This paper presents the study of a three-dimensional(3D) isolation system.Firstly,the authors investigated the effects of an innovative 3D isolator,which was composed of a connecting plate,a rubber pad for vibration i...This paper presents the study of a three-dimensional(3D) isolation system.Firstly,the authors investigated the effects of an innovative 3D isolator,which was composed of a connecting plate,a rubber pad for vibration isolation in the vertical direction and a horizontal rubber bearing for seismic isolation in both horizontal directions.Secondly,the authors designed such a vibration isolation system and installed it underneath two specific residential buildings which were built directly over an existing subway communication hub platform in Beijing.These buildings required good performance vibration and seismic isolation system to reduce the impact from the running of nearby subway trains.Finally,in situ tests were conducted for both the isolated and the non-isolated buildings for the purpose of comparison.The test results showed that the maximum acceleration response level of the isolated superstructure is reduced by 10% as compared to that of the platform.The maximum attenuation of vibration reaches up to 25 dB.The 3D system explored in this paper is very effective in control and suppression of building vibration induced by earthquakes or running of trains.展开更多
A tuned hybrid-tanks/mass damper ( THMD) system is presented in this paper,and the equation of motion of structure-THMD system is formulated. A phasic difference analysis method is also presented to analyze the dynami...A tuned hybrid-tanks/mass damper ( THMD) system is presented in this paper,and the equation of motion of structure-THMD system is formulated. A phasic difference analysis method is also presented to analyze the dynamic effect of water in hybrid-tanks composed of TLCD and TLD on the control performance of THMD system. Numerical simulation is conducted and performances of an ordinary TMD,TLD,TLCD and THMD are compared under wind and earthquake excitation,respectively. Results show that the designed THMD can achieve a performance level close to that of the ordinary TMD,and outperforms TLD and TLCD. As compared with the ordinary TMD,THMD is more economical and practical.展开更多
基金Supported by the National Natural Science Foundation of China (Grant No. 51078098,90915007,90815027 and 50878124)the Key Laboratory of Seismic Control & Structure Safety Open FundInnovation Group Fund of Guangdong Province
文摘This paper presents the study of a three-dimensional(3D) isolation system.Firstly,the authors investigated the effects of an innovative 3D isolator,which was composed of a connecting plate,a rubber pad for vibration isolation in the vertical direction and a horizontal rubber bearing for seismic isolation in both horizontal directions.Secondly,the authors designed such a vibration isolation system and installed it underneath two specific residential buildings which were built directly over an existing subway communication hub platform in Beijing.These buildings required good performance vibration and seismic isolation system to reduce the impact from the running of nearby subway trains.Finally,in situ tests were conducted for both the isolated and the non-isolated buildings for the purpose of comparison.The test results showed that the maximum acceleration response level of the isolated superstructure is reduced by 10% as compared to that of the platform.The maximum attenuation of vibration reaches up to 25 dB.The 3D system explored in this paper is very effective in control and suppression of building vibration induced by earthquakes or running of trains.
基金Sponsored by the National Natural Science Foundation of China(Grant No. 50608021)the Doctoral Fund of Ministry of Education of China(Grant No.20061078001)
文摘A tuned hybrid-tanks/mass damper ( THMD) system is presented in this paper,and the equation of motion of structure-THMD system is formulated. A phasic difference analysis method is also presented to analyze the dynamic effect of water in hybrid-tanks composed of TLCD and TLD on the control performance of THMD system. Numerical simulation is conducted and performances of an ordinary TMD,TLD,TLCD and THMD are compared under wind and earthquake excitation,respectively. Results show that the designed THMD can achieve a performance level close to that of the ordinary TMD,and outperforms TLD and TLCD. As compared with the ordinary TMD,THMD is more economical and practical.
