Research on Extending Span of Box Girder Bridge with Corrugated Steel Webs up to 300m

2019 ◽  
Author(s):  
Dong Xu ◽  
Xiangyong Duanmu ◽  
Yafan Zhou
Keyword(s):  
Limit State ◽  
Ultimate Limit State ◽  
Beam Model ◽  
Box Girder ◽  
Single Beam ◽  
Stability Performance ◽  
Rigid Frame ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
Under Construction

<p>In order to promote the application of steel-concrete composite structure in mountainous areas in China, a conceptual design for a PC continuous rigid frame box-girder bridge with corrugated steel webs and main span of 300 m was performed in the present paper. The combined corrugated steel web was proposed to increase the compressive area and improve the stability performance; thus, the self-weight of the composite box-girder bridge is significantly reduced. Flexural capacity of the whole section had been calculated with a single-beam model for the ultimate limit state (ULS). For the service limit state (SLS) design, the calculation for the composite box-girder bridge was conducted with the spatial grid model (SGM), from which 27 complete checking stresses in three layers (i.e. outside, inside and middle planes) of concrete plates and steel webs in every cross-section could be obtained. The stress history under construction stage was incorporated into the results obtained by SGM. Moreover, the stress states and stability performance for the composite box-girder bridge constructed were evaluated. The present investigation can provide references for the design and construction of the composite box-girder bridge with corrugated steel webs for long spans.</p>

Optimization on Closure Scheme of Multi-Span Prestressed Concrete Box-Girder Bridge

2010 ◽  
Vol 163-167 ◽  
pp. 2369-2375 ◽  
Author(s):  
Ming Yuan ◽  
Dong Huang Yan
Keyword(s):  
Stress State ◽  
Prestressed Concrete ◽  
Box Girder ◽  
Rigid Frame ◽  
Closure Scheme ◽  
Concrete Box Girder ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
Cantilever Construction ◽  
Rigid Frame Bridge

The stress state of finished bridge and service stage is influenced by various closure schemes in cantilever construction of multi-span prestressed concrete box-girder bridge. Two typical bridges—multi-span prestressed concrete continuous rigid frame bridge and girder bridge are investigated, The stress state in different closure schemes are analyzed using finite element(FE) analysis. Meanwhile, compared the healthy monitoring data, it has been found that taking the closure sequence from side span to middle span in cantilever construction of multi-span prestressed concrete box-girder bridge can lower stress of girder and pier in finished bridge stage, as well as reducing deformation of girder in service stage. Hence, the closure sequence from side span to middle span is more suitable for cantilever construction of multi-span prestressed concrete box-girder bridge.

Vibro-acoustic analysis of a rail transit continuous rigid frame box girder bridge based on a hybrid WFE-2D BE method

2020 ◽  
Vol 157 ◽  
pp. 107028
Author(s):  
Lizhong Song ◽  
Xiaozhen Li ◽  
Jing Zheng ◽  
Min Guo ◽  
Xinxin Wang
Keyword(s):  
Acoustic Analysis ◽  
Rail Transit ◽  
Box Girder ◽  
Rigid Frame ◽  
Box Girder Bridge ◽  
Girder Bridge

Investigation of Temperature Effects of Box-Girder Bridge in Typical Winter Weather of QINGHAI-TIBET Plateau

2012 ◽  
Vol 178-181 ◽  
pp. 2117-2120
Author(s):  
Hao Su Liu ◽  
Jun Dong ◽  
Tian Liang ◽  
Zhi Gang Qi ◽  
Xue Jian Xiang
Keyword(s):  
Temperature Fields ◽  
Tibet Plateau ◽  
Winter Weather ◽  
Box Girder ◽  
Weather Information ◽  
Basic Parameters ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
Under Construction ◽  
Qinghai Tibet Plateau

Based on the engineering background as which a box-girder bridge under construction in typical winter weather of Qinghai-Tibet plateau is chosen, a diffusion equation of temperature of the structure has been established, whose choices of initial and boundary conditions are discussed according to the field monitoring data and local weather information including solar radiation and air convection. Secondly, some tests of numerical simulation have been done by FEM software, and related parameters of the model are obtained. Finally, based on the determinate parameters, the temperature fields of another box-girder bridge are simulated, which agree with the measured data in the field. All these show that the investigation is not only providing basic parameters for temperature loading in the control of construction process of the bridge, but also providing significant reference for the design and construction of the same kind of bridges in typical winter weather of Qinghai-Tibet plateau.

