Several procedures for non-linear static and dynamic analysis of structures have been developed in recent years. In this paper, the response spectrum analysis is performed on two different shapes i.e. regular and irre...Several procedures for non-linear static and dynamic analysis of structures have been developed in recent years. In this paper, the response spectrum analysis is performed on two different shapes i.e. regular and irregular shape of structure by using STAAD PRO. And the comparison results are studied and compared accounting for the earthquake characteristics and the structure dynamic characteristics. As the results show that the earthquake response peak values and the main response frequencies are very close and comparable. It can be referred to by the engineering applications.展开更多
Broad band and very broad band (BB and VBB) records of Chinese Digital Seismograph Network (CDSN) from 65 earthquakes are used to calculate the horizontal relative displacement, relative velocity and absolute accelera...Broad band and very broad band (BB and VBB) records of Chinese Digital Seismograph Network (CDSN) from 65 earthquakes are used to calculate the horizontal relative displacement, relative velocity and absolute acceleration response spectra with critical damping ratio ζ =0.005, 0.01, 0.02, 0.05 and 0.10, respectively. The results show that it is insufficient to obtain the credible characteristics of long-period ground motion response spectra only with the common ground acceleration records in engineering, while the broad band records of CDSN, as an important supplementary to ground acceleration records, can be used to study the characteristics of long-period ground motion response spectra.展开更多
The reflecting Schmidt plate system of the large sky area multi-object fiberspectroscopic telescope (LAMOST) serves active optical correction with a reflecting surface ofsegmented mirror. An azimuth-altitude mounting ...The reflecting Schmidt plate system of the large sky area multi-object fiberspectroscopic telescope (LAMOST) serves active optical correction with a reflecting surface ofsegmented mirror. An azimuth-altitude mounting is adopted with two self-aligning ball bearings foraltitude axis and hydrostatic bearings for azimuth. With static and modal analyses, finite elementmodeling of the full Schmidt plate system is discussed. Conventional seismic response spectrum hasbeen adapted for particular application for telescope engineering before a seismic response spectrumanalysis is performed, and results have confirmed that the design of the reflecting Schmidt platemanifests good performance and can survive the seismic intensity of up to 7 magnitude specified bytechnical requirements.展开更多
文摘Several procedures for non-linear static and dynamic analysis of structures have been developed in recent years. In this paper, the response spectrum analysis is performed on two different shapes i.e. regular and irregular shape of structure by using STAAD PRO. And the comparison results are studied and compared accounting for the earthquake characteristics and the structure dynamic characteristics. As the results show that the earthquake response peak values and the main response frequencies are very close and comparable. It can be referred to by the engineering applications.
文摘Broad band and very broad band (BB and VBB) records of Chinese Digital Seismograph Network (CDSN) from 65 earthquakes are used to calculate the horizontal relative displacement, relative velocity and absolute acceleration response spectra with critical damping ratio ζ =0.005, 0.01, 0.02, 0.05 and 0.10, respectively. The results show that it is insufficient to obtain the credible characteristics of long-period ground motion response spectra only with the common ground acceleration records in engineering, while the broad band records of CDSN, as an important supplementary to ground acceleration records, can be used to study the characteristics of long-period ground motion response spectra.
基金This project is supported by National Key Project of China
文摘The reflecting Schmidt plate system of the large sky area multi-object fiberspectroscopic telescope (LAMOST) serves active optical correction with a reflecting surface ofsegmented mirror. An azimuth-altitude mounting is adopted with two self-aligning ball bearings foraltitude axis and hydrostatic bearings for azimuth. With static and modal analyses, finite elementmodeling of the full Schmidt plate system is discussed. Conventional seismic response spectrum hasbeen adapted for particular application for telescope engineering before a seismic response spectrumanalysis is performed, and results have confirmed that the design of the reflecting Schmidt platemanifests good performance and can survive the seismic intensity of up to 7 magnitude specified bytechnical requirements.
