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Analysis of Key Elements of Truss Structures Based on the Tangent Stiffness Method
2020
Symmetry
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based on the global stiffness matrix for truss structures. ...
In this paper, according to the tangent stiffness-based method for the element importance, the square pyramid grid was chosen as an example, and the distribution rules of key elements under different support ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/sym12061008
fatcat:4e3k4wqodbf7pls4km6hnitdkq
Failure analysis of lattice tower like structures
2017
IOP Conference Series: Earth and Environment
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This paper presents a nonlinear formulation for analysis of tower structures in an attempt to close the mismatch. ...
Conductor and groundwire tension and sag are influenced by the peak and cross-arm deflections and hence accurate estimates of the tower deflections at service loads are of key interest. ...
The local tangent stiffness, ͭ′ can be written as ͭ′ = ˓ H {V + { (2) whereͭ′ is the element local tangent stiffness and is a single value matrix due to the use of the corotated approach and is the element ...
doi:10.1088/1755-1315/80/1/012024
fatcat:3yedvw5owza2dgghepl6mv7ygy
Software Framework for Parameter Updating and Finite-Element Response Sensitivity Analysis
2008
Journal of computing in civil engineering
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To support response sensitivity analysis, the Strategy design pattern facilitates multiple approaches to evaluate gradients of the structural response, whereas the Visitor pattern ensures that objects ...
All messages to identify and update parameters are passed through a Facade that decouples client applications from the finite-element domain of OpenSees. ...
EEC-9701658 awarded to the Univ. of California, Berkeley and a subaward to Oregon State Univ. made by the Univ. of California, San Diego through Grant No. CNS-0205720. ...
doi:10.1061/(asce)0887-3801(2008)22:5(281)
fatcat:hwfnakg4avdcnbzn7wvlj53jhm
Validation of Csd Advanced Analysis of Braced Frame Responses Using Subframe Experimental Investigations
2018
Archives of Civil Engineering
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It is based on the gradual stiffness degradation concept of frame and truss members. ...
This paper deals with a Continuous Stiffness Degradation (CSD) version of advanced analysis of braced steel framing. ...
= (EA)Tt = ETtA -the nominal value of the truss element tangent stiffness, ETt = ȘNtE -the tangent modulus of elasticity obtained for an imperfect truss element treated as a perfect equivalent with a ...
doi:10.2478/ace-2018-0020
fatcat:jofi4ysvoberpc6bnkxwridnqy
Design guide for steel frames using advanced analysis program
1999
Engineering structures
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The aim of this paper is to provide a design guide of the LRFD based advanced analysis method for practical frame design. ...
The methods are practical and therefore recommended for general use. : S 0 1 4 1 -02 96 ( 9 7 ) 0 0 20 9-5 Key considerations of LRFD and proposed advanced analysis method Key considerations LRFD Proposed ...
The proposed program may be used rigorously for practical design by taking advantage of the small program size, short run time, and simple input format. ...
doi:10.1016/s0141-0296(97)00209-5
fatcat:rlm6lkbpgfdapc2ao2qzhlxxiu
Consistent Finite-Element Response Sensitivity Analysis
2003
Journal of engineering mechanics
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Plasticity-based finite-element models of structural systems subjected to base excitation such as earthquake loading are considered. ...
The procedure to obtain the exact sensitivities of the numerical nonlinear finite-element response, including proper capture of their discontinuities, is formalized. ...
Acknowledgments Support for this research by the main Italian Electricity Company ͑Enel-R&D Department-Centro di Ricerca Idraulica e Struttur-ale͒ is gratefully acknowledged. ...
doi:10.1061/(asce)0733-9399(2003)129:12(1380)
fatcat:aqjr2jhfv5b75ehmpwshiyp4tm
Assessment of the Effect of Wind Load on the Load Capacity of a Single-Layer Bar Dome
2020
Buildings
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In order to explain the effect of the height-to-span ratio on the selection of the appropriate calculation model and method of analysis of the bar dome, an example of the known von Mises truss was proposed ...
