Engineering Design and Analysis for Four-Legged Steel Trellis Column

2010 ◽  
Vol 44-47 ◽  
pp. 1500-1504
Author(s):  
Jian Bin Chen ◽  
Hai Jun Xue
Keyword(s):  
Engineering Design ◽  
Design Process ◽  
Design Method ◽  
Bending Moment ◽  
Internal Force ◽  
Axial Pressure ◽  
Length Width ◽  
The Stability ◽  
Force Calculation

In this paper, the design process of the four-legged steel trellis column is introduced for an actual project. The internal force calculation including of axial pressure and bidirectional bending moment are discussed. The strength and stability satisfy the requisition by code. Confirm that the stability of sub pillar is key element for design of trellis column. The simulations show that the design method is safety and reasonable by STAAD.pro software. Different gridding is chosen based on length, width and thickness of members; excess larger or smaller gridding is improper. The conclusions and methods can be referred by later engineering.

scholarly journals Effects of Multidisciplinary Participatory Design Method on Students’ Engineering Design Process

Eng ◽  
2020 ◽  
Vol 1 (2) ◽  
pp. 112-121
Author(s):  
Yu-Hung Chien ◽  
Chun-Kai Yao ◽  
Yu-Han Chao
Keyword(s):  
Engineering Design ◽  
Design Process ◽  
Participatory Design ◽  
Sequential Analysis ◽  
Design Method ◽  
Control Group ◽  
Teaching Model ◽  
Engineering Design Process ◽  
Design Activities ◽  
Experimental Group

This study took the ergonomics design course as an example to propose a design teaching model of multidisciplinary participatory design (MPD), and investigated the effects of this teaching model on the engineering design behavior of college students. We used lag behavior sequential analysis to compare the design behaviors of three student groups: a participatory design (PD) experimental group, an MPD experimental group, and a control group. The results of the study show that (1) students in the PD experimental group had 13 significant sequential engineering design behaviors, students in the MPD experimental group had 10, and students in the control group had only seven. The engineering design behaviors of the experimental groups were more diversified than those of the control group. (2) The three groups of students had a small number of significant design behavior transfers in the engineering design process, indicating that the students’ sequential design behaviors between two different design activities were insufficient. We concluded by detailing the pros and cons of using the MPD teaching model based on the results of this study, and hopefully by providing a reference for teaching engineering design.

Analysis of Internal Force and Deformation for Pit Retaining Structure by Considering the Interaction of Pile Stiffness

2013 ◽  
Vol 838-841 ◽  
pp. 397-401
Author(s):  
Ming Li ◽  
Ren Wang Liang
Keyword(s):  
Finite Difference ◽  
Engineering Design ◽  
Axial Force ◽  
Influence Factors ◽  
Bending Moment ◽  
Internal Force ◽  
Equivalent Stiffness ◽  
Deep Excavation ◽  
Retaining Structure ◽  
Design Software

In this paper, taking one deep excavation engineering as an example, modeling by the FLAC3D finite difference software, combining with the Lizheng deep excavation supporting design software, taking the equivalent stiffness of combination pile as 2.300-4.789(10-2m3), and analyzing the pile body bending moment, anchor axial force and pit deformation by considering interaction of pile stiffness. In addition, in this paper the influence factors of pile stiffness has been discussed, and provides a reference for the engineering design.

Inner Force Analysis of Two Typical Frames with Vertical Displacement

2008 ◽  
Vol 400-402 ◽  
pp. 341-346
Author(s):  
Wei Zhou
Keyword(s):  
External Load ◽  
Bending Moment ◽  
Simple Calculation ◽  
Basic Structure ◽  
Vertical Displacement ◽  
Internal Force ◽  
Moment Redistribution ◽  
Calculation Results ◽  
Vertical Chain ◽  
Force Calculation

Finite element method is often used to obtain exact solution in the course of internal force calculation of some complex frames which contain nodal vertical displacement such as frames with transferring layer and mega-frames with sub-structure. In the phase of scheme comparison and schematic design, methods which can quickly produce calculation results of the above said frameworks are necessary. Based on the basic principle of displacement method, this paper proposes a simple analytical method for frameworks that contain nodal vertical displacement. According to the proposal, the basic structure for calculation is the framework in which is added vertical chain-pole at relevant node; the basic unknown quantities are the nodal vertical displacement of the basic structure; the basic equation is fixed according to the equilibrium of node forces; unit vertical displacement as well as bending moment and shear diagram of the basic structure under external load are respectively obtained by using moment redistribution method; nodal vertical displacement is determined through substitution of shear force of relevant rod into the equilibrium equation of the chain-pole node; the actual internal force is determined through superposition of actual vertical displacement and internal force diagram algebra of the basic structure under vertical external load. An engineering example is introduced, which is intended to provide reference for the simple calculation for the above said complex frameworks.

