The Energy Solutions for the Stability of Tower Crane

2012 ◽  
Vol 170-173 ◽  
pp. 3159-3165
Author(s):  
Ming Xin Huang ◽  
Jian Ping Xu ◽  
Jian Guo Wu
Keyword(s):  
Energy Method ◽  
Buckling Load ◽  
Tower Crane ◽  
The Stability ◽  
Design And Construction

The energy method is used to solve the buckling load of tower crane. It can conclude the effect law on the stability of different section parameters of tower crane and thus provides some references for the design and construction of tower crane.

Uncertainty Model of Concrete Elastic Modulus Effect to Critical Reinforced Concrete Buckling Load

2014 ◽  
Vol 931-932 ◽  
pp. 525-528
Author(s):  
Sanguan Vongchavalitkul
Keyword(s):  
Elastic Modulus ◽  
Stability Analysis ◽  
Statistical Data ◽  
Stability Index ◽  
Buckling Load ◽  
Design Code ◽  
Critical Buckling Load ◽  
Uncertainty Model ◽  
The Stability ◽  
The Impact

There are differences in each countrys design code for concrete elastic modulus that cause uncertainty in stability analysis of critical buckling load column. This paper investigates the impact of uncertainty on concrete elastic modulus for designing of critical buckling load of building column. The statistical data on materials and applied load being collected in Thailand are used together with an investigation on the uncertainty of the concrete elastic modulus in the design code from 8 countries. Finally the Monte Carlo simulation is used to find out the stability index in term of reliability index. The results show that the uncertainty of the concrete elastic modulus plays an important role in stability analysis and should be considered in the design.

Buckling Analysis of Symmetric Cross-Ply Laminated Annular Plates with Carbon Nanotubes

2014 ◽  
Vol 592-594 ◽  
pp. 901-905
Author(s):  
Pankaj Kumar ◽  
Pandey Ramesh
Keyword(s):  
Carbon Nanotubes ◽  
Boundary Condition ◽  
Carbon Nanotube ◽  
Aspect Ratio ◽  
Energy Method ◽  
Buckling Analysis ◽  
Buckling Load ◽  
Buckling Loads ◽  
Annular Plates ◽  
Buckling Behavior

The Paper presents the buckling response of composite annular plates with under uniform internal and external radial edge loads using energy method. For the equation of stability Trefftez rule is used. The paper consists of buckling behavior of laminate (90/0) s, influence of some parameters such as thickness, boundary condition, aspect ratio on buckling loads and modes are investigated. Present results are compared with other papers. In this paper the effect of % weight of carbon nanotube (MWCNT) on the buckling load is also investigated.

Stability and Safety Analysis of Braced Excavation for Subway Station during Construction under the Condition of Side Slope

2011 ◽  
Vol 99-100 ◽  
pp. 1166-1170 ◽  
Author(s):  
Yuan Hai Li ◽  
Ping Liu ◽  
Ji Qiang Liu ◽  
Xue Feng Han
Keyword(s):  
Safety Analysis ◽  
Construction Safety ◽  
The Other ◽  
Steel Pipe ◽  
Subway Station ◽  
Stability Coefficient ◽  
Braced Excavation ◽  
Side Slope ◽  
The Stability ◽  
Design And Construction

The main purpose of this paper is to analyze the stability and safety problems of braced excavation enclosure, surrounding strata and side slope during construction of Shangshuijing station in Shenzhen Metro Line 5. The paper presents stability discrimination of the braced excavation and side slope by discussing their force and deformation regularity using Flac3D, and puts forward some project proposals about its design and construction. The results show that: (1) The stability coefficient of braced excavation enclosure becomes smaller because of biasing impact of side slope, but this project can meet the stability requirements, (2) The biasing impact of side slope has little influence on deformation of surrounding strata starting on the other side of braced excavation without slope, and (3) To ensure construction safety under condition of side slope, the braced excavation should be excavated starting from the zone far from the side slope, steel pipe can be used as assistant reinforcement at the corner of side slope if necessary.

