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针对砌体结构砖墙的基础托换问题,将钢夹梁和砖砌体视为弹性材料,基于经典Euler组合梁理论,建立了钢梁-砖砌体组合梁弯曲变形的控制方程,给出了砖砌体基础单段托换时,钢-砖砌体组合梁挠度和应力的表达式.在此基础上,考虑砖砌体的拱效应,得到了不同种类和型号钢夹梁的钢-砖砌体组合梁最大挠度和最大应力,以及基础单段托换的最大长度.结果表明:对于同类型形式的钢夹梁,其型号越大,钢-砖砌体组合梁的挠度和应力越小.同时,如钢夹梁高相同,工字钢-砖砌体组合梁单段托换最大长度将大于槽钢-砖砌体组合梁的单段托换最大长度,但钢-砖砌体组合梁紧箍压力变化很小.这些结果可为具体工程实践提供理论指导.
Considering the foundation underpinning problem of masonry brick wall, the steel sandwich beam and brick masonry are regarded as elastic materials. Based on the classical Euler composite beam theory, the governing equations of bending deformation of steel beam - Based on the above analysis, considering the arch effect of brick masonry, different kinds and types of steel beams with steel beams are obtained, The maximum deflection and the maximum stress of the brick composite beam and the maximum length of the basic single-section underpinning.The results show that for the same type of steel beam, the bigger the model is, the more the deflection and stress of the composite-steel beam In the meantime, the maximum length of single-section underpinning of the I-beam masonry composite girder will be greater than the maximum length of single-section underpinning of the channel-brick masonry composite beam, The confined pressure of the composite beam changes little, and these results can provide theoretical guidance for the specific engineering practice.