小西湖矮塔斜拉桥的特征参数研究

Investigation on Characteristic Parameter of Xiaoxihu Extradossed Bridge

结合小西湖双塔三跨斜拉桥活载作用下的结构反应,引入斜拉索荷载效应影响度的概念定量分析了矮塔斜拉桥斜拉索作用的实质,并据此提炼出能综合反映矮塔斜拉桥结构及受力特征的参数———矮塔斜拉桥特征参数;用斜拉索荷载效应影响度与矮塔斜拉桥特征参数的相关性定量描述矮塔斜拉桥的特点,对进一步认识矮塔斜拉桥的结构性能有一定的参考意义。

According to the structural reaction of a double pylons 3-span cable-stayed bridge under live load, a conception of ＂the influence degree of cables load effect＂ is put forward and used to quantitatively analyze real function of cables of extradossed bridges. In view of these analysis, the paper put forward a characteristic parameter ＂the characteristic parameter of extradossed bridges＂ which can comprehensively reflect the structural and mechanical properties of extradossed bridges. Using the coherency of ＂the influence degree of cables load effect＂ and ＂the characteristic parameter of extradossed bridges＂ , the paper quantitative descript the properties of extradossed bridges, the conclusions are valuable reference for further understand the properties of extradossed bridges.