装配式T梁桥加固方法优化设计与稳定性分析

Optimization Design and Stability Analysis of Reinforcement Methods for Prefabricated T-Beam Bridges

针对现阶段装配式T梁桥的加固方案,采用元模拟软件对桥梁进行了建模,并提出了一种平行钢支撑加固方案。试验结果表明,该钢支撑方案在支撑钢管截面面积为64 cm^(2),支撑数量为28对时,一阶横、竖向自振频率分别为4.11 Hz、4.26 Hz;当钢支撑横截面积为300 cm^(2)时,其横、竖向自振频率分别为4.42 Hz、4.25 Hz。采用该支撑方案进行加固后,桥梁横向自振频率提高了34.77%,该方案不仅能提高梁体的横向刚度,还能提高桥梁的整体稳定性。

Aiming at the reinforcement scheme of fabricated T-beam bridge at present, the bridge is modeled by using the meta-simulation software, and a parallel steel support reinforcement scheme is proposed. The test results show that when the steel pipe section area is 64 cm~2and the number of supports is 28 pairs, the first-order transverse and vertical natural vibration frequencies are 4.11 Hz and 4.26 Hz respectively. When the cross-sectional area of the steel support is 300 cm~2, the transverse and vertical natural vibration frequencies are 4.42 Hz and 4.25 Hz respectively. After the reinforcement with this support scheme, the transverse natural vibration frequency of the bridge is increased by 34.77%. This scheme can not only improve the transverse stiffness of the beam, but also improve the overall stability of the bridge.