【摘要】 为克服采用弹簧单元模拟钢-混凝土组合结构的连接件时网格划分要顾及连接件位置的缺陷,提出了一种新型的带埋置弹簧界面单元模型。在该模型中,界面单元用于模拟钢板和混凝土之间的接触,弹簧用于模拟连接件的作用,可位于界面单元内任何位置。该模型既能合理考虑钢板与混凝土界面上的各种连接作用,又能使单元划分不受连接件位置的影响。推出试验模型和钢管混凝土拱桥拱脚等算例表明,该模型网格划分方便,计算精度较高,适用于实际工程的计算分析。更多还原

【Abstract】 A new interface element model with embedded spring is proposed to overcome the shortcomings that considers the position of connector in the mesh generation if the connector of steel-concrete composite structure is simulated by the spring element. In this model,the contact between the steel plate and the concrete is simulated by the interface element,and the action of connectors are simulated by the spring that can be located anywhere within the interface element. The model can not only consider various connections at the interface between the steel plate and the concrete reasonably,but also freely generate mesh without the influence from the position of connectors.The numerical simulations of push-out experiment and the arch foot of concrete-filled steel tube arch bridge show that the proposed model is convenient for mesh generation and of high calculating precision,which ensures the element model is suitable for the analysis of practical engineering.更多还原