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（中國建筑西北設(shè)計(jì)研究院有限公司， 西安 710018）

［摘要］西咸新區(qū)1A樓，由于建筑的獨(dú)特造型，存在兩處高位長(zhǎng)懸挑結(jié)構(gòu)，最大懸挑長(zhǎng)度達(dá)到12.4m。采用豎向地震波對(duì)懸挑結(jié)構(gòu)進(jìn)行時(shí)程分析，對(duì)懸挑部位的豎向加速度分布和懸挑部分構(gòu)件軸力的豎向地震效應(yīng)等內(nèi)容進(jìn)行研究，從而對(duì)設(shè)計(jì)使用的豎向地震作用作定量的分析，給出懸挑部位的豎向地震效應(yīng)的設(shè)計(jì)值。對(duì)懸挑部分進(jìn)行中震彈性的性能化設(shè)計(jì)目標(biāo)，對(duì)懸挑結(jié)構(gòu)非常關(guān)鍵的幾榀斜撐進(jìn)行了防倒塌分析，以保證結(jié)構(gòu)的安全。

［關(guān)鍵詞］豎向地震； 懸挑桁架； 時(shí)程分析； 性能化設(shè)計(jì)； 防連續(xù)倒塌

中圖分類號(hào)：TU391文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)14-0025-04

Vertical earthquake analysis and key design points for cantilever structure of 1A building in  Xi-Xian New Area

ZHANG Tao, WANG Hongchen, CHU Ling

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

Abstract: Due to the unique shape of the building, there are two cantilevered structures with a maximum cantilever length of 12.4m in the high position of the building 1A in Xi-Xian New Area. The vertical seismic wave was used to conduct the time-history analysis of the cantilevered structure, and the vertical acceleration distribution of the cantilevered parts and the vertical seismic effect of the axial force of the cantilevered components were studied, so as to quantify the vertical seismic action used in the design and to provide the design value of the vertical seismic effect of the cantilevered part. The performance-based design objective of the earthquake-resistant elasticity of the cantilevered part, and the anti-progressive collapse analysis of several critical braces of the cantilevered structure were carried out to ensure the safety of the structure.

Keywords:vertical earthquake; cantilever truss; time-history analysis; performance-based design; anti-progressive collapse 

作者簡(jiǎn)介：張濤，碩士，高級(jí)工程師，Email：715022465@qq.com。