Loading Analysis and Mathematical Calculation for Arc Axis of the Exponential Function

2013 ◽  
Vol 834-836 ◽  
pp. 1382-1385
Author(s):  
Li Xiang ◽  
Zhu Feng ◽  
Zhai Qiu ◽  
Ruo Yin Zhang
Keyword(s):  
Exponential Function ◽  
Internal Force ◽  
Force Distribution ◽  
Shipping Industry ◽  
Uniform Load ◽  
Concentrated Load ◽  
Long Span ◽  
Mathematical Calculation ◽  
Dangerous Section ◽  
Loading Analysis

The concept of arch longitudinal beam wharf was brought out in the contemporary shipping industry of China as a result of the conflict between traditional high-piled wharfs and the increasing size of freights. Different alignments of arch axis will lead to different internal force distributions and the most dangerous section. A series of equations for the arch axis are derived through the transformation of the exponential function under a 40-meter-long span. Based on the analysis of equations affected by the combined force of uniform load and concentrated load, it is providing reference for engineers and analysts with the internal force distribution under some commonly used axis and the location of the most dangerous section for the archs.

scholarly journals Mobility evaluation of wheeled robots on soft terrain: Effect of internal force distribution

2016 ◽  
Vol 100 ◽  
pp. 259-282 ◽  
Author(s):  
Bahareh Ghotbi ◽  
Francisco González ◽  
József Kövecses ◽  
Jorge Angeles
Keyword(s):  
Internal Force ◽  
Force Distribution ◽  
Wheeled Robots ◽  
Terrain Effect

Seismic Performance Assessment of Long Span Continuous Rigid Bridge

2013 ◽  
Vol 353-356 ◽  
pp. 2033-2038
Author(s):  
Qi Wen Jin ◽  
Tong Ning Wang ◽  
Yi Li Sun ◽  
Zhao Tong Hu
Keyword(s):  
Pile Foundation ◽  
Plastic Hinge ◽  
Bending Moment ◽  
Internal Force ◽  
Seismic Capacity ◽  
Seismic Performance Assessment ◽  
Soil Function ◽  
Long Span ◽  
Rigid Frame ◽  
Cantilever Construction

Based on the theory of cantilever construction, combined with a three cross continuous rigid frame bridge, choosing the biggest cantilever stage, side span cross fold stages, middle span cross fold stage and complete bridge stage as the research object. Considering the pillar-soil function, making the seismic elastic-plastic response calculation. Getting the result that, during the earthquake, pillar-soil function can improve the flexible extension ability of the bridge structure so as to get better resistance seismic capacity. Internal force of the construction stage gradually reduces along the bottom pier, the middle pier and the top pier. Along the bridge, the maximum bending moment appears at the biggest cantilever stage. Horizontal to the bridge, the maximum bending moment appears at the side span cross fold stages. Plastic areas develops quickly during pier bottom and pile top, the crack is obvious; Plastic hinge first appears in the pile foundation, consuming earthquake energy through its plastic deformation so as to reduce the earthquake impact of pier. We should try to avoid plasticitys appearing in the pile foundation during the design, which will provide convenience for the follow-up maintenance.

Vertical and Horizontal Seismic Response Analyses of Long-Span and Single-Layer Spherical Lattice Shell Structure

2014 ◽  
Vol 602-605 ◽  
pp. 602-605
Author(s):  
Jin Sheng He ◽  
She Liang Wang
Keyword(s):  
Vibration Control ◽  
Shell Structure ◽  
Response Spectrum ◽  
Single Layer ◽  
Internal Force ◽  
Seismic Load ◽  
Seismic Responses ◽  
Long Span ◽  
Current Design ◽  
Lattice Shell

The dynamic characteristics of 80 m single-layer spherical lattice shell structure are analyzed to control its vibration under seismic load. Through the response spectrum curve of current design specification, the analyses for the vertical and horizontal seismic responses of the single-layer spherical lattice shell structure are made by CQC, and the displacement response of the nodes and internal force of the rods unit are calculated respectively. The calculation results show that the vertical and horizontal seismic responses of the long-span lattice shell structure are in great difference, and should be performed in vibration control at the same time, which could provide certain references for the seismic design and vibration control of single-layer spherical lattice shell structure.

