Mech, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Ren, S. Z.] C;Cent South Univ Forestry & Technol, Coll 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：
[Ren, S. Z.;He, G. J.] Cent South Univ Forestry & Technol, Coll Civil Engn & Mech, Changsha 410004, Hunan, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Construction enterprise;Engineering quality;Quality management
摘要：
Quality management was the key to the survival and development of construction enterprises. This paper discussed the construction enterprises should carry on the quality management at two levels of the internal quality management of construction enterprises and their construction project quality management, that could make construction enterprises to embark on a high-quality and efficient development road.
期刊：
Proceedings of the 6th International Conference on FRP Composites in Civil Engineering, CICE 2012,2012年
作者机构：
[He, Guojing; Xie, Lan] Central South University of Forestry and Technology, College of Civil Engineering and Mechanics, Changsha, Hunan, China
摘要：
This work deals with Li-Jia River medium bridge: the relevant MIDAS model has been used to analyse the seismic characteristics by changing geometric parameters. As a result, the law curves and the optimum value range have been carried out.
摘要：
Based on the horizontal and vertical components of a set of 30 acceleration records obtained from 10 near-fault earthquakes, the horizontal and the vertical response spectra are established, and have been compared with each other in this study. Statistical analyses show that, for the selected 30 acceleration records, the maximum mean of vertical acceleration spectra is slightly higher than which of horizontal acceleration spectra. That means the near-fault earthquake really have significant vertical effect. Consulting the domestic and international research achievement, the normalized near-fault design spectrum adapted to Chinese seismic design Code (GB50011-2010) is established in horizontal direction. The results show that, within short period range, the horizontal near-fault design spectrum obtained in this paper is obviously higher than which derived from Chinese seismic code. Subsequently, the spectra of horizontal components for the selected 30 records are each scaled to match the horizontal near-fault design spectrum at two periodic points of 1.0 and 1.5 sec respectively, and the corresponding vertical spectra are scaled with the horizontal spectra at the same time. The scaled results reveal that the vertical spectra have much higher discretion than horizontal spectra, hence the study in this paper could initiates the research interest to a new aspect concerned with the randomness of vertical spectra for near-fault ground motions, which would affect the seismic reliability of structures significantly.
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.
作者机构：
[Zhou, Liping; Zou, Zhongquan] School of Civil Engineering, Hunan University of Science and Technology, Qing Yuan Road,Tian Xin Distrist, Changsha, 411201, China;[He, Guojing] School of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Qing Yuan Road,Tian Xin Distrist, Chang Sha, 410004, China
通讯机构：
[Zou, Z.] S;School of Civil Engineering, Qing Yuan Road,Tian Xin Distrist, Changsha, 411201, China
会议名称：
1st International Conference on Civil Engineering, Architecture and Building Materials, CEABM 2011
期刊：
Applied Mechanics and Materials,2011年90-93:1785-1790 ISSN：1660-9336
通讯作者：
He, Guojing
作者机构：
[He, Guojing; Xie, Lan] Cent South Univ Forestry & Technol, Coll Civil Engn & Mech, Changsha, Hunan, Peoples R China.;[Xei, Fei] Res Inst Wuhan, Road & Bridge Design, Wuhan, Peoples R China.
通讯机构：
[He, Guojing] C;Cent South Univ Forestry & Technol, Coll Civil Engn & Mech, Changsha, Hunan, Peoples R China.
会议名称：
International Conference on Civil Engineering and Transportation (ICCET 2011)
会议时间：
OCT 14-16, 2011
会议地点：
Jinan, PEOPLES R CHINA
会议主办单位：
[He, Guojing;Xie, Lan] Cent South Univ Forestry & Technol, Coll Civil Engn & Mech, Changsha, Hunan, Peoples R China.^[Xei, Fei] Res Inst Wuhan, Road & Bridge Design, Wuhan, Peoples R China.
会议论文集名称：
Applied Mechanics and Materials
关键词：
Damage;Frequency perturbation;Localization;Modified modal strain energy method;Vibration mode
摘要：
The increase in axle load and speed, the worse of service environment and the deterioration of existing bridges result in various of damages in structures. In order to ensure the safety of the structure, it is essential to assess the performance of the structure. In this paper, based on the frequency changes of the damaged and undamaged structure, damage positioning indicator method was used to locate the damage of the structure. Damage assessment method (SSZD) based on modified modal strain energy method was used to assess the extent of structural damage. The results show that this method can be used to locate and assess the structural damage accurately.
摘要：
Energy-based modal pushover analysis method has been proved to be an appropriate approach to perform seismic analysis for structures whose high mode effect is not negligible. It directly establishes the capacity spectrum based on energy increments, which corrects the deficiency of conventional modal pushover method that the capacity curve would not be unique or even be retorted while the base shear-top displacement curve is established with respect to different reference nodes of the structure. In this paper, a continuous rigid frame bridge with tall piers in seismic zone is analyzed with EMPA method. The results showed that EMPA is more adaptable than conventional methods, and the seismic performance of the bridge can satisfy the demand of the design code.
关键词：
Big span Concrete-filled Steel Tubular Arch Bridge;Modal;Parameter identification;Wavelet transform
摘要：
It’s important to identify structural modal parameter in time and accurately for structural health monitoring and damage identification. Wavelet analysis is one of the various kinds of identification methods, which has been used in linear and nonlinear system response data since it can decompose signals simultaneously both in time-domain and frequency-domain with adaptive windows. In this paper, taking Bariba Bridge as an example, the modal analysis results obtained from the finite element model are compared with those estimated from the wavelet transform method. Good coincidence of results can be observed, which demonstrates that the built-up finite element model reflects the bridge’s real dynamic properties, and can serve as a baseline model for its dynamic response analysis under complicated excitations, long-term health monitoring and structural service state assessment.