Soil-Pile Coupling Analysis of Steel Sheet Pile Bulkhead under Horizontal Loads

2015 ◽  
Vol 744-746 ◽  
pp. 1180-1183 ◽  
Author(s):  
Hong Wang ◽  
Peng Liu ◽  
Xiang Liu ◽  
Jin Gang Duan
Keyword(s):  
Large Scale ◽  
Steel Sheet ◽  
Academic Support ◽  
Load Rating ◽  
Sheet Pile ◽  
Natural Conditions ◽  
Coupling Analysis ◽  
Improve Design ◽  
The Stability ◽  
Design And Construction

With the development of steel sheet pile bulkhead gradually toward large-scale and deep water, natural conditions become worse and structural load rating continues to improve, design and construction of steel sheet pile bulkhead needs higher requirements. Then the stability of sheet pile bulkhead under horizontal loads becomes particularly prominent. This paper presents the displacement and stress of steel sheet pile bulkhead structure under different horizontal loads using ANSYS, which provide academic support for the design and construction of steel sheet pile bulkhead.

scholarly journals Improving the energy method for calculating beams with a narrow rectangular section on the side buckling

2020 ◽  
Vol 164 ◽  
pp. 02033
Author(s):  
Serdar Yazyev ◽  
Anastasia Lapina ◽  
Ivan Zotov ◽  
Anton Chepurnenko ◽  
Irina Doronkina
Keyword(s):  
Analytical Solution ◽  
Total Energy ◽  
Energy Method ◽  
Strain Energy ◽  
Vertical Displacement ◽  
Center Of Gravity ◽  
Rectangular Section ◽  
Minimum Total Energy ◽  
The Stability ◽  
External Forces

We propose an improved version of the energy method in calculating rectangular beams for the stability of a flat bending shape. The essence of this variant of the method is to use the principle of the minimum total energy instead of the condition for the equality of the potential strain energy and the work of external forces. This version of the method makes it easy to obtain a numerical-analytical solution for any number of members of series. The solution of the problem for a pivotally supported beam is presented taking into account the vertical displacement of the load relative to the center of gravity.

Lp ENERGY METHOD FOR MULTI-DIMENSIONAL VISCOUS CONSERVATION LAWS AND APPLICATION TO THE STABILITY OF PLANAR WAVES

2004 ◽  
Vol 01 (03) ◽  
pp. 581-603 ◽  
Author(s):  
SHUICHI KAWASHIMA ◽  
SHINYA NISHIBATA ◽  
MASATAKA NISHIKAWA
Keyword(s):  
Conservation Laws ◽  
Energy Method ◽  
Optimal Convergence Rate ◽  
Estimates Of Solutions ◽  
Interpolation Inequalities ◽  
Optimal Decay ◽  
Viscous Conservation Laws ◽  
The Cauchy Problem ◽  
Whole Space ◽  
The Stability

We introduce a new Lp energy method for multi-dimensional viscous conservation laws. Our energy method is useful enough to derive the optimal decay estimates of solutions in the W1,p space for the Cauchy problem. It is also applicable to the problem for the stability of planar waves in the whole space or in the half space, and gives the optimal convergence rate toward the planar waves as time goes to infinity. This energy method makes use of several special interpolation inequalities.

Precise Stability Analysis of Stepped Telescopic Booms and Practical Algorithm

2013 ◽  
Vol 395-396 ◽  
pp. 871-876
Author(s):  
Liang Du ◽  
Peng Lan ◽  
Nian Li Lu
Keyword(s):  
Stability Analysis ◽  
Differential Equations ◽  
Characteristic Equation ◽  
Energy Method ◽  
Cross Sectional ◽  
Component Method ◽  
Practical Algorithm ◽  
The Stability ◽  
Precise Expression ◽  
Constant Section

To analyze the stability of stepped telescopic booms accurately, using vertical and horizontal bending theory, this paper established the deflection differential equations of stepped column model of arbitrary sectioned telescopic boom, the stability were analyzed, and obtained the precise expression of the buckling characteristic equation; Took certain seven-sectioned telescopic booms as example, by comparing the results with ANSYS, the accuracy of the equations deduced in this paper was verified. Presented the equivalent component method for the stability analysis of multi-stepped column, the equivalent cross-sectional moment of inertia was deduced by energy method, thus the stability of stepped column equivalent to that of constant section component. By comparing the results with exact value, the precision of equivalent component method was verified which was convenient for stability analysis of telescopic boom.

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