(1 湖南大学土木工程学院, 长沙 410082; 2 许昌学院土木工程学院, 许昌 461000; 3 许昌金科资源再生股份有限公司, 许昌 461000)

摘要: 为研究超薄灰缝烧结弃土高性能砌块砌体墙的抗震性能,以竖向压应力、芯柱数量、芯柱钢筋数量作为主要变量参数设计并制作了 4 个试件,对其进行水平低周反复加载试验。 分析该类新型墙体在拟静力荷载作用下的破坏过程和破坏形态,研究其承载力、滞回曲线、骨架曲线、延性、刚度退化、耗能性能等的影响。 试验结果表明:竖向压应力可明显影响墙体抗剪承载力、墙体刚度退化速率;芯柱和钢筋数量增加对提高墙体抗剪承载力有显著作用,同时充分发挥其对砌体墙的约束作用。 该类超薄灰缝烧结弃土高性能砌块砌体墙的抗震抗剪承载力满足规范和试验拟合公式的要求,可在乡镇地区推广使用。

关键词: 烧结弃土高性能砌块砌体墙; 刚度退化; 延性; 抗震性能

中图分类号:TU362 文献标志码:A 文章编号:1002-848X(2022)13-0140-07

DOI:10. 19701 / j. jzjg. 20201623

Experimental study on seismic behavior of high performance-spoil fired block masonry wall with ultra-thin mortar joint

XUAN Pengcheng1, ZENG Linghong1, HUANG Liang1, SHI Chuxian1, ZHANG Lei2, LI Fuan3, GAO Qi3

(1 College of Civil Engineering, Hunan University, Changsha 410082, China; 2 College of Civil Engineering, Xuchang University, Xuchang 461000, China; 3 Xuchang Jinke Resources Recycling Co. , Ltd. , Xuchang 461000, China)

Abstract: In order to study the seismic behavior of high performance-spoil fired block masonry wall with ultra-thin mortar joint, four specimens were designed and made considering the main variable parameters of the vertical compressive stress, the number of core columns, the number of steel bars of core column, and the horizontal low-cycle reversed loading test was carried out on them. The damage process and failure mode of this new type wall under quasi-static load were analyzed. The influence of load carrying capacity, hysteretic curve, skeleton curve, ductility, stiffness degradation and energy dissipation capacity were also studied. The test results indicate that the vertical compressive stress can significantly affect the shear capacity and the stiffness degradation rate of the wall. With the increasing of the numbers of core column and steel bars, the shear capacity of the wall are significantly enhanced. Meanwhile,its constraint on the masonry wall is fully exerted. The shear capacity of this high performance-spoil fired block masonry wall with ultra-thin mortar joint meets the requirements of the specification and test fitting formula, can be popularized and used in the vast number of villages and towns.

Keywords:high performance-spoil fired block masonry wall; stiffness degradation; ductility; seismic behavior