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Finite‐element analysis of laminated rubber bearing of building frame under seismic excitation 
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下载免费PDF全文 Makoto Ohsaki Tomoshi Miyamura Masayuki Kohiyama Takuzo Yamashita Masashi Yamamoto Naohiro Nakamura 《地震工程与结构动力学》2015,44(11):1881-1898
Finite element analysis is carried out for a building frame supported by laminated rubber bearings to simultaneously investigate global displacement and local stress responses under seismic excitation. The frame members and the rubber bearings are discretized into hexahedral solid elements with more than 3 million degrees of freedom. The material property of rubber is represented by the Ogden model, and the frame is assumed to remain in elastic range. It is shown that the time histories of non‐uniform stress distribution and rocking behavior of the rubber bearings under a frame subjected to seismic excitation can be successfully evaluated, and detailed responses of base and frame can be evaluated through large‐scale finite element analysis. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
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Dynamic FE simulation of four‐story steel frame modeled by solid elements and its validation using results of full‐scale shake‐table test 下载免费PDF全文
下载免费PDF全文 Dynamic finite element analyses of a four‐story steel building frame modeled as a fine mesh of solid elements are performed using E‐Simulator, which is a parallel finite element analysis software package for precisely simulating collapse behaviors of civil and building structures. E‐Simulator is under development at the National Research Institute for Earth Science and Disaster Prevention (NIED), Japan. A full‐scale shake‐table test for a four‐story frame was conducted using E‐Defense at NIED, which is the largest shaking table in the world. A mesh of the entire structure of a four‐story frame with approximately 19 million degrees of freedom is constructed using solid elements. The density of the mesh is determined by referring to the results of elastic–plastic buckling analyses of a column of the frame using meshes of different densities. Therefore, the analysis model of the frame is well verified. Seismic response analyses under 60, 100, and 115% excitations of the JR Takatori record of the 1995 Hyogoken‐Nanbu earthquake are performed. Note that the simulation does not reproduce the collapse under the 100% excitation of the Takatori record in the E‐Defense test. Therefore, simulations for the 115% case are also performed. The results obtained by E‐Simulator are compared with those obtained by the E‐Defense full‐scale test in order to validate the results obtained by E‐Simulator. The shear forces and interstory drift angles of the first story obtained by the simulation and the test are in good agreement. Both the response of the entire frame and the local deformation as a result of elastic–plastic buckling are simulated simultaneously using E‐Simulator. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
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In this report, the capabilities of the adaptively shifted integration (ASI)‐Gauss code in the analysis of the seismic responses of framed structures are verified and validated by comparing the results with detailed numerical simulations performed by the parallel finite element analysis code, E‐Simulator, and with experimental results obtained by E‐Defense. The numerical results obtained by both codes showed good agreement with the experimental results obtained by E‐Defense. Furthermore, seismic waves with unnaturally large magnitudes are applied to a high‐rise building model to demonstrate the ability of the ASI‐Gauss code to analyze the collapse behaviors of building frames. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
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Setumi Miyamura 《Tectonophysics》1982,84(1):47-55
To describe an individual earthquake or the seismicity of a region, simple parameters such as magnitudes are necessary. In seismicity studies observations for as long as possible time intervals should be at disposal and subsequently the continuity of the parameters' quality should be guaranteed. MGR or MS can be such parameters. mb(sp) of USGS and ISC is another one, but it has been accumulated only since the 1960s. An international proposal to introduce or revive classical mb asks to change the traditional procedure of measuring the P maximum within a few seconds from the P onset. Some confusion appears to exist for recent mb-data in EDR of USGS. It is strongly hoped that the traditional procedure of USGS for mb(sp)-determination will not be discontinued and that the new mb will be introduced only as an additional parameter. 相似文献
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Dr. Setumi Miyamura 《Pure and Applied Geophysics》1951,20(1):24-26
Summary Frequency characteristics of a linear oscillator or a seismometer, whose equation of free oscillation is
+n
2
x=0, are usually represented by takingh(=/n) as parameters. In this case, however, the independent variable is the frequency of impressed force or displacement from outside on the oscillator. But, we often encounter those cases, where the frequencies from outside are constant, and the frequency of the oscillator or pick-up is to be changed, or the several oscillators with various frequencies are to be used. Then, of course,h cannot be taken as parameters, as they vary with the oscillator's frequencyn. The author here calculated the amplitude- and phase-characteristics for the latter case, taking
(=/n) as parameters and represented them in thick lines in the figures together with the ordinary ones in thin lines.
International language: Esperanto. 相似文献
Résumé On rencontre souvent des problèmes où divers oscillateurs dé périodes propres différentesT 0j et de même coefficient d'amortissement , sont attaqués par un phénomène sinusoïdal de périodeT. Les courbes classiques qui donnent l'amplitude et la phase du mouvement forcé en fonction du rapportT/T 0 pour différentes valeurs du paramètreh=T 0/2, ne peuvent alors être utilisées. Nous donnons ici les courbes correspondant à des valeurs différentes du paramètreh(=/n)= T/2.
International language: Esperanto. 相似文献
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S. Miyamura 《Physics of the Earth and Planetary Interiors》1974,8(2):167-176
A tentative amplitude distance calibrating function for PKP waves is obtained for the determination of short-period body-wave magnitudes of shallow earthquakes in the New Zealand and Macquarie Loop regions where magnitude estimates are less frequent than in other regions of the globe. The recalculation of magnitudes based on both P and PKP data improves the magnitude determination for the two regions significantly and it is recommended that PKP data collected in the Bulletin of the ISC be used for the magnitude determination in order to monitor the seismic events of the whole globe homogeneously. 相似文献
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