A Comparative Research on Thermal Stresses Calculated from Different Element Models of a Concrete Continuous Box-Girder Bridge

2008 ◽  
Vol 400-402 ◽  
pp. 923-928
Author(s):  
Feng Xu ◽  
Bo Wang ◽  
Hai Long Zhang
Keyword(s):  
Thermal Stress ◽  
Thermal Stresses ◽  
Element Model ◽  
Numerical Results ◽  
Solid Model ◽  
Beam Model ◽  
Bridge Design ◽  
Box Girder ◽  
Box Girder Bridge ◽  
Girder Bridge

According to the definition about the positive and negative gradient temperature distribution of structural cross section in the Chinese bridge design specification of General Code for Design of Highway Bridge and Culverts (JTG D60-2004), same temperature loads are applied to beam model and solid model of a typical there-span prestressed concrete continuous box-girder bridge to compare the numerical results of thermal stresses calculated from the two finite element models. The beam model is built through professional software Doctor Bridge that is prevailing in China for structural static analysis of bridge design, while the solid model is built using ANSYS. Between the two models, the numerical results of total thermal stress regarded to be added up with self-restrained stress and secondary stress are compared. The results from solid model are found to be much more conservative than from element model. The identity and diversity of the two series of results and the reasons for the generation of the diversity are expounded. It is recommended that the thermal stress calculated from solid model be better to be taken into account in a design so as to examine or amend the results that calculated through the professional software based on bar system FEM theory.

Development of Techniques for the Construction of PC Composite Box-Girder Bridge with Corrugated Steel Webs

2014 ◽  
Vol 501-504 ◽  
pp. 1182-1186 ◽  
Author(s):  
Kong Jian Shen ◽  
Pei Feng Li ◽  
Qiao Wang ◽  
Shui Wan
Keyword(s):  
Box Girder ◽  
Construction Methods ◽  
Rigid Frame ◽  
Construction Techniques ◽  
Continuous Girder Bridge ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
Cantilever Construction ◽  
Beam Bridge ◽  
Rigid Frame Bridge

This paper presents a survey of construction techniques for pre-stressed concrete (PC) box-girder bridge with corrugated steel webs in recent decades. The structural forms of the bridge have experienced simply supported beam bridge, continuous girder bridge, cable-stayed bridge and the continuous rigid frame bridge. Meanwhile, the construction technologies were constantly innovated, including cast-in-situ, precast and the combination of them. The processing and installation technologies of corrugated steel webs and several typical construction techniques for PC box-girder with corrugated steel webs were elaborated, such as full framing construction, cantilever construction, span-by-span construction, incremental launching construction and some other various innovative ways. The valuable experiences in a variety of construction methods were summed up. The results show that some innovative construction ways should be developed by fully utilizing the corrugated steel webs as a guide beam or a work platform to improve the efficiency of construction.

scholarly journals Elaborate Modeling and Fragility Assessment of a Multiframe PC Box-Girder Bridge with Intermediate Hinges in California

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Tong Wu ◽  
Zhan Li ◽  
Shengchun Liu
Keyword(s):  
Fragility Curves ◽  
Limit State ◽  
Time History ◽  
Nonlinear Time History Analysis ◽  
Model Parameters ◽  
Demand Model ◽  
Nonlinear Dynamic Model ◽  
Box Girder ◽  
Box Girder Bridge ◽  
Girder Bridge

Multiframe PC box-girder bridge with intermediate hinges is a kind of bridge having complex structural characters, which is very quintessential in California. In this study, a typical bridge was adopted to establish a nonlinear dynamic model through OpenSees platform. Intermediate hinge and inhibiting devices in it were elaborately simulated. Meanwhile, pushover analysis was used to reinstate a specimen of column test, which has the similar ratio of reinforcement to the typical bridge, and the hysteretic model parameters of the longitudinal steels inside columns were obtained. The damage indexes of column and hinge, which are primary components, under different limit states were acquired by moment-curvature analysis. Taking into account the uncertainty, nonlinear time-history analysis of the bridge was carried out through a suite of synthetic ground motions. Subsequently, a probabilistic seismic demand model was developed, and fragility curves were further focused on. According to fragility assessment, the conclusion shows that columns and hinge restrainers exhibit high fragility, and bridge system fragility is gradually determined by column fragility along with aggravating of the damage state. Unseating of girder can hardly occur at abutments and intermediate hinges. Moderate limit state could be exceeded in the positions of plug-type concrete structures in intermediate hinges, which tends to create transverse and vertical cracks, furthermore causing reinforcements yield. It indicates that it would severely underestimate the seismic fragility of intermediate hinges without considering the elaborate simulation of hinges.

Sign in / Sign up

Export Citation Format

Share Document