铰缝损伤及铺装层对空心板桥横向刚度的影响

Effect of paving layer on transverse stiffness of hollow slab bridge after joint damage

铰缝损伤是空心板桥梁较易出现的病害。为研究铺装层在铰缝损伤后对空心板桥梁横向刚度的影响,根据铰接板法理论,采用梁格法和Midas civil软件建立其有限元模型,对铰缝损伤后空心板桥梁的横向受力性能进行计算分析。研究结果表明:铺装层在空心板桥梁铰缝损伤后可起荷载横向传递的作用,提高了桥梁的横向受力性能,并且在多铰缝出现损伤时,提升效果更为明显;同时当铺装层厚度为10~20 cm时,铺装层厚度越大,桥梁的横向刚度越大,但对结构横向刚度的提升效果并不明显。

Hinge damage is a common problemin hollow slab bridge.In order to study the influence of paving layer on the lateral stiffness of hollow slab bridge after hinge joint damage,a finite element analysis model is established by using beam lattice method.The results show that after damage to the hinge joints of hollow slab bridges,the paving layer can act as a lateral load transfer,which improves the transverse force performance of bridges,And the lifting effect is even more pronounced when the damage occurs in multi-pass seams.At the same time,when the thickness of the paving layer is 10~20 cm,the greater the thickness of the paving layer,the greater the transverse stiffness of the bridge,however,the influence of the transverse stiffness on the structure is not obvious.