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(中機(jī)國(guó)際工程設(shè)計(jì)研究院有限責(zé)任公司， 長(zhǎng)沙 410007)

［摘要］長(zhǎng)沙綠地湖湘中心為滿足建筑底部無柱大空間的功能要求，設(shè)置了橫向轉(zhuǎn)換桁架與縱向轉(zhuǎn)換桁架進(jìn)行二次轉(zhuǎn)換，結(jié)構(gòu)形式較為復(fù)雜，存在多項(xiàng)不規(guī)則項(xiàng)。針對(duì)工程設(shè)計(jì)的難點(diǎn)和特點(diǎn)，通過合理的結(jié)構(gòu)布置、有效的加強(qiáng)措施及全面的結(jié)構(gòu)計(jì)算和分析，結(jié)構(gòu)能夠達(dá)到規(guī)范要求的抗震設(shè)防性能目標(biāo)，且保證轉(zhuǎn)換桁架承載力有一定富余。并對(duì)大跨度轉(zhuǎn)換結(jié)構(gòu)樓蓋舒適度進(jìn)行了研究，分析了樓蓋豎向振動(dòng)特性及其在單人行走激勵(lì)和多人有節(jié)奏運(yùn)動(dòng)激勵(lì)作用下樓蓋的動(dòng)力響應(yīng)，結(jié)果表明樓蓋豎向自振頻率和加速度均滿足舒適度要求。 

［關(guān)鍵詞］大跨度結(jié)構(gòu)；轉(zhuǎn)換桁架；樓蓋自振頻率；樓蓋舒適度 

中圖分類號(hào)：TU247-2 文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)21-0025-05

Design of large-span vertical and horizontal secondary truss conversion structure for Changsha Greenland Huxiang Center 

XIONG  Jiye,  WANG  Hailin,  CHEN  Jiancheng 

(China Machinery International Engineering Design & Research Institute  Co., Ltd., Changsha 410007， China) 

Abstract: In order to meet the functional requirements of a large space without columns at the bottom of the building, the Changsha Greenland Huxiang Center has set up horizontal conversion trusses and longitudinal conversion trusses for secondary conversion. The structure is complicated and there are many irregularities. In view of the difficulties and characteristics of the engineering design, reasonable structural layout, effective strengthening measures and comprehensive structural calculation and analysis were conducted to make the structure reach the seismic fortification performance target required by the code, and the transfer truss bearing capacity is guaranteed to have some surplus. The comfort of the large-span conversion structure floor was studied, the vertical vibration characteristics of the floor and the dynamic response of the floor under the excitation of single-person walking and multi-person rhythmic movement were analyzed. The results show that the vertical natural vibration frequency and acceleration of the floor meet the comfort requirements 

Keywords:large-span structure； transfer truss； floor natural frequency； floor comfort

作者簡(jiǎn)介：熊繼業(yè)，學(xué)士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:bestbear299@qq.com。