Due to widespread applications of adobe masonry construction in rural areas of many seismic-prone countries, there is a high demand for conducting research on retrofitting of adobe buildings; however, such research is scarce. Among various structural aspects, confinement of an assemblage of adobe (i.e., unbaked clay brick) units and mud mortar is of primary concern in the current paper. To this aim, scaled adobe columns were wrapped by polypropylene (PP) straps, which are low-strength and low-cost polymeric materials, and were tested under uniaxial compression. The PP straps are placed at a certain interval while the two ends of a strap are joined together by a steel wire. No bonding agent is used between the straps and adobe surface. Three series of adobe columns with different aspect ratios of the cross section and different arrangements of adobe units in the cross section plan are examined and the experimental results in terms of axial stress versus axial strain, crack patterns, lateral strain variations, and tensile strain in the confining straps are reported. The comparison between the non-retrofitted adobe specimens and their confined counterparts revealed that the proposed retrofit technique by use of PP straps is highly efficient in improving the compressive strength and, more importantly, the ultimate axial strain of adobe columns. Besides, the retrofitted adobe specimens could maintain a considerable amount of post-peak residual strength up to large axial displacements. Finally, the experimental outcomes on the compressive strength are compared with predictions of an equation available in the literature.

由于在许多地震多发国家的农村地区，土坯砌体建筑的广泛应用，对土坯建筑的翻新研究存在很高的需求。但是，这样的研究很少。在各种结构方面，目前主要关注的是土坯（即未烘烤的粘土砖）单元和泥浆的组合的限制。为此，用低强度和低成本聚合材料的聚丙烯（PP）绑带包裹了定标的土坯柱，并在单轴压缩下进行了测试。PP绑带以一定间隔放置，而绑带的两端通过钢丝连接在一起。表带和土坯表面之间不使用粘合剂。研究了横截面纵横比不同和横截面平面中不同的adobe单元的三个系列的adobe柱，并在轴向应力与轴向应变，裂纹模式，横向应变变化和拉伸应变方面进行了实验结果报告了约束带。比较未改造的土坯样本和密闭的土坯样本，发现使用PP带子提出的改造技术在提高抗压强度以及更重要的是改善土坯柱的最终轴向应变方面非常有效。此外，经过改造的土坯样品可以保持相当大的峰值后残余强度，直至出现较大的轴向位移。最后，