Time filter

Source Type

Beijing, China

Chen M.,Central South University of forestry and Technology | He G.,Central South University of forestry and Technology | Liu C.,CCDI Group
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology)

An optimum energy dissipation design method of frame-shear wall structure was proposed based on the theory of base isolation. Two commercial structural analysis softwares and two sets of actual seismic records and one set of artificial acceleration time-history curve were adopted to conduct linear and nonlinear time-history analysis for a 17-floor frame shear wall structure equipped with energy dissipation devices respectively. The results show that the method considers the viscous dampers installed in the axis without shear wall and the bottom floors of the structure, and the number of floors can be determined by the site characteristic period. The bottom storey is called isolation layer, when the fundamental period of isolation layer is equal to the site characteristic period, the effects of vibration reduction are perfect. The fundamental period of isolation layer can't be calculated from the total rigidity of isolation layer frame and shear wall, but the contribution of shear wall shall also be considered. The method is reliable and rational with an effective optimum result. Source

Xu X.,Beijing Jiaotong University | Xu X.,CCDI Group | Yang N.,Beijing Jiaotong University
Beijing Jiaotong Daxue Xuebao/Journal of Beijing Jiaotong University

The behavior of steel frame with opening in beam web considering the effect of composite action is been analyzed using the Pushover analysis method in this paper. In order to contrast, we select four types of steel frame, respectively, according to whether there are concrete slabs and the opening in beam web. These frames are modeled and calculated using the SAP2000 finite element software. The plastic hinge model define of the joints is from the existing research results. Pushover curves, displacements and the distribution of plastic hinges of the different structures under two lateral load distribution pattern are calculated. The results show that, the composite action of concrete slab might increase the strength and bearing capacity of the structure and the weakening on the performance of the whole structure due to the opening in beam web is very small. Source

Chen M.,Central South University of forestry and Technology | He G.,Central South University of forestry and Technology | Liu C.,CCDI Group | Zou Y.,Hunan University
Tumu Jianzhu yu Huanjing Gongcheng/Journal of Civil, Architectural and Environmental Engineering

An optimal distribution strategy of the energy dissipation dampers installed in the bottom stories of frame structures was put forward based on dynamic characteristics of base-isolated system. Firstly, the number of stories was defined by calculating the ratio of site characteristic frequency ω and bottom isolation stories natural frequency ωn of energy dissipation structure. Then, with regard to storey drift permissible value, the quantity and installation positions of dampers were defined through several simple calculations. 2 sets of actual strong earthquake records and 1 set of artificial acceleration time-history curve for a 10 stories frame structure were selected to conduct the time-history analysis under frequently and rarely earthquakes by ETABS software and Perform-3D software. The results show that the dynamic characteristics of energy dissipation structure in which the dampers are installed in lower stories are similar to those of base-isolated system. Source

Tu J.W.,Hubei Engineering University | Que G.,CCDI Group | Tu B.,Hubei Engineering University | Xu J.Y.,Hubei Engineering University
International Journal of Civil Engineering

Coupled vibrations may occur between ship lift structure and the ship chamber during seismic process due to the ship chamber being hung at the roof of the ship lift. An investigation is carried out to explore the possibility of using different devices to connect the ship lift towers and the ship chamber to prevent the coupled vibrations. A three-dimensional shell finite element model is established, and then simplified into a three-dimensional truss finite element model through dynamic equivalent principle. And the numerical model of coupled vibration analysis is formed through static condensation, calculating the coupled vibration response between the ship lift structure and the ship chamber under five connection conditions: no connection, rigid connection, spring, viscous liquid damper and magneto-rheological fluid damper. The result shows that no connection and rigid connection between them are both inadvisable; the magneto-rheological fluid damper provides better vibration damping effect if suitable semiactive control strategy is applied, in comparison with passive control devices. © Iran University of Science and Technology 2016. Source

Chong H.-Y.,Curtin University Australia | Wang J.,Curtin University Australia | Shou W.,Curtin University Australia | Wang X.,Curtin University Australia | Guo J.,CCDI Group
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

Poor facility management has been attributed to lack of coordination and information during the maintenance process. The need for high quality applies not only to construction works and workmanship, but is also for its subsequent coordination and maintenance of a building. The paper aims to improve quality and performance of maintenance by integrating an advanced technology with a managerial approach, namely, building information modelling (BIM) and facility management. A BIM case study was investigated, which was located in Shanghai, China. Five significant areas were identified to improve the quality and performance of facility management, namely, centralized system, visualization, simplification, modifiable system, and smart emergency escape. The results highlight the benefits in applying the integrated system between BIM and facility management. It draws an insightful inference in enhancing quality services in facility management. © Springer International Publishing Switzerland 2014. Source

Discover hidden collaborations