【摘要】 南水北调中线工程常选用中、下承式拱桥或斜拉桥作为跨渠大桥。拉索是大跨中、下承式拱桥或斜拉桥中重要构件。拉索的张力对全桥的内力分布有重要影响,并反映了桥梁的健康状况。介绍了拉索张力测试方法特点与拉索张力影响因素。从考虑环境因素、改进刚度识别、考虑垂度和斜度、改进数据处理技术、拉索等效长度、数值分析与曲线拟合、考虑边界条件等方面介绍了提高拉索张力测试精度考虑因素,最后,对拉索张力测试研究可能的热点问题进行了一定的展望。更多还原

【Abstract】 The cable-stayed bridge or half through and through arch bridge are commonly selected as the cross ditch bridge in the central line of South to North Water Diversion Project. The cables are the most important components of a big span cable-stayed bridge or half through and through arch bridge. The tensions of the cables have great influence on the distribution of the internal forces of the whole bridge which reflects the health of the bridge. The test methods,characteristics and influencing factors of the cable tension were described in the study. Meanwhile,the measures of improving test precision were introduced from seven respects,including the environmental considerations,improvement of stiffness identification,consideration of sag and slope,improvement of data processing technology,equivalent length of the cable,numerical analysis and curve fitting as well as consideration of the boundary conditions. Finally,the possible hot issues in studies of cable tension test technology were forecasted.更多还原