Spatial Effects and Broken-up Analysis for Bottom Plates of Box Girders in a Large Span Rigid Frame - Continuous Beam Bridge

2012 ◽  
Vol 178-181 ◽  
pp. 2268-2272
Author(s):  
Xin Dai Zuo ◽  
Zhao Le Qu ◽  
Bin Ge
Keyword(s):  
Finite Element ◽  
Cross Sections ◽  
Spatial Effects ◽  
Continuous Beam ◽  
Box Girders ◽  
Transverse Tensile ◽  
Continuous Beam Bridge ◽  
Rigid Frame ◽  
Radial Forces ◽  
Beam Bridge

The author took a rigid frame-continuous beam bridge for example, analyzed by means of plane finite element and space finite element methods. In the space model, corrugated pipes were built in order to consider the weaken effects to cross-sections. Aimed at the least well stage which is after prestressing and before grouting, spatial stresses were indicated. Final results indicate exceeded transverse tensile stresses caused by radial forces are the most important factor which led to bursting cracks.

Influence of Construction Procedures on the Liner and Stress of a PC Continuous Beam Bridge

2010 ◽  
Vol 121-122 ◽  
pp. 162-167
Author(s):  
Hu Cheng ◽  
Guo Xuan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Test Data ◽  
Significant Influence ◽  
Continuous Beam ◽  
Element Analysis ◽  
Continuous Beam Bridge ◽  
Cantilever Construction ◽  
Beam Bridge

During the construction of a bridge, the construction procedures may change from the originally designed procedures due to some reasons like the weather. In this paper, the influence of construction procedures on the liner and stress is investigated for a prestressed continuous beam bridge with three spans. Finite element analysis indicated that construction procedures have great impact on the liner control and they affect the middle span and side span differently. Although different sets of construction procedures cause different stress at corresponding construction stages after the cantilever construction is finished, they have no significant influence on the stress of the finally built bridge. Test data agreed with finite element analysis. It is thus the influence of construction procedures on bridge liner control should not be neglected.

Research on Prestressed Loss in Curving Hole of Prestressed Concrete Structure Caused by Frictional Resistance

2014 ◽  
Vol 587-589 ◽  
pp. 1668-1671 ◽  
Author(s):  
Chen Li ◽  
Kai Yin Zhang ◽  
Zhong Lin Fan
Keyword(s):  
Friction Coefficient ◽  
Prestressed Concrete ◽  
Frictional Resistance ◽  
Continuous Beam ◽  
Continuous Rigid Frame Bridge ◽  
Continuous Beam Bridge ◽  
Rigid Frame ◽  
Different Types ◽  
Beam Bridge ◽  
Rigid Frame Bridge

Excessive prestressed loss in prestressed concrete continuous beam bridge and continuous rigid frame bridge causes structures appearing different types of diseases. By theoretical analysis on computational expression of effective prestress in curving hole, and distribution of contact stress and experiment about prestressed loss caused by frictional resistance, this paper points out the disadvantages of current effective prestress formula in curving hole. According to the research on the major influencing factors of prestressed loss in curving hole-contact status and friction coefficient μ, it plays a remarkable role on the further analysis of prestressed loss in curving hole.

Analysis of Bridge Earthquake Damage and Reasonable Aseismic Systems

2012 ◽  
Vol 433-440 ◽  
pp. 4782-4787
Author(s):  
Xiu Shen Xia ◽  
Xing Chong Chen ◽  
Xiao Yang Li
Keyword(s):  
Seismic Damage ◽  
Earthquake Damage ◽  
Continuous Beam ◽  
Arch Bridge ◽  
Continuous Rigid Frame Bridge ◽  
Continuous Beam Bridge ◽  
Rigid Frame ◽  
Beam Bridge ◽  
Rigid Frame Bridge ◽  
Bridge System

Damage to simple beam bridge, continuous beam bridge, continuous rigid frame bridge and arch bridge is analyzed in Wenchuan, Tangshan and Yunnan earthquakes etc. The results show that seismic damage for the same bridge system has many common features, and seismic performance of different bridge system varies greatly. Fall, bearing sliding, beam displacement and collision between adjacent beams at expansion joints the is major earthquake damage for simply beam bridge. Seismic damage ratio and degree of continuous beam bridge is bigger than the simple support beam bridge. Earthquake damage of the continuous rigid frame bridge is obvious lightly in the close simple beam and continuous beam bridge. Seismic damage of arch bridge is more complex. Selection methods of reasonable aseismic system for the straight line bridge in seismic zone are proposed based on the analysis of earthquake damage and numerical analysis.

Application of SCGM(1,1) Method in the Construction Monitoring and Control of Continuous Girder Bridges

2012 ◽  
Vol 178-181 ◽  
pp. 2113-2116
Author(s):  
Bao Fu Duan ◽  
Cheng Bo Zhai ◽  
Xian He Weng
Keyword(s):  
Cross Sections ◽  
Construction Control ◽  
Continuous Beam ◽  
Grey Prediction ◽  
Monitoring And Control ◽  
Girder Bridges ◽  
Continuous Beam Bridge ◽  
Control Section ◽  
Beam Bridge ◽  
And Control

This paper bases on building grey prediction model with the stress sequence of continuous beam bridge construction control section, discusses the application of the model in the construction control of the continuous beam bridge. SCGM (1, 1) dynamic model is based on test results of control cross-sections of Nanhe Bridge have been established for prediction, on the background of the construction of Nanhe Bridge, in Jiangsu province. The example shows that the prediction precision and adaptability of the model can achieve the requirements of the engineering construction, and the feasibility and adaptability of the construction control for bridge by using this model is validated to forecast the stress value in the practical construction control for a PC continuous bridge.

scholarly journals Validation of the load-bearing capacity of the frame assembly of metal structures on the standard 2.440 series using IDEA StatiCa

2020 ◽  
Vol 10 (3) ◽  
pp. 406-419
Author(s):  
Denis A. Melnikov ◽  
◽  
Tatyana L. Dmitrieva ◽  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Cross Sections ◽  
Limit State ◽  
Local Buckling ◽  
High Strength ◽  
Software Systems ◽  
Rigid Frame ◽  
Welding Forces ◽  
Element Method

The paper aims to study the actual operation of a rigid frame unit for coupling a crossbar with a column on high-strength bolts according to the standard 2.440-2 series using modern software systems of the component finite element method. Special attention was paid to the operation of nodal elements, as well as their stress-strain state. Based on the results of static calculations, the cross-sections of the elements under consideration, as well as the components of the node (plates, bolts, seams, etc.) were selected from the tables of the standard series. Subsequently, using the component finite element method serving as the basis of the IDEA StatiСa software, all the components of the node were mod-elled with respect to acting forces. The conducted calculations confirmed the suitability of the obtained node model for identifying inconsistencies in the series and modern standards. Using stresses on plates, bolt and welding forces, as well as several forms of vibration to assess the stability of compo-nents, the applicability of the node in question in the proposed configuration was evaluated. It turned out that the node failed to meet modern standards in terms of design conditions. Moreover, the serial bolts were overloaded by almost 38%, and some welds approached the limit state. When used in real conditions, this can lead to serious losses, including human lives. Recommendations are given for changing the specific configuration of the node in order to protect it from the destruction of any nature, including local buckling failure.

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