跨线连续钢—混组合梁桥负弯矩区抗裂措施设计与研究OA
Design and research on crack resistance measures in negative moment zone of continuous steel-concrete composite beam bridges
为改善跨线连续钢—混组合梁桥负弯矩区的受力性能以解决桥面板开裂问题,以深圳某高速改扩建工程4 ×85 m连续钢—混组合梁桥为研究对象.基于有限元法,研究增设预应力筋、支点升降法、后浇成型、微膨胀混凝土以及增大配筋率对负弯矩区桥面板抗裂性能的影响.结果表明:桥面板后浇成型可消除一期恒载引起的桥面板拉应力;支点升降法和预应力筋均能在桥面板中引入预压应力,有效降低桥面板的应力水平;增大配筋率只能减小最大裂缝宽度,当配筋率小于1.2％时,随着截面配筋率的…查看全部>>
To improve the stress performance in the negative moment zone of continuous steel-concrete composite beam bridges and address the problem of deck slab cracking,we conduct a research based on the design of a 4 ×85 m continuous steel-concrete composite beam bridge in a high-speed expansion project in Shenzhen.Using the finite element method,the study investigates the effects of adding prestressing tendons,support lifting method,post-casting,micro-expansive con…查看全部>>
周慧;成新
中交公路规划设计院有限公司,北京 100088中交公路规划设计院有限公司,北京 100088
交通运输
连续钢—混组合梁桥负弯矩区增设预应力筋支点升降法后浇成型微膨胀混凝土
continuous steel-concrete composite girder bridgenegative bending moment zoneadding prestressed reinforce-mentfulcrum lifting methodpost-pour moldingmicro expansion concrete
《南昌工程学院学报》 2024 (4)
41-47,7
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