建筑膜结构荷载的超声快速测定方法

采用超声同面平测法研究了建筑膜材荷载与超声波传播速度之间的关系以及经纬向荷载比对超声法测定结果的影响,建立了超声法测试膜材经、纬向荷载的标准曲线,提出了利用现场同条件试件修正换算荷载值的方法。结果表明,超声法测试膜材荷载具有快速、准确的特点,经纬向荷载比对超声法测定结果没有影响。经过同条件试件修正以后超声法的平均相对误差可以减小到±15.50%,甚至小于±10%,完全能够满足工程测试的技术要求,从而显示出良好的应用前景。

FAST DETERMINATION OF LOADS OF BUILDING MEMBRANE STRUCTURES BY ULTRASONIC METHOD

Dependence of tension in membranes on the corresponding ultrasonic velocity and effects of radial tension/weft tension ratio on the test results of ultrasonic method were investigated.Standard curves were founded and a modificatory method was presented.Results show that membrane tensions can be conveniently determined by ultrasonic method with sufficient precision.The relative average deviations after modification can be reduced to ±15.50%,or even less than(±10%,) which can fully meet the technical requirements of engineering testings.