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

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 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.

The Experimental Study on Mechanical Performance of Multi-Span Column-Supported Assembly Box Concrete Hollow Floor

2013 ◽  
Vol 351-352 ◽  
pp. 560-565
Author(s):  
Kao Zhong Zhao ◽  
Guang Yi Wang
Keyword(s):  
Static Load ◽  
Mechanical Performance ◽  
Internal Force ◽  
Force Distribution ◽  
Support Section ◽  
Distribution Law ◽  
Specific Distribution ◽  
Floor Structure ◽  
External Forces

Assembly box concrete hollow floor sructure is a new-style whole structure that are constituted by the a cross section of a concrete box composed of small prefabricated components (concrete superposition box) and a cast-in-place concrete rib beam.The internal force distribution law was analyzed in this paper, based on the static load experiment with a multi span column-supported assembly box concrete hollow floor.The findings prove that the prefabricated boxs and cast-in-situ concrete ribbed beams are able to form a whole to jointly bear external forces, that the internal force distribution law is basically the same with the solid cast-in-situ concrete floor with no beams, and that the floor structure can be simplified to the column strip and middle strip.The specific distribution ratios between the minus moment and the plus moment of the column strip and middle strip respectively are as follows. For the angel area floor(contianed edge beams), the ratio of midspan section is 0.537:0.463, the ratio of support section is 0.816:0.184; for the edge area floor(contianed edge beams), the ratio of midspan section is 0.51:0.49, the ratio of support section is 0.808：0.192; for the inner area floor, the ratio of midspan section is 0.55:0.45, the ratio of support section is 0.75:0.25.

Internal Force Distribution Effect on Framework Stability

1983 ◽  
Vol 109 (1) ◽  
pp. 250-257 ◽  
Author(s):  
George D. Manolis ◽  
Dimitrios E. Beskos
Keyword(s):  
Internal Force ◽  
Force Distribution ◽  
Distribution Effect

Mechanical Behavior of Multi-Pylon Steel Cable-Stayed Bridge

2015 ◽  
Vol 1101 ◽  
pp. 355-360 ◽  
Author(s):  
Ming Gen Zeng ◽  
Chang Yuan Dai ◽  
Qing Tian Su
Keyword(s):  
Mechanical Behavior ◽  
Distribution Pattern ◽  
Internal Force ◽  
Force Distribution ◽  
Structure Form ◽  
Steel Cable ◽  
Steel Columns ◽  
Cable Stayed Bridge ◽  
Load Carrying ◽  
Main Girder

The structure form of the multi-pylon cable-stayed bridge is greatly different from that of conventional cable-stayed bridge with twin-pylon or single-pylon, which induces the mechanical behavior of multi-pylon cable-stayed bridge is also much different from that of cable-stayed bridge with twin-pylon or single-pylon. Combined with the Fanli Bridge in Yixing city of Jiangsu province, the load carrying performance of this type bridge is analyzed. The analytical results show that the internal force distribution pattern of main girder in this type cable-stayed bridge is different from that of in conventional cable-stayed bridge, also the internal force distribution pattern of both the different steel pylons in same bridge and the steel columns in same pylon are distinctive.

scholarly journals Back analysis of pile and anchor retaining structure based on BOTDA distributed optical fiber sensing technology

2021 ◽  
Vol 248 ◽  
pp. 01036
Author(s):  
Xin Wang ◽  
Xie Hui Luo ◽  
Wan xue Long ◽  
Bo Jiang
Keyword(s):  
Earth Pressure ◽  
Internal Force ◽  
Force Distribution ◽  
Foundation Pit ◽  
Retaining Structure ◽  
Fiber Sensing ◽  
Sensing Technology ◽  
Optical Fiber Sensing ◽  
Anchor Structure ◽  
Distributed Optical Fiber

