Study on Static and Seismic Performances of Corrugated Steel Webs-UHPC Composite Continuous Box Girder Bridge

被引：0
|
作者：
Zhu P. [1 ,2 ]
Ding Z. [1 ]
Zhang Z. [3 ]
Shao X. [1 ,2 ]
机构：
[1] College of Civil Engineering, Hunan University, Changsha
[2] Key Laboratory for Wind and Bridge Engineering of Hunan Province, Hunan University, Changsha
[3] College of Civil Engineering, Hunan University of Technology, Zhuzhou
来源：
Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences | 2022年 / 49卷 / 11期
基金：
中国博士后科学基金;
关键词：
corrugated steel web（CSW）; natural vibration characteristics; reasonable girder depth range; seismic performance; static performance; ultra-high performance concrete（UHPC）;
D O I：
10.16339/j.cnki.hdxbzkb.2022116
中图分类号：
学科分类号：
摘要：
This paper develops a novel continuous composite box girder bridge by combining ultra-high performance concrete (UHPC) with corrugated steel webs (CSWs) to overcome the weaknesses of traditional long-span prestressed concrete (PC) continuous girder bridges, such as excessive dead load and deflection at the mid-span, and cracking in the webs. The static and seismic performances of the CSWs-UHPC continuous composite box girder bridge are investigated. And its dynamic performance is compared to that of CSWs-normal concrete (NC) and PC continuous composite box girder bridges. The results reveal that: when compared, respectively, with the CSWs-NC composite box girder bridges and PC box girder bridges, the dead load of the proposed composite structure is reduced by 45% and 54%, the CSWs-UHPC composite continuous box girder bridge is highly durable, economically competitive throughout its life cycle. The static properties of the developed CSWs-UHPC composite structure meet the requirements of the specification. The ratio of the reasonable girder depth at the support to the mid-span（Hs /L）is 1/16 ~ 1/22, and the ratio of the reasonable girder depth at the mid-span to that at the support（Hm /Hs）is 1/1.5 ~ (-0.2+ 0.029L/Hs）. The CSWs-UHPC composite box girder bridge has a lower natural vibration frequency of transverse bending than the PC box girder bridge and a slightly greater natural vibration frequency of vertical bending than both the CSWs-NC composite box girder bridge and the PC box girder bridge. The lighter superstructure significantly reduces the inertia load, which makes the CSWs-UHPC composite box girder have excellent seismic performance. This new type of composite bridge can effectively address the issues previously mentioned for conventional long-span continuous bridges, as well as drastically minimize the seismic response. It will thus be a bridge type with competitive advantages over the traditional long-span continuous girder bridges. © 2022 Hunan University. All rights reserved.
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页码：45 / 56
页数：11
相关论文
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