Analysis of Large-Span Steel Concrete Railway Arch Bridge Suspender Tension

2013 ◽  
Vol 361-363 ◽  
pp. 1259-1263 ◽  
Author(s):  
Jia Lin Xu
Keyword(s):  
Bending Moment ◽  
Internal Force ◽  
Steel Tube ◽  
Force Balance ◽  
Initial Tension ◽  
Finite Element Program ◽  
Arch Bridge ◽  
Reverse Sequence ◽  
Element Program ◽  
Force Calculation

In this paper the concrete-filled steel tube concrete arch bridge as the research object, through the finite element program MIDAS, analyzes the internal force of the whole bridge, determined the distribution of internal force and the most unfavorable position; Using the force balance method, taking the reasonable stress of the bending moment status to control goals, determines the boom of the bridge as the condition of reasonable internal force; Use fall down method, according to the reverse sequence in order to cut the boom, each cut as a model for internal force calculation and analysis, get the next will be cut derrick's internal force, its value is the order construction boom of the initial tension.

The Mechanics Analysis and Feedback Design for Shallow Multi-arch Tunnel under Unsymmetrical Pressure

2011 ◽  
Vol 261-263 ◽  
pp. 1114-1118 ◽  
Author(s):  
Hong Ke Pan ◽  
Yu Guo Zhang ◽  
Jiang Chun Hu ◽  
Lin De Yang
Keyword(s):  
Partial Pressure ◽  
Mechanical Behavior ◽  
Design Method ◽  
Back Analysis ◽  
Internal Force ◽  
Forward Analysis ◽  
Feedback Design ◽  
Mechanics Analysis ◽  
Lining Structure ◽  
Force Calculation

Shallow multi-arch tunnel under unsymmetrical pressure has complex mechanical behavior to which further study is lacking at present. The existing design methods are thoughtless about the features of shallow and partial pressure. The phenomena of cracks, collapse or other diseases in tunnel lining structure are often seen during the construction or after the completion. Combining one tunnel example, this paper presented scientific feedback design method that suited for Shallow multi-arch tunnel under unsymmetrical pressure: made load back analysis with collected information during construction, then averaged the above load and field monitoring load to make forward analysis and internal force calculation, which was used as reference of reinforcement and sectional design for lining structure.

Study of Safety Influence Factor of Bridge Substructure in Loess Gulch

2012 ◽  
Vol 546-547 ◽  
pp. 89-96
Author(s):  
Jin Wei ◽  
Zhong Ju Feng ◽  
Feng Ma
Keyword(s):  
Soil Erosion ◽  
Debris Flow ◽  
Pile Foundation ◽  
Influence Factor ◽  
Lateral Displacement ◽  
Bending Moment ◽  
Zero Point ◽  
Internal Force ◽  
Prevention Measures ◽  
The Stability

In this paper, the geology characteristics of loess gulch area were summarized. The mechanical models of the influence of landslide, debris flow and soil erosion on the safety of the pile foundation were created. The influence of the geology casualty on the safety of the pile foundation were analyzed. The analyses showed, when the pile foundation located the varied position of the loess gulch, the influence of soil erosion on the pile foundation character (acting force of pile side, free length of the pile, the first zero point position of the flexure curve, drawdown of the maximum bending moment, the increment of the lateral displacement, the drawdown of the lateral bearing capacity, the drawdown of the stability, etc.) were strikingly different. The calculation method of the pile and pier internal force was put forward under the function of landslide thrust and pressing force of debris flow. The corresponding prevention measures to different influencing factors were presented in the end.

