FAST DETERMINATION OF LOADS OF BUILDING MEMBRANE STRUCTURES BY ULTRASONIC METHOD
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摘要: 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。Abstract: Dependence of tension in membranes on the corresponding ultrasonic velocity and effects of radial tensionP 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 151.50% , or even less than 10% , which can fully meet the technical requirements of engineering testings.
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Key words:
- tension membrane structures /
- ultrasonic method /
- ultrasonic velocity /
- radial tension /
- weft tension
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[2] 余红发. 混凝土非破损测强技术研究. 北京: 中国建材工业出版社, 1999 Liorens J I De. The Seventh International Workshop on the Design and Practical Realisation of Architecture Membrane Structures. Technical University Berlin, 2002 [3] CECS 02B 88 超声回弹综合法检测混凝土强度技术规程 [4] CECS 21B 90 超声法检测混凝土缺陷技术规程 [5] 蔡正 , 王足献. 正交设计在混凝土中的应用. 北京: 中国建筑工业出版社, 1985: 16-90
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