基于試驗(yàn)的串聯(lián)隔震體系加固方法分析*
吳忠鐵1, 范萍萍2, 杜永峰3, 王曉琴1, 劉彥輝4
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（1 西北民族大學(xué)土木工程學(xué)院，蘭州 730050; 2 蘭州工業(yè)學(xué)院土木工程學(xué)院，蘭州 730050; 3 蘭州理工大學(xué)防震減災(zāi)研究所，蘭州 730050; 4 廣州大學(xué)工程抗震研究中心，廣州 510405）
［摘要］以串聯(lián)隔震體系的振動(dòng)臺(tái)試驗(yàn)為背景，分析了串聯(lián)隔震體系模型的破壞現(xiàn)象。根據(jù)其破壞的特點(diǎn)，用有限元軟件MARC對(duì)采用外包鋼法加固的串聯(lián)隔震體系進(jìn)行了分析，研究了5種加固方案下串聯(lián)隔震體系及鋼筋混凝土柱的荷載和位移關(guān)系，探討了加固長(zhǎng)度對(duì)鋼筋混凝土柱破壞時(shí)鉛芯橡膠支座變形的影響。研究表明：串聯(lián)隔震體系試驗(yàn)?zāi)Ｐ偷钠茐闹饕憩F(xiàn)為鋼筋混凝土柱的混凝土開裂和鋼筋的屈服。采用外包鋼法加固能明顯提高串聯(lián)隔震體系的抗震能力，隨著加固長(zhǎng)度的增大，抗震能力逐漸提高。當(dāng)以鉛芯橡膠支座的極限變形和鋼筋混凝土柱的屈服為設(shè)計(jì)目標(biāo)時(shí)，串聯(lián)隔震體系的加固長(zhǎng)度存在最優(yōu)值，本試驗(yàn)?zāi)Ｐ偷暮侠砑庸涕L(zhǎng)度比約為0.2。［關(guān)鍵詞］串聯(lián)隔震體系; 振動(dòng)臺(tái)試驗(yàn); 加固長(zhǎng)度; 外包鋼法; 極限變形中圖分類號(hào)：TU352.1 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2016)05-0086-05
Analysis of reinforcement method for test-based series seismic isolation systemWu Zhongtie1, Fan Pingping2, Du Yongfeng3, Wang Xiaoqin1, Liu Yanhui4(1 School of Civil Engineering, Northwest University for Nationalities, Lanzhou 730050, China; 2 School of Civil Engineering, Lanzhou Institute of Technology, Lanzhou 730050, China; 3 Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology, Lanzhou 730050, China; 4 Earthquake Engineering Research & Test Center of Guangzhou University, Guangzhou 510405, China)Abstract:Based on the shaking table test of series seismic isolation system, the damage phenomena of series seismic isolation system model were analyzed. Considering its damage characteristics, finite element software MARC was used to analyze the series seismic isolation system reinforced by wrapped steel outside method. Based on 5 reinforcement schemes, the relationship between force and displacement for series seismic isolation system and reinforcement concrete column was studied, and effect of reinforcement length on deformation of lead rubber bearing was studied when the reinforced concrete columns were damaged. The results show that the damages of series seismic isolation system model mainly feature concrete crack and rebar yield for reinforcement concrete column. Adoption of wrapped steel outside method can obviously improve seismic capacity of series seismic isolation system, and the seismic capacity increases gradually with increase of the reinforcement length. The reinforcement length for series seismic isolation system has the optimal value and the reasonable reinforcement length ratio is about 0.2 for the test model when the design objectives are selected as the ultimate deformation of lead rubber bearing and the yield of reinforcement concrete column.Keywords:series seismic isolation system; shaking table test; reinforcement length; wrapped steel outside method; ultimate deformation
*西北民族大學(xué)引進(jìn)人才科研項(xiàng)目資助（xbmuyjrc201405），西北民族大學(xué)中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金項(xiàng)目資助（31920150019），廣東省教育廳特色創(chuàng)新項(xiàng)目“廣州大學(xué)強(qiáng)校工程”（2014KTSCX094）。作者簡(jiǎn)介：吳忠鐵，博士，副教授，Email:wuzhongtie1982@163.com。
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