集中荷载作用下钢-混凝土组合梁界面滑移及变形

报道了8榀集中荷载作用下钢-混凝土组合简支梁的滑移规律和变形的试验结果。利用Goodman弹性夹层假设,推导了钢-混凝土组合简支梁的界面滑移和挠度变形的理论计算公式。该理论公式既能描述组合梁的界面滑移规律,又可以计算界面滑移对组合梁变形挠度的影响。利用通用有限元软件对钢-混凝土组合梁的界面滑移与变形进行了非线性有限元分析,并将多项计算结果进行了比较。通过大量理论计算,探讨工程设计中合适的剪力连接度。本文所得的理论计算公式,将方便工程设计人员对钢-混凝土组合结构滑移和变形挠度进行计算,并为其极限承载力的有限元计算提供了理论基础。

THE INTERFACE SLIP AND DEFORMATION OF STEEL- CONCRETE COMPOSITE BEAMS UNDER CONCENTRATED LOADS

The test results of interface slips distribution law of deformations of eight simplysupported steel-concrete composite beams under concentrated loads are presented in the paper. Using Goodman's elastic multiplyer hypothesis that the theoretical calculating formulae of interface slips and deformations of these structures are derived, which can not only describe the interface slips distribution law, but also can take account of its effect on deformations of composite beams. The general Finite Element software is used to carry out the non-linear Finite Element analysis for the interface sh'ps and deformations of steel-concrete composite beams, and the comparison between all calculating results is made. Through vast amount of theoretical calculations that the suitable linking degree of shearing force in engineering, design is probed. All theorectical calculating formulea in the paper will benefit the engineering designer to calculate the slips and deformations of steel-concrete composite structures, as well as, the theorectical basis for the Finite Element computation of ultimate limit bearing capacity of such structure is provided also.