波形钢腹板部分斜拉桥合理结构体系  

Rational structural system of extradosed cable-stayed bridges with corrugated steel webs

作　　者：张建东[1,2] 赵兴宝 梁博 邓文琴 ZHANG Jiandong;ZHAO Xingbao;LIANG Bo;DENG Wenqin(College of Civil Engineering, Nanjing Tech University, Nanjing 211800, China;Jiangsu Transportation Research Institute Co. Ltd., Nanjing 210017, China;Shanxi Road & Bridge Construction Group Co. Ltd., Taiyuan 250001, China)

机构地区：[1]南京工业大学土木工程学院,江苏南京211800 [2]苏交科集团股份有限公司,江苏南京210017 [3]山西路桥建设集团有限公司,山西太原250001

出　　处：《南京工业大学学报（自然科学版）》2020年第6期797-803,共7页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金(51908282);江苏省自然科学基金青年基金(BK20190681);江苏省高等学校自然科学研究面上项目(19KJB580002)。

摘　　要：为明确波形钢腹板部分斜拉桥的合理结构体系,以某三塔四跨波形钢腹板部分斜拉桥为例,利用有限元模型分析索塔高度、无索区长度以及斜拉索与预应力筋配置比例等对结构力学性能的影响,并对比分析不同结构参数对其上部结构经济性的影响。结果表明:增大索塔高度可明显改善主梁的内力分布及结构的经济性;增加塔旁无索区长度,能够直接有效地减小跨中挠度,但会大幅度增加墩顶主梁截面的负弯矩;斜拉索数量的增加,可以改善主梁的受力性能,但是结构对索塔的刚度和强度要求也会随之增大。To clarify the rational structural system of extradosed cable-stayed bridge with corrugated steel webs,taking a three-towers and four-spans extradosed cable-stayed bridge with corrugated steel webs as an example.The effects of the height of towers,the length of cable-free zones and the ratio of stay cables and pre-stressed reinforcement on the mechanical properties of the structure were studied by the finite element analysis,and the effects of different structural parameters on the economics efficiency of the upper structure were also analyzed for comparison.Results indicated that increasing the height of towers obviously improved the internal force distribution of main girder and the economic efficiency of the structure.Increasing the length of cable-free zones next to the tower directly and effectively reduced the mid-span deflection,but it also greatly increased the negative bending moment of the main girder section near the top of pier.Increasing of the number of stay cables improved the mechanical performance of the main girder,but the stiffness and strength requirements of the tower also increased.

关 键 词：波形钢腹板 部分斜拉桥 合理结构体系 索塔高度 无索区长度 斜拉索数量 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]