苏州太平金融高层格构式树形柱轴压试验与数值分析  

Axial Compression Test and Numerical Analysis of Lattice Dendritic Columns in Suzhou Taiping Finance Building

作　　者：王静峰[1] 吴安旭 余曦 周文武 沈奇罕 WANG Jingfeng;WU Anxu;YU Xi;ZHOU Wenwu;SHEN Qihan(College of Civil Engineering,Hefei University of Technology,Hefei 230009,China;The Second Constructional Co.,Ltd.of China Construction Third Engineering Bureau,Wuhan 430074.China)

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009 [2]中建三局第二建设工程有限责任公司,武汉430074

出　　处：《建筑钢结构进展》2020年第6期120-127,共8页Progress in Steel Building Structures

摘　　要：为了获悉苏州太平金融高层格构式树形柱的轴压性能和破坏机理,对格构式树形柱缩尺试件展开了轴压试验研究。试验结果表明,格构式树形柱的轴压受力性能良好,试件破坏主要集中在分肢柱弯头处。利用ABAQUS有限元软件建立了格构式树形柱的数值分析模型,通过破坏模式和荷载-位移曲线验证了有限元分析模型的准确性。针对格构式树形柱在较大轴压荷载作用下分肢柱弯头处破坏的情况,提出了提高十字拉结梁高度、设置纵向隔板、填充混凝土等3种构造加强措施,并通过有限元分析验证了其改善效果。研究表明,在分肢柱弯头处提高十字拉结梁的方式可以有效提高格构式树形柱的刚度和轴压极限承载力,显著改善其受力性能,可以在实际工程中推广使用。In order to understand the axial compression performance and failure mechanism of lattice dendritic columns in Suzhou Taiping Finance Building,axial compression tests was conducted on a reduced-scaled model.The results show that lattice dendritic column has a good mechanical performance.The failure mainly happened on the bend of branches.The numerical analysis model of lattice dendritic column specimen was built using ABAQUS software.The accuracy of FE model was validated based on the failure mode and load-displacement curve.Three structural strengthening measures,raising the cross slanting beam,adding longitudinal board and filling concrete,were proposed to enhance the bend of branches concerning the serious failure happened on the bend of branches.The strengthening effects of axial compression performance of lattice dendritic column obtained from three structural strengthening measures were compared using the FE model.The results show that adding box-section cross straining-beam on bend of branches can improve initial stiffness and ultimate bearing capacity of lattice dendritic column and mechanical performance.The structural strengthening measures can be widely used in actual engineering projects.

关 键 词：格构式树形柱 轴压试验 破坏模式 数值分析 构造加强措施 

分 类 号：TU398[建筑科学—结构工程]