Internal Force Calculation of Two-Way Curved Arch Bridge

2012 ◽  
Vol 594-597 ◽  
pp. 1561-1564
Author(s):  
Bao Rong Huo ◽  
Guang Ning Yang ◽  
Xiang Dong Zhang
Keyword(s):  
Bending Moment ◽  
Internal Force ◽  
Arch Bridge ◽  
Traffic Capacity ◽  
Moment Distribution ◽  
Bridge Structures ◽  
Calculation Results ◽  
Load Simulation ◽  
Force Calculation ◽  
Main Arch

Because of two-way curved arch bridge with low design load, less structural steel, improper construction, overloading and poor integrity, when the bridge structure can’t satisfy the carrying capacity and traffic capacity requirements, we urgently need reinforce the bridge, which has become an important link of safety assessment and insurance of the bridge structures. Internal force calculation of two-way curved arch bridge is done, and calculation conclusions of Aohan Bridge are shown. Plane rod unit’s calculation results show that the bridge under the action of steam-20, hang-100 loads, eccentricity of the section at the arch feet in main arch ring beyond allowable eccentricity, a state of large eccentric's stress appears, and on surface of the arch feet appeared tensile crack in the load simulation. The calculation results of the main arch ring shows that a phenomenon of stress concentration exists in the arch feet, in addition to the influence of big eccentric. Technology processing should be considered when do the arch feet reinforcement. Data from the arch ring calculation results, the bridge has certain overload potential. But according to the bending moment distribution, strengthen the resistance bending moment in the arch feet, an allow full play to the potential of concrete iron in the arch rib under the premise of reinforced the positive bending moment.

Analysis of Dynamic Characteristics of Pile-Soil Coupling Effect in Consideration of Large Span Cable-Stayed Bridge

2014 ◽  
Vol 501-504 ◽  
pp. 1270-1273
Author(s):  
Wen Yuan Chen
Keyword(s):  
Axial Force ◽  
Soil Structure ◽  
Coupling Effect ◽  
Reaction Force ◽  
Bending Moment ◽  
Internal Force ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Pile Cap ◽  
Force Calculation

Using the viscouselastic artificial boundary, three conditions of long-span cable-stayed bridge are analyzed,such as pile cap consolidation, pile - structure and pile soil structure interaction. Natural frequency of bridge of pile - soil - structure coupling becomes small and cycle becomes long. The pile bottom reaction force decreased obviously, at the same time, the axial force , bending moment, axial force of cable, tower of axial force and bending moment is also reduced significantly. Cable-stayed bridge is a special flexible structure, so, static internal force calculation in the tower bottom consolidation pattern is safe, but the value is too large.

Internal Force Analyzing of Plane Frame Structure Based on Interaction Theory

2011 ◽  
Vol 250-253 ◽  
pp. 1691-1695
Author(s):  
Xiang Chen ◽  
Wei Hou
Keyword(s):  
Engineering Design ◽  
Design Method ◽  
Internal Force ◽  
Frame Structure ◽  
Computation Method ◽  
Interaction Theory ◽  
Engineering Construction ◽  
Interaction System ◽  
Plane Frame ◽  
Mechanism Of Interaction

Based on researchers of interaction theory and its application, mechanism of interaction among superstructure, base and foundation was analyzed and a design method was proposed. Combining with engineering construction cases, change law of internal force of superstructure in interaction system was researched through comparing results between interaction analyzing method and custom computation method. Some meaningful engineering design devices were concluded finally.

Experimental and Numerical Analysis of Concrete Slender Columns by Stability Failure

2016 ◽  
Vol 821 ◽  
pp. 747-752 ◽  
Author(s):  
Vladimír Benko ◽  
Ľudovít Fillo ◽  
Peter Kendický ◽  
Veronika Knapcová
Keyword(s):  
Civil Engineering ◽  
Design Method ◽  
Concrete Strength ◽  
Bending Moment ◽  
Concrete Columns ◽  
European Standard ◽  
Compression Strain ◽  
Significant Deficit ◽  
The Stability ◽  
Slender Columns

The European Standard [1] for design of concrete compressed slender members shows a significant deficit in global reliability for the design method based on non-linear analysis. The experimental investigation at the Faculty of Civil Engineering SUT in Bratislava was planned for slender concrete columns made of different concrete strength classes - C45/55, C70/85 and C100/115. A basic aim of the analysis was to design concrete columns subjected to bending moment and axial force where the stability failure proceeds at the compression strain 1.5 ‰. The first of three series of experimental and numerical analyzed columns is presented in the paper. The experiments were realized at the Faculty of Civil Engineering SUT in Bratislava with cooperation of ZIPP Bratislava LTD Company.

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