An equivalent single-layer theory for free vibration analysis of steel-concrete composite beams

IF 4 3区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Steel and Composite Structures Pub Date : 2021-01-01 DOI:10.12989/SCS.2021.38.3.281

Kaiyue Sun, N. Zhang, Xiao Liu, Yan Tao

引用次数: 2

Abstract

An equivalent single-layer theory (EST) is put forward for analyzing free vibrations of steel-concrete composite beams (SCCB) based on a higher-order beam theory. In the EST, the effect of partial interaction between sub-beams and the transverse shear deformation are taken into account. After using the interlaminar shear force continuity condition and the shear stress free conditions at the top and bottom surface, the displacement function of the EST does not contain the first derivatives of transverse displacement. Therefore, the C0 interpolation functions are just demanded during its finite element implementation. Finally, the EST is validated by comparing the results of two simply-supported steel-concrete composite beams which are tested in laboratory and calculated by ANSYS software. Then, the influencing factors for free vibrations of SCCB are analyzed, such as, different boundary conditions, depth to span ratio, high-order shear terms, and interfacial shear connector stiffness.

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钢-混凝土组合梁自由振动的等效单层理论

基于高阶梁理论，提出了分析钢-混凝土组合梁自由振动的等效单层理论。在EST中，考虑了子梁之间的局部相互作用和横向剪切变形的影响。在采用层间剪切力连续条件和上下表面无剪切应力条件后，EST的位移函数不包含横向位移的一阶导数。因此，在其有限元实现过程中正好需要C0插值函数。最后，通过对比两根钢-混凝土简支梁的室内试验结果和ANSYS软件计算结果，对EST进行了验证。然后，分析了不同边界条件、深跨比、高阶剪切项和界面剪切连接件刚度等因素对SCCB自由振动的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Steel and Composite Structures 工程技术-材料科学：复合

CiteScore

8.50

自引率

19.60%

发文量

审稿时长

7.5 months

期刊介绍： Steel & Composite Structures, An International Journal, provides and excellent publication channel which reports the up-to-date research developments in the steel structures and steel-concrete composite structures, and FRP plated structures from the international steel community. The research results reported in this journal address all the aspects of theoretical and experimental research, including Buckling/Stability, Fatigue/Fracture, Fire Performance, Connections, Frames/Bridges, Plates/Shells, Composite Structural Components, Hybrid Structures, Fabrication/Maintenance, Design Codes, Dynamics/Vibrations, Nonferrous Metal Structures, Non-metalic plates, Analytical Methods. The Journal specially wishes to bridge the gap between the theoretical developments and practical applications for the benefits of both academic researchers and practicing engineers. In this light, contributions from the practicing engineers are especially welcome.