Behaviour Analysis of Prestressed Concrete Deck-Tied Arch Bridge

2013 ◽  
Vol 671-674 ◽  
pp. 952-956 ◽  
Author(s):  
Yi Qiang Xiang ◽  
Li Chang Zhang ◽  
Qiang Qiang Wu
Keyword(s):  
Prestressed Concrete ◽  
Internal Force ◽  
Analysis Model ◽  
Box Girder ◽  
Arch Bridge ◽  
Long Span ◽  
Prestressing Force ◽  
Horizontal Thrust ◽  
Tied Arch Bridge ◽  
Concrete Deck

The prestressed concrete deck-tied arch bridge doesn’t only have a long span, good appearance and economy, but also have the characteristics of low requirements to the foundation. It changes traditional tied arch bridge into deck-tied arch bridge, which looks like sunflower-shaped arch and prestressed steel strands are embedded in box girder on the top of the arch. Taking Yingbin Bridge as engineering background, the reasonable analysis model was established and behaviour of the bridge under design load was analyzed. The results shown that the design project is reasonable, prestressing force embedded in box girder can balance horizontal thrust in arch bridge effectively, improving the internal force of the main arch ring.

scholarly journals Fastener Scaffold Stability Analysis and Experimental Research Under Non-Uniform Distributed Load

2017 ◽  
Vol 11 (1) ◽  
pp. 873-886
Author(s):  
Dong Chen ◽  
Yuzhuo Wang ◽  
Xiping He
Keyword(s):  
Load Distribution ◽  
Stability Limit ◽  
Limit Load ◽  
Internal Force ◽  
Force Distribution ◽  
Numerical Studies ◽  
Distributed Load ◽  
Transfer Rules ◽  
Geometry Nonlinearity ◽  
Vertical Bars

Introduction: An experiment was carried out on the basis of material nonlinearity, geometry nonlinearity and semi rigid fasteners for the internal force distribution and transfer rules of the scaffold. Methods: This paper presents results from a set of numerical studies on the influence of the random imperfection method, the interaction of various imperfections and the most disadvantageous stability limit load. Result and Conclusion: Data from numerical studies indicate that stress at the top of the vertical bar was larger within the scope of load; and the horizontal bar and brace participated in the work of the scaffold. The internal force that came through the two types of bars enabled us to realize the redistribution in every vertical bar in order to decrease the stress from the top to the bottom of the vertical bars and involve them in the work of the scaffold. Data from numerical studies also indicates that these imperfections all interact with each other and the load distribution also influences the scaffold’s stability.

scholarly journals Influence of Strong Spatially Varying Near Fault Ground Motion on Steel Box Arch Bridge

2021 ◽  
Author(s):  
Zhen Liu ◽  
Shibo Zhang
Keyword(s):  
Ground Motion ◽  
Internal Force ◽  
Shaking Table ◽  
Element Analysis ◽  
Arch Bridge ◽  
Near Fault ◽  
Long Span ◽  
Spatial Propagation ◽  
Near Fault Ground Motion ◽  
Spatially Varying

Abstract In violent earthquakes, ground motion is considered to change dramatically in the process of spatial propagation. Strong spatially varying exists in ground motion near fault area, and it can cause the large-span and large stiffness structure to be damaged. In this paper, a typical long-span steel box arch bridge is selected as an engineering case. In order to simulate the spatially varying of near fault ground motion accurately, the records that sampled in former earthquake are used as ground motion input. The shaking table experiment and finite element analysis are used as analysis means. Through the analysis of the internal force and displacement response of the key position of the arch rib, it is found that the spatially varying in the near fault ground motion can bring severe seismic response .If the spatially varying is ignored, the damage of the bridge will be seriously underestimated.

Stress Distribution in a Reentrant Corner

1933 ◽  
Vol 1 (2) ◽  
pp. 31-37
Author(s):  
J. H. A. Brahtz
Keyword(s):  
Stress Distribution ◽  
Force Distribution ◽  
Concentrated Load ◽  
Reentrant Corner ◽  
Von Karman ◽  
Plain Strain ◽  
Von Kármán

Abstract This paper deals with the stress distribution under plain strain in a corner of any angular magnitude, i.e., a plane with an angular incision or notch. It begins with a brief statement of the method employed by Dr. Th. von Karman in his exact treatment of a beam in bending (Aachen Abhandlungen, Heft 7, 1927). A generalization of this method is outlined which is applicable to the corner for any force distribution over the straight boundaries, and the solution is found for a concentrated load at any point of the boundary. The stresses are determined and shown to be infinite at the vertex of the corner. The discussion points out the very interesting paradox that stresses may be finite for certain continuous loadings, but become infinite if a portion of the load is removed.

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