摘要
以金婺大桥边跨4号索换索方案为工程背景,将理论计算与实测相结合,研究单侧卸索(加支撑)、单侧卸索(不加支撑)、双侧卸索(加支撑)和双侧卸索(不加支撑)等卸索方案对斜拉索索力、主梁和桥塔的弯矩、位移及应力的影响。分析表明:单侧卸索会增加桥塔的弯矩,不加支撑也会增大主梁的弯矩。建议采用在边跨主梁和中跨主梁与4号索对应的横隔梁下加竖向支撑的双侧全松+全紧的换索方案。
Based on cable replacement of number 4cable of Jinwu bridge,theory calculation and measured data were combined.Some schemes were studied including unilateral cable replacement without sustainment,unilateral cable replacement with sustainment,symmetrical cable replacement with sustainment,symmetrical cable replacement without sustainment.How different schemes effect the cable force,the bend moment,displacement and stress of main beam and bridge tower were researched.The study showed bend moment of tower increased for unilateral cable replacement scheme and moment of main beam bend increased for cable replacement scheme without sustainment evidently.At last,symmetrical number 4cable replacement scheme with vertical sustainment were suggested and the sustainment was installed on transverse diaphragm of box beam corresponding to number 4cable.
出处
《钢结构》
2011年第1期55-59,共5页
Steel Construction
关键词
金婺大桥
换索方案
索力
有限元
bridge of Jinwu
cable replacement scheme
cable force
finite element
