Nonlinear FEM and Control Method for Super-Long Span Three Main Trusses and Three Cable Planes Railway Cable-Stayed Bridge

2011 ◽  
Vol 255-260 ◽  
pp. 1065-1069
Author(s):  
Zhi Shuo Yang ◽  
Mei Xin Ye ◽  
Yan Qun Zhou ◽  
Li Ou
Keyword(s):  
Control Method ◽  
Geometrical Nonlinearity ◽  
Secondary Development ◽  
Fe Model ◽  
Changjiang River ◽  
Nonlinear Fem ◽  
Finite Element Program ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Element Program

The Anqing Changjiang River Railway Bridge is an important fixed link across the Changjiang River in Anqing both the Nanjing-Anqing Intercity Railway and Fuyang-Jingdezhen Railway. Its main bridge is a six-span continuous steel truss girder cable-stayed bridge with main span of 580 m. The purpose of this paper is to describe some of its main features and FE model for geometrical nonlinearity using the finite element program ANSYS as well as control method of stress-free status for erection of cable-stayed bridge. Based on geometrical nonlinear analysis theories, secondary development of ANSYS using APDL was accomplished.

Analysis of Pylon Anchorage Zone of Cable-Stayed Bridge

2014 ◽  
Vol 501-504 ◽  
pp. 1125-1128
Author(s):  
Liang Liang Zhai
Keyword(s):  
Type Structure ◽  
Construction Technology ◽  
Analysis Method ◽  
Finite Element Program ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Element Program ◽  
Force Characteristics ◽  
Major General ◽  
Cable Stayed Bridges

For long-span cable-stayed bridge, the stress of pylon anchorage zone is complex. For the construction technology personnel, the research on the force characteristics of anchorage zone can offer a theoretical base to organize construction better. This paper makes a further study for the stress of tower anchorage zone of two cable-stayed bridges with different anchor forms by using major general finite element program ANSYS to analysis the force characteristics of anchorage zone in detail. The results provide a reference for construct and design the same type structure. The analysis method for same type structure is also worth learning.

scholarly journals The impact of drilling and slitting construction on damage field: evolution characteristics in low-permeability coal seam

2021 ◽  
Vol 37 ◽  
pp. 205-215
Author(s):  
Heng Chen ◽  
Hongmei Cheng ◽  
Aibin Xu ◽  
Yi Xue ◽  
Weihong Peng
Keyword(s):  
Finite Element ◽  
Rock Mass ◽  
Damage Mechanics ◽  
Effective Strain ◽  
Secondary Development ◽  
Distribution Area ◽  
Finite Element Program ◽  
Element Program ◽  
Mining Face ◽  
The Impact

ABSTRACT The fracture field of coal and rock mass is the main channel for gas migration and accumulation. Exploring the evolution law of fracture field of coal and rock mass under the condition of drilling and slitting construction has important theoretical significance for guiding efficient gas drainage. The generation and evolution process of coal and rock fissures is also the development and accumulation process of its damage. Therefore, based on damage mechanics and finite element theory, the mathematical model is established. The damage variable of coal mass is defined by effective strain, the elastoplastic damage constitutive equation is established and the secondary development of finite element program is completed by FORTRAN language. Using this program, the numerical simulation of drilling and slitting construction of the 15-14120 mining face of Pingdingshan No. 8 Mine is carried out, and the effects of different single borehole diameters, different kerf widths and different kerf heights on the distribution area of surrounding coal fracture field and the degree of damage are studied quantitatively. These provide a theoretical basis for the reasonable determination of the slitting and drilling arrangement parameters at the engineering site.

Research of Longitudinal Seismic Response of Self-Anchored Cable-Stayed Suspension Bridge under Pile-Soil-Structure Interaction

2011 ◽  
Vol 255-260 ◽  
pp. 1167-1170
Author(s):  
Feng Miao ◽  
Wang Bo ◽  
Guan Ping
Keyword(s):  
Seismic Response ◽  
Soil Structure ◽  
Suspension Bridge ◽  
Soil Structure Interaction ◽  
Response Analysis ◽  
Fe Model ◽  
Longitudinal Displacement ◽  
Finite Element Program ◽  
Structure Interaction ◽  
Element Program

Based on scheme of Dalian gulf cross-sea bridge, in this paper, a 3-dimensional FE model for Self-anchored cable-stayed suspension bridge is established with finite element program and pile-soil-structure interaction is simulated by use of the equivalent embed fixation model. Based on the FE model, model analysis is carried out and the effects of pile-soil-structure interaction on dynamic behavior of long-span self-anchored cable-stayed suspension bridge are specially studied. The seismic response analysis result considering that pile-soil-structure interaction was compared with that of without considering such interaction. The analysis result show that interaction extend the nature period of structure, has the greatest impact to the first vibration mode; meanwhile, enlarged longitudinal displacement and moment of stiffening beam in middle of main span, longitudinal displacement on top of tower and axial force at bottom, but reduced the moment of tower at bottom. The research results provide some theoretical foundation to composite structure system.