In order to understand the deformation law and internal force distribution characteristics of the pile-anchor retaining structure in deep foundation pit engineering, the stress of the pile-anchor retaining system in the process of foundation pit excavation was tested by using the distributed optical fiber sensing technology of BOTDA. It uses the supporting pile cloth to set up the strain cable to collect the strain from the excavation process to the stability of the foundation pit, which analyzes the stress and internal force distribution. The results show that the overall deformation of the foundation pit is small and in a stable state. It uses the monitoring strain energy to truly reflect the distribution and transmission law of the pile internal force. It is shown that the bending moment is the maximum at the action position of the anchor cable on the pile anchor structure and 2.5m below the bottom of the pit. The design needs to reinforce the construction of such locations. At the same time, the distribution form of earth pressure calculated in reverse is different from the conventional one. When there are multiple rows of prestressed anchor cables, the earth pressure applied on the support is less than the calculated value of classical earth pressure theory. This pile anchor structure design theory and engineering application has reference value.

Analysis of Semi-Rigid Joint Frame with Moment-Rotation and Shearing-Deformation Relationships

2010 ◽  
Vol 163-167 ◽  
pp. 629-632
Author(s):  
Shu Jin Duan ◽  
Yan Qing Zhang
Keyword(s):  
Stiffness Matrix ◽  
Mathematic Model ◽  
Internal Force ◽  
Force Distribution ◽  
Deformation Characteristics ◽  
Nodal Force ◽  
Shearing Deformation ◽  
The Moment ◽  
Rigid Joints ◽  
Force Vectors

A mathematic model for semi-rigid joint frame is proposed, in which, both the moment-rotation and shearing-deformation characteristics of joint are taken into account. For element with simi-rigid joints, the stiffness matrix is derived, and some equivalent nodal force vectors are obtained when the element is subjected to different loads. The internal force distribution and the deformation in structure are greatly affected by the moment-rotation and shearing-deformation relationships of joints.

Study on the Reinforce Model of Loess Slope

2013 ◽  
Vol 353-356 ◽  
pp. 198-202
Author(s):  
Juan Juan Wang ◽  
Jun Tao Deng ◽  
Rui E. Li
Keyword(s):  
Internal Force ◽  
Force Distribution ◽  
Calculation Methods ◽  
Reinforced Slope ◽  
Force Condition ◽  
Advantages And Disadvantages ◽  
Loess Slope ◽  
The Common

A pre-stressed lattice frame is an effective structure of reinforced slope. The purpose of this paper is concerned chiefly with the study of the internal force distribution and calculation methods of the pre-stressed anchor lattice frames, and analyzed calculation methods advantages and disadvantages. It is concluded that the design and calculation of the lattice frames should consider the common deformation of the beam and the soil. It can make result especially approaching the force condition of the lattice frames.

Integrated Design System for Semi-Rigidly Connected Steel Frames

1997 ◽  
Vol 1 (1) ◽  
pp. 47-61 ◽  
Author(s):  
T Q Li ◽  
D A Nethercot ◽  
W M K Tizani
Keyword(s):  
Steel Frames ◽  
Integrated Design ◽  
Internal Force ◽  
Design System ◽  
Force Distribution ◽  
Alternative Analysis ◽  
Analysis Methods ◽  
Rigid Frame ◽  
Successful Design ◽  
The Cost

A prototype Integrated Design System (IDS) for semi-rigid steel frames is reported. The aim of this system is: (i) to assist designers in conducting the overall analysis required for the frames, (ii) to provide designers with a tool to design the frames economically in terms of the total cost of the frame. The system works by guiding the users towards appropriate design decisions that recognise the cost of the frames — not just material costs but also fabrication costs. Recognition of the semi-rigid and partial strength characteristics of beam-to-column connections means that the internal force distribution in a frame depends on the analysis method adopted. A successful design for a frame requires a balanced internal force distribution between the connections and the members. To assist in achieving this, a number of analysis methods have been incorporated into the system. A detailed economic appraisal of semi-rigid frame designs is presented by means of a worked example. This illustrates global comparisons between the use of alternative analysis methods as well as between alternative options in the detailing of the connections. The benefits that can be obtained from using the system at both the conceptual and the detailed design stages are demonstrated.

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