传统农居砌体抗剪性能试验研究

砖砌体结构是农村传统农居建筑的主要结构形式,如何精确评价其抗震能力具有重要的研究意义。目前既有传统农居中,20世纪80、90年代砖砌体结构仍是其重要的组成部分。为研究既有传统砖砌体结构的抗剪性能,首先对水泥砂浆、白灰砂浆、炉渣砂浆、黄泥砂浆4种典型砂浆开展抗压强度试验;然后对4种典型砂浆砌筑的砌体进行沿通缝抗剪强度试验,通过与传统老旧红砖砌体抗剪强度的平均值和公式值进行对比,对砌体抗剪强度计算公式进行修正后得到修正公式;最后对比修正值、标准值和设计值,对传统农居进行准确的砖砌体抗剪强度评估。本项研究主要为传统农居砖砌体结构的抗震性能评估、抗震加固以及抗震设计提供技术支持与科学依据。

Experimental Study on the Shear Behavior of Masonry Structures of Traditional Rural Buildings

Brick masonry structure is the main structural form of traditional rural buildings. Hence, the accurate evaluation of its seismic capacity is of important research significance. In this study, a compressive strength test was first carried out on four typical mortars (cement, lime, slag, and mud) to examine the shear performance of brick masonry structures. Second, a shear strength test along mortar joints was carried out on a brick masonry structure built with the four mortars. A modified formula of the masonry shear strength was obtained by comparing the average and formula values of the shear strength of traditional old red brick masonry structures. Finally, an accurate shear strength evaluation of brick masonry structures was carried out by comparing modified, standard, and design values. In this research, technical support and scientific basis for seismic performance evaluation, seismic strengthening, and seismic design of traditional rural brick masonry structures are mainly provided.