Study on Construction of Long Span and Soft Rock Tunnel with Numerical Simulation

2013 ◽  
Vol 438-439 ◽  
pp. 964-967
Author(s):  
Bin Zhu ◽  
Xiao Jing Shi
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Soft Rock ◽  
Tunnel Excavation ◽  
Finite Element Program ◽  
Factors Affecting ◽  
Long Span ◽  
Element Program ◽  
Main Factors ◽  
Rock Tunnel

With characteristics of the long span and soft rock tunnel, this paper analyzes the main factors affecting tunnel stable on the basis of the way of tunnel excavation method. The large finite element program is used in research of a tunnel, with a numerical simulation of two different way, top heading and bench method and double side drift method. From the result of stress field and displacement field of the tunnel , some useful conclusion are obtained, that double side drift method is appropriate for this kind of soft rock tunnel.

Dynamics Analysis of Steel-Concrete Composite Box Beams

2014 ◽  
Vol 528 ◽  
pp. 94-100
Author(s):  
Li Zhong Jiang ◽  
Xin Kang ◽  
Chang Qing Li
Keyword(s):  
Dynamic Performance ◽  
Composite Beams ◽  
Design Stage ◽  
Finite Element Program ◽  
Long Span ◽  
Box Beam ◽  
Long Span Bridge ◽  
Element Program ◽  
Box Beams ◽  
Composite Box Beam

Steel-concrete composite box beams have been widely used in high rise buildings and long-span bridge structures. But so far, almost all researches have been aimed at the static behavior of the composite beams and dynamic behavior of steel and concrete composite beams have been rarely studied. In this paper, by using general finite element program ANSYS to analyze the dynamic performance of the composite box beam under different geometric parameters. Research is focused on the slip stiffness、width-to-thickness ratio、depth-span ratio and the height ratio of cross section to the vibration characteristics of composite box beam. The results indicate that these factors affect the seismic dynamic response of steel-concrete composite box beams most and they should be controlled according to different situations in seismic design stage.

Horizontal Seismic Response of Self-Anchored Cable-Stayed Suspension Bridge under Pile-Soil-Structure Interaction

2011 ◽  
Vol 63-64 ◽  
pp. 421-424
Author(s):  
Miao Feng ◽  
Guan Ping ◽  
Wang Bo
Keyword(s):  
Seismic Response ◽  
Soil Structure ◽  
Suspension Bridge ◽  
Horizontal Displacement ◽  
Soil Structure Interaction ◽  
Response Analysis ◽  
Fe Model ◽  
Finite Element Program ◽  
Structure Interaction ◽  
Element Program

Based on scheme of Dalian gulf cross-sea bridge, in this paper, a 3-dimensional FE model for Self-anchored cable-stayed suspension bridge is established with finite element program and pile-soil-structure interaction is simulated by use of the equivalent embed fixation model. Based on the FE model, model analysis is carried out and the effects of pile-soil-structure interaction on dynamic behavior of long-span self-anchored cable-stayed suspension bridge are specially studied. The seismic response analysis result considering that pile-soil-structure interaction was compared with that of without considering such interaction. The analysis result show that interaction reduced horizontal displacement in middle span of stiffening beam and top of tower, horizontal moment not only at bottom of tower, but also assistant piers. The research results provide some theoretical foundation to composite structure system.

Vertical Seismic Response of Self-Anchored Cable-Stayed Suspension Bridge under Pile-Soil-Structure Interaction

2011 ◽  
Vol 243-249 ◽  
pp. 1798-1802
Author(s):  
Feng Miao ◽  
Guan Ping ◽  
Wang Bo
Keyword(s):  
Seismic Response ◽  
Soil Structure ◽  
Suspension Bridge ◽  
Soil Structure Interaction ◽  
Response Analysis ◽  
Fe Model ◽  
Finite Element Program ◽  
Vertical Excitation ◽  
Structure Interaction ◽  
Element Program

