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(1 中國建筑設(shè)計(jì)研究院有限公司， 北京 100044；2 中冶建筑研究總院有限公司， 北京 100088；3 雄安高速鐵路有限公司， 保定 071700)
［摘要］為給工形鋼管柱在雄安站工程中的應(yīng)用提供技術(shù)支撐，通過縮尺模型試驗(yàn)，分析工形鋼管柱在水平往復(fù)荷載作用下的壓彎性能與破壞形態(tài)。采用ABAQUS對工形鋼管柱進(jìn)行數(shù)值模擬分析，分析雙腹板-翼緣寬度比、寬厚比以及高寬比等參數(shù)對其截面應(yīng)力、承載與變形能力的影響。結(jié)果表明：在水平往復(fù)荷載作用下，工形鋼管柱荷載-位移滯回曲線呈飽滿的梭形，變形與耗能能力較強(qiáng)；與平行腹板方向加載相比，平行翼緣方向加載時(shí)構(gòu)件的承載能力更強(qiáng)，剛度退化減緩，面外變形減小。箱形柱與工形鋼管柱根部的應(yīng)力集中顯著，易首先出現(xiàn)裂紋。平行腹板方向加載時(shí)，工形鋼管柱內(nèi)凹角部位的正應(yīng)力比箱形柱相應(yīng)部位的正應(yīng)力增大，出現(xiàn)顯著剪力滯后效應(yīng)。隨著雙腹板-翼緣寬度比減小，工形鋼管柱的承載力和變形能力逐漸增強(qiáng)，剛度退化率、等效黏滯阻尼系數(shù)、板件面外變形等均明顯減小，抗震性能總體上優(yōu)于相同壁厚的普通箱形柱。
［關(guān)鍵詞］雄安站；工形鋼管柱；抗震性能；承載能力；縮尺試驗(yàn)；ABAQUS
中圖分類號：TU391，TU375 文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2021)24-0026-09
Study on mechanical performance of concave box-section column in Xiong’an Railway Station
FAN Zhong1, CHEN Yuchen2, CHAI Huijuan1, HE Tao3, JIA Xuefang3, HU Shengjun3, WANG Qilong3, PENG Yongjie3
(1 China Architecture Design & Research Group, Beijing 100044， China；2 Central Research Institute of Building and Construction Co., Ltd., MCC Group, Beijing 100088， China；3 Xiong’an High-Speed Railway Co., Ltd., Baoding 071700， China)
Abstract: In order to provide reliable technical support for the application of the concave box-section columns in Xiong’an Railway Station, through the scaled model test, the compression-bending performance and failure pattern of the concave box-section columns under reciprocating horizontal loading were analyzed. ABAQUS was used to carry out numerical simulation analysis for the concave box-section columns, and the influence of the double web-flange width ratio, width-thickness ratio and height-width ratio on the section stress, bearing capacity and deformation capacity were analyzed.The results show that the concave box-section column has a full load-displacement ratio hysteresis curve under reciprocating horizontal loading, and has good deformation property and energy dissipation capacity. Compared with loading in the direction parallel to the web, the bearing capacity is higher, the rate of stiffness degrading is slower, and the out-of-plane deformation is smaller when loading in the direction parallel to the flange. Obvious stress concentration phenomenon exists in the bottom corners of both the box column and concave box-section column, so the crack easily occurs first. Under the horizontal force in the direction parallel to the web, the normal stress at the concave corner of the concave box-section column is larger than the according location of the box column, the shear lag effect is very significantly. As the double web-flange width ratio decrease, the bearing capacity and deformation ability of the concave box-section column gradually increase, the stiffness degradation, viscous damping coefficient, out-of-plane deformation all decrease obviously. The seismic performance of the concave box-section columns is generally better than the box columns with same wall thickness.
Keywords:Xiong’an Railway Station； concave box-section column； seismic performance； bearing capacity; scaled model test； ABAQUS
作者簡介：范重，博士，教授級高級工程師，全國工程勘察設(shè)計(jì)大師，一級注冊結(jié)構(gòu)工程師，Email:fanz@cadg.cn。
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