考虑虚拟横梁刚度的装配式空心板桥杆系有限元建模方法  

Finite Element Modeling Method for Prefabricated Hollow Slab Bridges Considering Virtual Cross Beam Stiffness

作　　者：赛志毅 姚望 韩洪超 陈康明[2] 李广奇 SAI Zhi-yi;YAO Wang;HAN Hong-chao;CHEN Kang-ming;LI Guang-qi(Shandong Hi-speed Company Limited,Jinan 250014,China;College of Civil Engineering,Fuzhou University,Fuzhou 350116,China;Shandong Transportation Institute,Jinan 250101,China)

机构地区：[1]山东高速股份有限公司,济南市250014 [2]福州大学土木工程学院,福州市350116 [3]山东省交通科学研究院,济南市250101

出　　处：《公路》2022年第9期211-217,共7页Highway

摘　　要：装配式空心板桥在我国中小跨径桥梁的建设中应用广泛,空心板桥的设计中常采用空间梁格法建立杆系有限元模型进行计算。为了研究装配式空心板桥的杆系有限元建模方法,进行了8 m跨径的5片空心板桥足尺模型试验,将试验结果与实体有限元分析结果对比分析,并且将考虑不同虚拟横梁刚度的杆系有限元分析结果与实体有限元分析结果对比分析。结果表明,实体有限元模型建模方法能较好模拟装配式空心板桥整个加载过程受力状态和横桥向传力性能;空心板桥杆系有限元建模时,8 m和10 m空心板桥的虚拟横梁高度取0.8倍铰槽深度,13 m和16 m空心板桥的虚拟横梁高度取0.6倍铰槽深度时,可得较精确的计算结果。Prefabricated hollow slab bridges are widely used in the small and medium span bridges in China.In the design of hollow slab Bridges,spatial grillage method is often used to establish finite element(FE) model by using the beam element.In order to study the FE modeling method of prefabricated hollow slab bridge,a full-scale model test of five hollow slab bridges with 8 m span is carried out,and the test results are compared with solid FE analysis results,and further the FE analysis results of rod system considering different stiffness of virtual beams are compared with solid FE analysis results.The results show that the solid FE modeling method presented can well simulate the loading process of prefabricated hollow slab bridge and the performance of force transmission in transverse direction.In the FE modeling of hollow slab bridge by using beam element,more accurate calculation results can be obtained when the height of virtual beam of 8 m and 10 m hollow slab bridges is 0.8 times the depth of hinge groove,and the height of 13 m and 16 m hollow slab bridges is 0.8 times the depth of hinge groove.

关 键 词：装配式空心板桥 杆系有限元分析 梁格法 实体有限元分析 横梁刚度 

分 类 号：U441.5:U448.213[建筑科学—桥梁与隧道工程]