Based on scheme of Dalian gulf cross-sea bridge, in this paper, a 3-dimensional FE model for Self-anchored cable-stayed suspension bridge is established with finite element program and pile-soil-structure interaction is simulated by use of the equivalent embed fixation model. Based on the FE model, model analysis is carried out and the effects of pile-soil-structure interaction on dynamic behavior of long-span self-anchored cable-stayed suspension bridge are specially studied. Under vertical excitation, the seismic response analysis result considering that pile-soil-structure interaction was compared with that of without considering such interaction. The analysis result show that interaction reduced longitudinal displacement of stiffening beam in middle of main span and tower at bottom, moment at bottom of tower and auxiliary pier pile, but enlarged the moment of conjoining section between steel and steel beam. The research results provide some theoretical foundation to composite structure system.

Elasto-Plastic Analysis of Frame Structures under Large Displacement-Rotation Deformations

2011 ◽  
Vol 243-249 ◽  
pp. 5968-5974
Author(s):  
Dong Quan Yang ◽  
Hong Peng
Keyword(s):  
Finite Element ◽  
Stiffness Matrix ◽  
Control Method ◽  
Large Displacement ◽  
Frame Structures ◽  
Finite Element Program ◽  
Numerical Experimentation ◽  
Plastic Analysis ◽  
Element Program ◽  
Displacement Control Method

A finite element program for elasto-plastic analysis of 3D beams and frame structures under large displacement/rotations is developed. The element is Timoshenko beam element based on mechanics of continuum. Constitutive equations for large displacements/rotations in elastic stage are expressed in an explicit way which is suitable for programming. The modification of constitutive equation is presented for the analysis of elasto-plastic problems. A fiber model is adopted for the calculation of stiffness matrix and internal forces. For solution of nonlinear finite element equations, general displacement control method and semi-modified stiffness matrix method is adopted. The results of numerical experimentation show that the program work well for 3D beams and frame structures under elasto-plastic large displacement/rotations.

Analysis of Ultimate Load-Bearing Capacity of Long-Span CFST Arch Bridges

2011 ◽  
Vol 90-93 ◽  
pp. 1149-1156 ◽  
Author(s):  
Yang Liu ◽  
Da Wang ◽  
Yi Zhou Zhu
Keyword(s):  
Bearing Capacity ◽  
Failure Modes ◽  
Ultimate Load ◽  
Elastic Buckling ◽  
Load Bearing Capacity ◽  
Finite Element Program ◽  
Load Bearing ◽  
Linear Elastic ◽  
Long Span ◽  
Element Program

In order to study the ultimate load-bearing capacity of the long-span concrete-filled steel tubular (CFST) arch bridge with fly-bird-type, the ANSYS finite element program was used to establish its special model, and to study ultimate load-bearing capacity of this bridge with three different methods. The constitutive relation factors of concrete-filled steel tubular was taken into consideration including confining effect ultimate load coefficients, failure modes, and load-displacement curves of this bridge under different cases. The result indicate that the ultimate load-bearing capacity of the bridge can meet the requirement, all of its failure modes is out-plane, the two methods, linear elastic buckling analysis and only geometric nonlinearity analysis, will over high estimate ultimate load-bearing capacity of this bridge, and linear elastic buckling method cannot reflect real failure mode of this structure. In order to correctly estimate the ultimate load-bearing capacity of the bridge structure, the effect of geometric and material double nonlinearity couldn’t be neglected.

Analysis of Sliding Cable Element

2012 ◽  
Vol 166-169 ◽  
pp. 3060-3064
Author(s):  
Xiang Rong Fu ◽  
Cheng Luo ◽  
Jin San Ju ◽  
Xiu Gen Jiang ◽  
Ge Tian
Keyword(s):  
Finite Element ◽  
Transmission Lines ◽  
Electrical Transmission ◽  
Element Analysis ◽  
Finite Element Program ◽  
Long Span Bridges ◽  
Long Span ◽  
Element Program ◽  
Nonlinear Transient ◽  
Cable Systems

The sliding cable structures have found its application in many practical structures, such as ski lifts, electrical transmission lines, and cable systems in the erection procedures of long-span bridges. This paper presents a method for modeling the cable sliding on a pulley or sheaves. “Sliding cable element” is developed to solve the general problem. Based on the foundational principles of finite element analysis, the relation of the forces in the element on equilibrium state is used. The computation is simplified by automatically adjusting the cable length on each side of a pulley or sheave in order to maintain equilibrium. The element models are implemented in a geometrically nonlinear, transient implicit finite element program. Several numerical examples are developed to validate the effective of the sliding cable element.

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