Journal of Jilin University(Engineering and Technology Edition) ›› 2025, Vol. 55 ›› Issue (10): 3242-3252.doi: 10.13229/j.cnki.jdxbgxb.20240089

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Conceptual design and feasibility of ultra-high-performance steel-shelled concrete continuous rigid-frame bridge

Shi-ming LIU1,2(),Wei ZHANG2,Yin-ping MA3,Yong-jian LIU3()   

  1. 1.International Joint Research Lab for Eco-building Materials and Engineering of Henan，North China University of Water Resources and Electric Power，Zhengzhou 450045，China
    2.School of Civil Engineering and Communication，North China University of Water Resources and Electric Power，Zhengzhou 450045，China
    3.School of Civil Engineering，Chongqing University，Chongqing 400045，China
  • Received:2024-01-23 Online:2025-10-01 Published:2026-02-03
  • Contact: Yong-jian LIU E-mail:liushm@ncwu.edu.cn;liuyongjian@chd.edu.cn

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Abstract:

In this paper， a novel type of super-long-span continuous rigid-frame bridge was presented， ultra-high-performance steel-shelled concrete（UHP-SSC） continuous rigid-frame bridge with box girder， with steel shell filled with ultra-high-performance-concrete（UHPC） and perfobond leiste stiffeners（PBL） as fundamental components unit. UHP-SSC box girder employed UHPC to bear pressure， and steel shells bear tension， which may be used as the UHPC pouring non-removable formwork， allowing the light self-weight and high strength properties of steel and UHPC to be completely exploited. Conceptual design of the 400-meter-long continuous rigid-frame bridge with UHP-SSC box girder was studied， the results indicated that the thickness of top plate， bottom plate， and web plate of the UHP-SSC box girder can be greatly lowered. The suitable side-to-mid span ratio new continuous righid-frame bridge is 0.5~0.65， and the reasonable beam height ratio of the pier and midspan is 2.59~3.59， and the height of box girder at the pier accounts for 1/26~1/32 of the main span. The strength and stiffness of the new box girder meet the mechanical requirements of the code for fully prestressed concrete structure. The superstructure weight per square meter of UHP-SSC continuous rigid-frame bridge is reduced by approximately 132.8%， 76.8%， 324.4% and 338.3% respectively， when compared to mixed beam continuous rigid-frame bridge， arch bridge， cable-stayed bridge， and suspension bridge with similar span， and the carbon emissions are also reduced by about 28.5%， 57.1%， 14.1% and 55.7%. The superstructure cost of the new UHP-SSC continuous rigid frame bridge is increased by about 3.1% and 1.3% respectively， when compared to the mixed beam continuous rigid-frame bridge and arch bridge， and decreased by about 26% and 46.1% respectively， when compared to the cable-stayed bridge and suspension bridge. The new UHP-SSC continuous rigid-frame bridge has evident structural light self-weight properties， better economic and environmental performance， and has strong competitiveness in long-span beam bridges， as well as excellent technical popularization and application possibilities.

Key words: bridge engineering, box girder, ultra-high-performance steel-shelled concrete, continuous rigid-frame bridge, conceptual design

CLC Number: 

  • U448.23

Fig.1

Basic component unit of UHP-SSC box section"

Fig.2

Box section structure of UHP-SSC"

Fig.3

Design process of key parameters of UHP-SSC box girder"

Table 1

Material properties of UHPC"

强度等级弹性模量/GPa泊松比线膨胀系数徐变系数容重/（kN·m-3）轴向抗压强度/MPa轴向抗拉强度/MPa
fcu，kfckfcdftkftd
UC12045.00.21.1×10-50.2251208457.55.84

Fig.4

Finite element model of UHP-SSC continuous rigid-frame bridge"

Fig. 5

Relationship between UHP-SSC box girder’s side-to-mid span ratio and strain energy per unit length"

Fig.6

Relationship between deflection and ratio of beam height at pier to midspan"

Table 2

Maximum compressive stress of bottom slab at pier and midspan deflection of box-girder"

墩顶箱梁底板厚度/m最大压应力/MPa挠度/mm挠度与主跨跨径比
0.6-43.7-307.71/963
0.7-40.7-301.81/981
0.8-38.3-296.81/998
0.9-36.4-292.41/1 013
1.0-34.8-288.61/1 026
1.1-33.5-285.31/1 038
1.2-32.5-282.31/1 049
1.3-31.6-279.71/1 059
1.5-30.2-275.21/1 076

Fig.7

Relationship between thickness of bottom plateat pier of box-girder and the maximum compressive stress and midspan deflection"

Fig.8

Structure with pier and midspan section of UHP-SSC box-girder（unit： cm）"

Table 3

Comparison of superstructure’s main technical and economic indicators"

序号桥名（结构类型）跨径布置/m

桥宽

/m

上部结构混凝土用量/m3上部结构钢材用量/t上部结构总质量/t

上部结构

自质量/

（t·m-2）

上部结构造价/（万元·m-2）上部结构碳排放量/（t·m-2）
1本文（UHP-SSC连续刚构桥）230+400+230167 943.06 118.925 976.41.8881.2269.753
2重庆石板坡长江大桥复线桥（混合梁连续刚构桥）

87.85+4×138+

330+133.75

1932 332.011 332.092 162.04.3951.18812.536
3巫峡长江大桥（中承式钢管混凝土拱桥）460199 224.36 120.129 180.83.3391.21015.319
4干溪沟1号桥（斜拉桥）155+360+15527.155 297.87 251.7145 496.28.0131.54511.132
5红光大桥（自锚式悬索桥）3802529 179.05 672.078 619.58.2761.79115.190

Fig.9

Comparison of superstructure’s main technical and economic indicators of different types of bridge"

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