预应力空心板先简支后连续受力性能研究

Study on Stress Performance of Prestressed Hollow Slab with first Simple then Continuous Support

先简支后连续结构,不仅具有简支梁桥施工简便的优点,而且保证桥梁的行车平顺。本实验基于预应力空心板先简支后连续的结构特征和受力特点,进行荷载试验和极限承载能力的加载试验,同时与预应力简支空心板作对比试验。试验结果表明,先简支后连续结构明显优于桥面连续的结构。

The structure with first simple then continuous support not only has the advantage of easy construction as simple beam bridges, but also ensures the smooth traffic on the bridge. Based on the stress characteristics and structural features of prestressed hollow slab with first simple then continuous support, the load test and ultimate loading capacity test were carried out, at the same time, the prestressed hollow slab with simple support was tested for comparison. The test results showed that the structure with first simple then continuous support was clearly better than the structure with continuous bridge deck.