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(1 西安建筑科技大學(xué)土木工程學(xué)院，西安 710055； 2 青島理工大學(xué)土木工程學(xué)院，青島 266033)

［摘要］介紹了一模型比例為1/10的12層鋼筋混凝土框架結(jié)構(gòu)模型振動(dòng)臺(tái)試驗(yàn)，分析了模型結(jié)構(gòu)在不同地震水準(zhǔn)下的動(dòng)力反應(yīng)，并利用能力譜法、改進(jìn)的能力譜法、Pushover分析以及時(shí)程分析對(duì)原型結(jié)構(gòu)的抗震性能進(jìn)行對(duì)比分析，得到了結(jié)構(gòu)在不同加速度峰值作用下的性能點(diǎn)、頂層最大位移值、層間側(cè)移角以及塑性鉸分布情況。結(jié)果表明，該結(jié)構(gòu)在輸入加速度峰值為0.1g及0.2g工況時(shí)處于彈性階段或接近屈服。能力譜法在迭代計(jì)算過(guò)程中可能不收斂，而改進(jìn)的能力譜法則可以求出結(jié)構(gòu)在彈性以及彈塑性階段的性能點(diǎn)和頂層側(cè)移，但是與時(shí)程分析及試驗(yàn)結(jié)果比較誤差較大。在結(jié)構(gòu)屈服后，時(shí)程分析與試驗(yàn)結(jié)果相比也出現(xiàn)一定偏差，這可能是滯回模型的選擇和試驗(yàn)的離散性造成的。

［關(guān)鍵詞］振動(dòng)臺(tái)模型試驗(yàn)；?抗震性能；對(duì)比；能力譜法；改進(jìn)的能力譜法

Shaking table model test of a RC frame and its seismic performance contrasting analysis

Men Jinjie¹, Shi Qingxuan¹, Zhou Qi²(1 College of Civil Engineering，Xian University of Architecture and Technology, Xian 710055, China;

2 College of Civil Engineering, Qingdao Technological University, Qingdao 266033, China)

Abstract:Shaking table model test of a 1/10 scale reinforcement concrete frame with 12 stories is introduced. The failure mechanism and dynamic response of the model are analyzed. Based on capacity spectrum method, improved capacity spectrum method, pushover analysis and nonlinear time history (NTH) analysis to seismic behaviors of prototype frame are evaluated under four different peak ground acceleration values. The capability point, the roof displacement and the inter-story ratio are obtained. It is shown that the model is in elastic stage when the input peak ground acceleration values are 0.1g and 0.2g  It is worth noting that the capacity spectrum method maybe not converge in calculating the target displacement, and the improved capacity spectrum method can evaluated the target displacement whether the frame is in elastic stage or nonlinear stage, but it has a bad precision for high-rise building. After the frame yields, the roof displacement and inter-story ratio calculated by NTH analysis disagree with the test results, which maybe result from the selection of hysteric model and the dispersing of the test.

Keywords:shaking table model test; seismic performance analysis; capacity spectrum method; improved capacity spectrum method

*教育部博士點(diǎn)基金項(xiàng)目(20060703008)，國(guó)家自然科學(xué)基金項(xiàng)目(50778149)，陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃項(xiàng)目(2005E232)。