条石砌体轴心受压性能试验研究

发布时间：2018-06-23 11:40

本文选题：条石砌体 + 干砌甩浆　；参考：《建筑结构学报》2017年12期

【摘要】：为研究条石砌体的轴心受压性能,进行了27个条石砌体试件的轴心受压试验。主要研究参数包括砂浆强度、砌体高厚比和砌筑方式(干砌甩浆和铺浆)等。通过试验分析了条石砌体在轴压力作用下的破坏特征和荷载-变形关系,研究了不同参数对条石砌体轴心受压承载力的影响。试验过程揭示条石砌体在轴压荷载作用下的破坏形态表现为水平灰缝受压破坏和条石砌块竖向折断,呈现脆性破坏特征。研究结果表明:当砌体高厚比不超过5.75时,在灰缝中配置更多垫片可提高干砌甩浆条石砌体的承载力;铺浆砌筑条石砌体的轴压刚度和承载力均高于干砌甩浆条石砌体。基于对试验结果的回归分析,提出了考虑砌体高厚比影响的干砌甩浆砌筑条石砌体轴压承载力的计算式,计算结果与试验结果吻合较好。
[Abstract]:In order to study the axial compression behavior of strip stone masonry, the axial compression tests of 27 specimens were carried out. The main research parameters include mortar strength, the ratio of height to thickness of masonry, and masonry methods (dry mortar throwing and mortar laying) and so on. The failure characteristics and load-deformation relationship of strip stone masonry under axial pressure are analyzed through experiments. The influence of different parameters on axial compression capacity of strip stone masonry is studied. The experimental results show that the failure patterns of striped stone masonry under axial compression load are compressive failure of horizontal gray joint and vertical fracture of stripe stone block, showing the characteristics of brittle failure. The results show that when the ratio of height to thickness of masonry is less than 5.75, the bearing capacity of dry masonry can be improved by adding more gaskets in the ash joint, and the axial compression stiffness and bearing capacity of the masonry are both higher than those of dry masonry. Based on the regression analysis of the test results, a formula for calculating the axial compressive capacity of dry masonry with jagged mortar considering the ratio of height to thickness of masonry is proposed. The calculated results are in good agreement with the experimental results.
【作者单位】：华侨大学土木工程学院;华侨大学福建省结构工程与防灾重点实验室;
【基金】：“十二五”国家科技支撑计划(2015BAL03B03)
【分类号】：TU364

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