钻孔法检测大型钢结构工作应力的研究

Hole-Drilling Method Used for Working Stress Examination in Large Steel Structure

为了实现对钢结构工作应力的检测,本文依据局部应力释放原理对钻孔法在其中的应用进行了研究.通过有限元计算对其中的应变释放系数A、B进行了修正,提出了能够修正钻孔温度效应和径向挤压等因素引起的附加应变的工作应力测试与计算方法,使钻孔法在检测中操作简便且具有较高的精度,从而实现了对大型钢结构工作应力的检测.

In this paper,the basic principles of hole- drilling were described and its application in the working stress examination of static loaded steel structure was explained in detail. To make the examination more simple and accurate,not only the parameters A and B value in this principle were calibrated by the finite element calculation but also a new calculation method of working stress that considering temperature effect and radial extrusion etc. was presented. These make hole- drilling method more suitable for the working stress examination of a large steel structure buildings which can not be applied any necessary testing load.