基于整体-局部弯曲模型的钢-混凝土组合梁界面滑移及其效应分析

提出了具有界面滑移的钢-混凝土组合梁截面弯矩由不考虑滑移的整体梁承担整体弯矩和自由滑移的叠合梁承担局部弯矩的整体-局部弯曲模型。基于Bernoulli梁理论和抗剪连接件线性剪力-滑移模型,建立了截面弯矩及剪力分配的计算方法,得到了整体-局部弯曲模型计算界面滑移及考虑界面滑移的截面应力和梁弯曲挠度的公式,并给出了集中荷载作用下简支组合梁的栓钉剪力及界面滑移计算公式。

ANALYSIS ON INTERFACE SLIP OF STEEL-CONCRETE COMPOSITE BEAMS AND ITS EFFECT BASED ON GLOBAL-LOCAL BENDING MODEL

A model for analyzing the interface slip of steel-concrete composite beams is presented in this paper. In the model, the total moment of the composite beam with interface slip consists of the local moment carried by superposition beam with free interface slip and the global moment carried by the composite beam without interface slip. A method to calculate the distribution of the section moment and the shear force is established. The formulas for the intersection slip in the global-local model and those for the cross section stress and deflection of the beam considering the slip of interface are obtained based on Bernoulli beam theory and the linear shear-slip model of the shear connector. As an example, the shear force of the bolt-connector and the interface slip are given for simply supported beams under concentrated loading.