钢管构造柱夯土墙抗震性能试验研究

SEISMIC BEHAVIOR OF RAMMED EARTH WALLS WITH THIN-WALLED STEEL TUBES

针对我国传统夯土建筑抗震性能不足的特点,提出一种采用薄壁钢管作为构造柱的夯土墙技术。试验共设计了4片墙体试件,素夯土墙作为对比试件,其余3片分别设有不同构造措施。基于对素夯土墙和内设钢管构造柱夯土墙进行低周反复加载试验,研究墙体在水平地震作用下的破坏过程和破坏形态。通过对滞回曲线、骨架曲线的分析,得出钢管构造柱对墙体抗震性能产生的影响。试验结果表明：内设钢管构造柱,拉结筋（圈梁）的墙体比传统夯土墙的承载力提高5倍,变形能力提高7倍。说明此类构造措施可有效增强夯土结构的整体性,提高其抗震能力。

In view of the lack of seismic capacity of the traditional rammed earth construction in China,the paper presented a new technique of rammed earth walls with thin-walled steel tubes. Four specimens,including a traditional rammed earth wall and three with thin-walled steel tubes,were designed. Based on the quasi-static test,the failure process and failure modes of walls were studied. Through hysteresis curves and skeleton curves,the influence of steel tubes on seismic behavior of the wall was obtained. The test results revealed that the bearing capacity and deformability of proposed rammed earth walls increased by 5 times and 7 times respectively in comparison with traditional rammed earth wall,indicating that the proposed structural measures could effectively enhance the integrity and seismic capacity of rammed earth construction.