不同耦联比的钢框架-联肢钢板墙抗震性能分析  

Seismic Performance of Steel Frame-Coupled Steel Plate Shear Wall Structures with Different Coupling Ratio

作　　者：谭智诚 陈麟[1] 吴轶[1] Zhicheng Tan;Lin Chen;Yi Wu(Department of Civil Engineering,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学土木工程学院,广州510006

出　　处：《钢结构（中英文）》2021年第7期9-17,共9页Steel Construction（Chinese & English）

基　　金：亚热带建筑科学国家重点实验室项目(2019ZB21)。

摘　　要：联肢钢板剪力墙是用连梁将两片钢板剪力墙连接起来形成的一种新型抗侧力体系。联肢钢板墙通过连梁与墙肢的相互作用,抵抗倾覆弯矩的能力和抗侧刚度得到提高。连梁是影响联肢钢板剪力墙抗震性能的关键构件,耦联比是衡量墙肢相互作用的重要参数。因此提出以耦联比为控制指标的设计方法,分别以20%、40%和60%的耦联比设计了3个20层的钢框架-联肢钢板墙结构。利用ABAQUS软件建立结构有限元模型,振型分解反应谱分析的结果表明:这三个模型的各项结构性能指标差别在5%以内,说明在设计地震剪力相同的情况下,采用以耦联比为控制指标的设计方法,可以设计出满足预期结构性能指标的钢框架-联肢钢板墙结构,且耦联比会影响联肢钢板墙的用钢量。联肢钢板剪力墙中,边框柱的用钢量远大于其他构件的用钢量。当设计地震剪力相同时,随着设计目标耦联比增大,连梁设计截面增大,连梁与墙肢的相互作用加强,可以减小内嵌钢板厚度,从而减小边框柱截面尺寸。而连梁的剪力和弯矩会随耦联比的增大而增大,连梁剪力增大会减小与之相连的边框内柱的轴力,但连梁弯矩增大会加大边框内柱的弯矩。因此耦联比增大到一定程度后,按压弯构件设计的边框内柱截面尺寸可能会不减反增。这3个模型中,40%耦联比模型的用钢量最少,经济性最好。选取7条地震波对这3个模型进行了时程分析。在多遇地震下,3个模型的基底剪力平均值基本相同。在罕遇地震下,40%耦联比模型的基底剪力平均值最大,层间位移角平均值却最小,说明结构进入塑性的程度较小,刚度退化没有另外两个模型明显。罕遇地震作用下,3个模型都是钢板首先进入塑性,耦联比越小,连梁的塑性发展就越深入;耦联比越大,钢板的塑性发展就越深入。60%耦联比模型的塑性耗能较大,其钢板的最大等效塑性应�Coupled steel plate shear wall is a new type of lateral force resisting system which is formed by connecting two steel plate shear walls with coupling beams.Through the interaction of coupling beam and wall limb,the capacity of resisting overturning moment and lateral stiffness of the coupled steel plate wall are improved.Coupling beam is the key component that affects the seismic performance of coupled steel plate shear wall,and coupling ratio is an important parameter to measure the wall limb interaction.Therefore,a design method with coupling ratio as control index is proposed.Three 20-story steel frame-coupled steel plate wall structures are designed with coupling ratios of 20%,40%and 60%,respectively.The finite element model of the structure is established by using ABAQUS software,and the results of mode-decomposition response spectrum analysis show that the difference of each structural performance index of the three models is less than 5%,which indicates that the steel frame-coupled steel plate wall structure can be designed to meet the expected structural performance by using the design method with coupling ratio as the control index under the same design seismic shear force.The coupling ratio will affect the steel consumption of steel plate wall.In the coupled steel plate shear wall,the steel consumption of frame column is much larger than that of other components.When the design seismic shear force is the same,with the increase of the design target coupling ratio,the design section of coupling beam increases,and the interaction between coupling beam and wall limb is strengthened,which can reduce the thickness of embedded steel plate and reduce the section size of frame column.On the other hand,the shear force and bending moment of coupling beam will increase with the increase of coupling ratio.The increase of coupling beam shear force will reduce the axial force of the frame inner column connected with it,but the increase of coupling beam bending moment will increase the bending moment of the frame inne

关 键 词：钢板剪力墙 联肢墙 耦联比 抗震性能 

分 类 号：TU352.11[建筑科学—结构工程] TU398.2