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（中國(guó)建筑西北設(shè)計(jì)研究院有限公司， 西安 710018）

［摘要］介紹了高烈度區(qū)某11層框架-剪力墻結(jié)構(gòu)基礎(chǔ)隔震設(shè)計(jì)的全過(guò)程。對(duì)隔震支座選型、上部結(jié)構(gòu)水平向減震系數(shù)取值、扭轉(zhuǎn)位移比控制、隔震層溫度變形驗(yàn)算等進(jìn)行了詳細(xì)介紹，著重討論了高烈度區(qū)高層結(jié)構(gòu)水平向減震系數(shù)偏大、隔震層扭轉(zhuǎn)位移比過(guò)大等難點(diǎn)問(wèn)題的處理方法。通過(guò)對(duì)隔震結(jié)構(gòu)模型與非隔震結(jié)構(gòu)模型側(cè)移模式進(jìn)行對(duì)比分析，探討了現(xiàn)行隔震結(jié)構(gòu)降度設(shè)計(jì)方法存在地震作用分布不合理，導(dǎo)致（極）大震作用下結(jié)構(gòu)底部存在薄弱層隱患的問(wèn)題。通過(guò)PERFORM 3D軟件對(duì)隔震結(jié)構(gòu)進(jìn)行了大震性能評(píng)估，證明結(jié)構(gòu)基本滿足大震可修的性能目標(biāo)。

［關(guān)鍵詞］高烈度區(qū)；框架-剪力墻結(jié)構(gòu)；基礎(chǔ)隔震；扭轉(zhuǎn)位移比；側(cè)移模式；薄弱層

中圖分類號(hào)：TU352-12文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)08-0008-06

Base isolation design and analysis of high-rise frame-shear wall structure in a high intensity area

XIN Li, YANG Qi, WANG Hongqun, JING Gang, ZOU Shengli

（China Northwest Building Design & Research Institute Co., Ltd., Xi’an 710018, China)

Abstract:The whole process that base isolation analysis of an eleven-layer frame-shear wall structure in a high intensity area was introduced. The selection of isolation bearing, the value of the horizontal seismic reduction factor of the superstructure, the control of torsion displacement ratio, and the calculation of the temperature deformation of the isolation layer were introduced in detail. The treatment such as the large horizontal seismic reduction factor and torsion displacement ratio of the isolation layer of high-rise structures in high intensity areas was emphasized. Through the comparative analysis of the lateral displacement model between the isolated structure model and the non-isolated structure model, it is discussed that the current seismic isolation structure reduction design method is unreasonable in the distribution of earthquake action, which leads to the hidden danger of weak layer at the bottom of the structure under the action of (very) rare earthquakes. The elasto-plastic time history analysis verifies the structure will be "life-safety" under rare earthquake. PERFORM 3D software was used to evaluate the seismic performance of the isolated structure, which proves that the structure basically meets the performance target of repairable for large earthquakes.

Keywords:high intensity area;frame-shear wall structure;base isolation;torsion displacement ratio;lateral displacement model;weak layer

*中國(guó)建筑股份有限公司科技研發(fā)課題（CSCEC-2015-Z-41）。

作者簡(jiǎn)介：辛力，博士，教授級(jí)高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email: xinli1129@sina.com。