(四川大学建筑与环境学院， 成都 610065)

［摘要］烧结页岩空心砖是目前应用最为广泛的填充墙材料之一，但空心砖填充墙强度低、脆性大、抗震性能差，在近年发生的地震中都遭受了不同程度的震害。为评估目前建筑市场上不同孔洞形式空心砖的力学性能，揭示其易于震害的机理，本文选取四川地区广泛使用的三种孔洞形式的烧结页岩空心砖，考虑不同的受力面，对单砖进行了系统的力学性能试验研究。研究表明：空心砖不同受压面的抗压强度有着明显差异，均表现为顶面最高，条面次之，大面最小；孔洞形式对三个面的抗压强度均有影响，抗折强度亦与孔洞形式密切相关；空心砖的强度具有很大离散性，且其离散程度与孔洞形式及受压方向有关；所选取的三种孔洞形式的空心砖抗压强度很低，除顶面外，其余各面抗压强度等级均不足MU2.5，达不到规范要求；相较而言，空心砖顶面抗压强度相对稳定，离散性偏小，可靠性偏高。

［关键词］烧结页岩空心砖； 孔洞形式； 抗压强度； 抗折强度； 强度特征； Weibull统计

中图分类号： TU362 文献标识码： A文章编号：  1002-848X(2016)S1-1024-07

Experimental study on mechanical properties of sintered shale hollow brick

Su Liuyue, Li Bixiong, Mou Bingxiong

 (School of Architecture and Environment, Sichuan University, Chengdu 610065, China)

Abstract: The sintered shale hollow brick is widely used as infill wall materials of frame structures in China. These kind of infills were prone to be suffered various damages and had poor seismic performance during the recent earthquakes happened in Sichuan area due to low strength and typical brittleness. Three types of shale hollow bricks widely used were selected from a typical local brick factory in Sichuan, and various groups of compressive testings and bending testings were conducted to figure out the mechanical properties and reveal the mechanism of seismic vulnerability. The results show that, the compressive strength of single brick presented obvious difference in three loading direction; the hole form of hollow brick played a key role either on the compressive strength or on the bending strength; the compressive strength of brick loaded on the top face was the highest, the compressive strength of brick loaded on the large face was the lowest; both compressive strength and bending strength showed a great discreteness and a low reliability; the compressive strength of the hollow brick used in experiment was very low, not more than MU2.5, and could not meet the requirements of the related current codes; and the compressive strength loaded on the top face appeared less discreteness than those on the other two loading faces.

Keywords: sintered hollow brick; hole types; compressive strength; flexural strength; strength characte; Weibull statistics

作者简介： 苏柳月，硕士研究生，Email：lisa733@163.com。

*四川省应用基础计划（2014JY0186）。