独塔自锚式悬索桥施工过程索力变化规律试验研究

为了研究独塔自锚式悬索桥施工过程索力变化规律,依据北京密云县云蒙大桥1/20比例的整桥缩尺模型试验,针对独塔双跨自锚式悬索桥的施工过程进行了模拟试验研究,对比了5种常见的吊杆张拉方案,揭示了自锚式悬索桥体系转换过程索力的变化规律,经过综合分析选择二次张拉方案作为比较合理的施工方案.同时建立了该桥的有限元数值模型,通过对比分析得到一致的规律,对于同类桥梁的设计和施工控制提供了可借鉴的试验依据.

Experimental Study on Tension Variation in Suspenders of Self-anchored Suspension Bridge With Single-tower During Construction Process

In order to study the tension variations in the self-anchored suspension bridge, based on the 1/20 scale model test of Yunmeng bridge in Miyun Beijing, the construction process of the self-anchored suspension bridge with single-tower was investigated in this paper. Five kinds of suspender stretching schemes were compared. The tension variations in the suspenders were presented during the construction process based on the structural system transformation of self-anchored suspension bridge with single-tower. The results showed that the second stretching scheme is more feasible for the construction process. The FEM numerical model of the self-anchored suspension bridge was established and its results were analyzed against the experimental data, which showed the similar variation trend. The conclusions could provide some valuable experimental references for the design of the same type of bridge and its construction control.