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某高層鋼框架-中心支撐結(jié)構(gòu)分析與設(shè)計(jì)
路江龍1,2,石志響1,沈曉明1,2,朱尋焱1,2,李剛1,朱松松1
摘 要

(1 中衡設(shè)計(jì)集團(tuán)股份有限公司, 蘇州 215021;2 江蘇省生態(tài)建筑與復(fù)雜結(jié)構(gòu)工程技術(shù)研究中心, 蘇州 215021)

[摘要]以某高層鋼框架-中心支撐結(jié)構(gòu)為例,介紹了塔樓結(jié)構(gòu)方案的比選過程,確定了結(jié)構(gòu)的性能化設(shè)計(jì)目標(biāo)及抗震措施;采用YJK和ETABS兩種軟件對塔樓進(jìn)行分析對比得出,結(jié)構(gòu)各項(xiàng)整體指標(biāo)均滿足規(guī)范要求;采用時(shí)程分析法對結(jié)構(gòu)進(jìn)行多遇地震下的補(bǔ)充分析,對計(jì)算結(jié)果進(jìn)行包絡(luò)設(shè)計(jì);采用PERFORM-3D軟件對結(jié)構(gòu)進(jìn)行罕遇地震作用下的動力彈塑性時(shí)程分析。結(jié)果表明,結(jié)構(gòu)塑性發(fā)展程度可控,在進(jìn)入彈塑性受力階段后仍然具有較高的剛度和強(qiáng)度;采用ETABS,MIDAS Gen軟件對躍層斜撐抗側(cè)剛度、穿層柱屈曲進(jìn)行專項(xiàng)分析得出,結(jié)構(gòu)安全可靠。

[關(guān)鍵詞]鋼框架-中心支撐; 彈性時(shí)程分析; 動力彈塑性時(shí)程分析; 躍層斜撐; 穿層柱; 屈曲分析

中圖分類號:TU318文獻(xiàn)標(biāo)識碼:A文章編號:1002-848X(2019)01-0060-05

 

Structural analysis and design of a high-rise steel concentrically-braced frame

Lu Jianglong1,2, Shi Zhixiang1, Shen Xiaoming1,2, Zhu xunyan1,2, Li Gang1, Zhu Songsong1

(1 ARTS Group Co., Ltd., Suzhou 215021, China;2 Jiangsu Engineering Institute of Ecological Building & Complex Structure, Suzhou 215021, China)

Abstract:Taking a high-rise steel concentrically-braced frame structure as an example, the selection process of tower building structure schemes was introduced, and the performance-based design objectives and seismic measures were determined. YJK and ETABS softwares were used to analyze and compare the tower building, and it’s concluded that the overall indices of the structure meet the requirements of the code. The time-history analysis method was used to supplement the analysis of the structure under frequent earthquakes, and the envelope design of the calculation results was carried out. The PERFORM-3D software was used to carry out dynamic elastic-plastic analysis of the structure under rare earthquakes, and the results show that the degree of plasticity development of the structure is controllable and it still has high stiffness and strength after entering the stage of elastic-plastic mechanical loading. By using ETABS and MIDAS Gen softwares, special analyses were conducted on the lateral stiffness of floor-skipped brace and buckling of floor-skipped columns to conclude that the structure is safe and reliable.

Keywords:steel concentrically-braced frame; elastic time-history analysis; dynamic elastic-plastic time-history analysis; floor-skipped brace; floor-skipped cloumn; buckling analysis

 

作者簡介:路江龍,碩士,高級工程師,一級注冊結(jié)構(gòu)工程師,英國注冊結(jié)構(gòu)工程師,Email:lujianglong@artsgroup.cn。

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