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(1 中南建筑設(shè)計(jì)院股份有限公司， 武漢 430071； 2 武漢理工大學(xué)建筑工程系， 武漢 430070;3 成都建材設(shè)計(jì)院， 成都 610051)
［摘要］錐形鋼管柱作為某些特定大跨空間結(jié)構(gòu)中重要的支撐構(gòu)件，其承載力及穩(wěn)定性的計(jì)算非常重要，但現(xiàn)有規(guī)范尚未給出如何考慮空間作用下錐形鋼管柱的計(jì)算長度及穩(wěn)定承載力的驗(yàn)算方法。從規(guī)范考慮整體空間作用下計(jì)算長度取值的基本理念出發(fā)，基于結(jié)構(gòu)彈性穩(wěn)定理論，利用有限元軟件大型結(jié)構(gòu)特征屈曲分析的優(yōu)勢，并結(jié)合現(xiàn)有規(guī)程對梭形柱等效計(jì)算長度系數(shù)的取值，提出了考慮空間作用下錐形鋼管柱穩(wěn)定性承載力及整體穩(wěn)定性的驗(yàn)算方法。并以某大型空間結(jié)構(gòu)工程為實(shí)例，選取典型目標(biāo)柱，給出了在不同荷載組合工況下整體穩(wěn)定性的驗(yàn)算方法。本方法是規(guī)范基本理念與先進(jìn)數(shù)值分析技術(shù)手段的結(jié)合與發(fā)展，為考慮空間作用的錐形柱計(jì)算長度的計(jì)算提供了有效和可靠的方法。
［關(guān)鍵詞］大跨結(jié)構(gòu)； 整體空間作用； 錐形鋼管柱； 穩(wěn)定性
中圖分類號：TU392-3文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)10-0051-07
Research on stability of conical steel tubular columns of large-span structures considering integral spatial action
Yuan Liming1, Wang Dahai2, Chen Nian1, Shi Qingyu3
(1 Central-south China Architectural Design Institute Co., Ltd., Wuhan 430071, China;2 Department of Building Engineering, Wuhan University of Technology, Wuhan 430070, China;3 Chengdu Building Materials Design Institute, Chengdu 610051, China)
Abstract:The calculation of bearing capacity and stability of conical steel tubular column is very important as an important supporting member in some special long-span spatial structures. However, the existing codes have not yet given a checking method for the effective length and stable bearing capacity of conical steel tubular column under spatial action. Starting from the basic idea of taking effective length into account in the code, a checking method for stability bearing capacity and overall stability of conical steel tubular columns under spatial action was proposed based on the theory of structural elastic stability, while taking advantage of the advantages of FEM software for large-scale structural characteristic buckling analysis and combining with the value of equivalent effective length coefficient of shuttle-shaped columns in existing codes. Taking a large-scale spatial structure as an example, the checking method of overall stability under different load combinations was given by selecting typical target columns. This method was the combination and development of the basic concepts and advanced numerical analysis techniques. It provided an effective and reliable method for calculating the effective length of conical columns considering spatial effects.
Keywords:large-span structure; integral spatial action; conical steel tubular column; stability
作者簡介：袁理明，學(xué)士，高級工程師，一級注冊結(jié)構(gòu)工程師，Email：175848388@qq.com。
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