砖砌体中建筑锚栓极限受拉承载力的实验研究

Experimental Study on Ultimate Tensile Bearing Capacity of Building Anchors in Brick Masonry

从分析膨胀型建筑锚栓在砖砌体中的受力形式出发,找到单根锚栓在砖砌体中可能出现的三种安装位置。采用墙体原型实验,分别对两个种类的建筑锚栓(膨胀型锚栓和化学螺栓)在两种砖砌体(实心砖墙和多孔砖墙)中的极限受拉承载力,首次进行了实验研究。实验发现,膨胀型锚栓全部发生了拔出破坏,化学螺栓发生了不规则锥体破坏。结果显示,膨胀型锚栓在实心砖墙和多孔砖墙中的极限受拉承载力基本一致,但均小于化学螺栓相应的测试值。基于对实验数据分布特征的统计分析,得到了建筑锚栓的平均极限承载力,从而为建筑锚栓在砖砌体中的应用提供了性能分析和优化设计的依据。

Starting with mechanical behavior analysis of building anchors in brick masonry, three installation positions of a single anchor were determined. Using wall prototype in-situ experiments, the ultimate tensile capacity tests of two kinds of building anchors （ expansion anchors and chemical bolts） in two kinds of brick masonries （solid brick and porous brick） were conducted for the first time. It was found that pullout failures occur in all expansion anchors, and irregular conical failures in ehemimal bolts. The results show that the ultimate tensile beating capacity of expansion anchors in solid brick masonry is similar to that in porous brick masonry ,wheares greater than the corresponding tested value for chemical bolts. Based on statistic analysis of distribution charaters of experimental data, the average ultimate bearing capacity of building anchors was obtained, and thus the base for performance analysis and optimization design for application of building anchors in brick masonry was established.