非平穩(wěn)隨機(jī)地震作用下高層隔震結(jié)構(gòu)平-扭耦合效應(yīng)分析
王瑞棟，周春
- 摘 要
-
(上海建筑設(shè)計(jì)研究院有限公司, 上海 200041)[摘要] 將高層隔震不規(guī)則結(jié)構(gòu)簡(jiǎn)化為考慮平-扭振動(dòng)的多層剛片剪切模型，基于隔震支座的等效剛度和等效粘滯阻尼比建立了非平穩(wěn)隨機(jī)地震作用下單軸偏心結(jié)構(gòu)的隨機(jī)振動(dòng)方程。采用狀態(tài)空間法和虛擬激勵(lì)法對(duì)振動(dòng)方程進(jìn)行了解耦和求解。對(duì)某34層高層隔震結(jié)構(gòu)進(jìn)行了算例分析，并對(duì)相關(guān)參數(shù)進(jìn)行了研究，得到了一些有益的結(jié)論。研究表明，在隨機(jī)地震作用下隔震層存在偏心對(duì)結(jié)構(gòu)地震響應(yīng)具有顯著影響，會(huì)影響隔震層扭轉(zhuǎn)反應(yīng)，但不會(huì)削弱結(jié)構(gòu)隔震效果；上部結(jié)構(gòu)存在偏心對(duì)高層隔震結(jié)構(gòu)上部結(jié)構(gòu)的影響較大。[關(guān)鍵詞] 高層隔震結(jié)構(gòu)；非平穩(wěn)地震；平扭耦合; 狀態(tài)空間法；虛擬激勵(lì)法中圖分類(lèi)號(hào)：TU352.1 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2013)S1-1226-04作者簡(jiǎn)介：王瑞棟，碩士，wangrd@siadr.com.cn。周 春，學(xué)士，教授級(jí)高工，zhouchun@siadr.com.cn。Effect of Lateral-torsion coupling on seismic response of High-rise isolated structureunder non-stationary stochastic seismicWang Ruidong，Zhou Chun(Shanghai Institute of Architectural Design and Research Co., Ltd, Shanghai 200041, China)Abstract: The high-rise isolated structure with large aspect ratio simplified as calculation model of multi rigid layers considering shearing and torsion was established. Based on equivalent stiffness and damping of isolation, the equation of motion of single-direction eccentric calculation model under non-stationary stochastic seismic was presented, and decoupling and solution of the equation of motion were obtained using state space method and pseudo excitation method. A 34-story high-rise isolated structure was calculated by parametric analysis. Results showed that the effect of isolation eccentricity on rotation of high-rise isolated structure was significant, and seismic isolation effect was weakened, but torsion responses of superstructure were not influenced. Seismic isolation effect was more influenced by superstructure eccentricity.Key words: high-rise isolated structure, non-stationary stochastic, lateral-torsional coupling, state space method, pseudo excitation method
- 下載地址
-
你還沒(méi)注冊(cè)？或者沒(méi)有登錄？這篇論文要求至少是本站的注冊(cè)會(huì)員才能閱讀！
如果你還沒(méi)注冊(cè)，請(qǐng)趕緊點(diǎn)此注冊(cè)吧！
如果你已經(jīng)注冊(cè)但還沒(méi)登錄，請(qǐng)趕緊點(diǎn)此登錄吧！