The analysis showed that there is a change in stiffness for these structures, and, therefore, that such structures should be designed according to geometric nonlinear analysis (GNA). ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/buildings10100179
fatcat:i6ljjtjkhzasbgyx3h6m5bv7vm
A BIFURCATION ANALYSIS OF SPACE STRUCTURES BY USING 3D BEAM-COLUMN ELEMENT CONSIDERING FINITE DEFORMATIONS AND BOWING EFFECT
[chapter]
2012
Volume 8 Number 3
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The shearing behavior of structure is simulated by introducing membrane and truss elements at the mid-span of girder. ...
A method for large deformation (rotation) analysis of space frame is based on an Eulerian formulation, which takes into consideration the effects of large joint rotations with finite deformation(rotation ...
Based on the seismic coefficient method [24] , the weight of upper structure is calculated. ...
doi:10.18057/ijasc.2012.8.3.4
fatcat:wuymtlvkdvexvnto3i7gpsxfae
Computation of Equilibrium Paths in Nonlinear Finite Element Models
2016
MATEC Web of Conferences
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The methods of stochastic and sensibility analyses which are frequently applied to assessment of the safety and reliability of supporting structural systems are discussed. 2016 , 6 CSCC 4026 ...
Mutual position of limit and bifurcation points was identified. The paper describes multidisciplinary problems of the analysis of limit states of nonlinear systems. ...
Acknowledgment This result was achieved with the financial support of the projects No. LO1408 "AdMAs UP" and GA15-07730S and FAST-S-16-3779. ...
doi:10.1051/matecconf/20167604026
fatcat:i6kw43paongltohswebljwhjte
Investigation and Development of a Three-Dimensional Transmission Tower-Line System Model Using Nonlinear Truss and Elastic Catenary Elements for Wind Loading Dynamic Simulation
2021
Shock and Vibration
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Owing to the high geometry nonlinearity of the transmission line and the complexity of the wind loading, such analysis is often conducted in the commercial software. ...
To cross-validate the developed models on the coupled transmission tower and line, a one-span eight-line system is modeled with different elements and compared with several state-of-the-art commercial ...
tangent stiffness of the transmission line using nonlinear truss element; L refers to transmission line; T refers to truss
element
ALGORITHM 1: Nonlinear Newmark-Beta method ...
doi:10.1155/2021/1959683
fatcat:kph3eoeq2ncafbx5pkchimxf6u
Derivation of the higher-order stiffness matrix of a space frame element
2004
Finite elements in analysis and design
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The derivation has a physical meaning that is the higher-order stiffness matrix can be derived by regarding there is a set of incremental nodal forces existing on the element, then the element undergoes ...
Some numerical examples were tested by taking the proposed higher-order stiffness matrix into consideration in the nonlinear analysis of the structures. ...
In the literature, based on the various variational principles, many geometric nonlinear elements have been generated by researchers, which included truss, frame and plate elements, and so on. ...
doi:10.1016/j.finel.2004.03.003
fatcat:6jfqzvyrdvhzdnmdyvz5eseoje
Progressive Collapse Safety Evaluation of Truss Structures Considering Material Plasticity
2021
Materials
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On this account, a progressive collapse analysis procedure for truss structures is proposed, based on the assumption of elastoplastic materials. ...
Lastly, the proposed method was verified against both analytical and experimental truss structures. ...
In conclusion, the experimental validation proved the feasibility of the proposed method in the progressive collapse analysis of a truss structure. ...
doi:10.3390/ma14185135
pmid:34576359
pmcid:PMC8469360
fatcat:f7xs4bj4bbee7k7yfi5uq6ou54
Failure Analysis of Hat-Stringer-Stiffened Aircraft Composite Panels under Four-Point Bending Loading
2022
Materials
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This indicates the reliability and applicability of the established theoretical model and numerical method for predicting the failure of hat-shaped girder structures. ...
To accurately predict the fatigue failure, a novel theoretical model has been proposed based on the fatigue damage theory. ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/ma15072430
pmid:35407760
pmcid:PMC9000179
fatcat:6gm6zbg43zfvpfvy5wmu5f4i3m
Dynamic Analysis of Suspension Bridges and Full Scale Testing
2012
Open Journal of Civil Engineering
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The first part of the study deals with an iteration scheme for the nonlinear static analysis of suspension bridges by means of tangent stiffness matrices. ...
Various numerical examples are introduced in order to demonstrate the method of analysis. ...
configuration and the internal stress resultants of all constituent elements of the structure are first determined through an iteration routine based on the Newton-Raphson method. ...
doi:10.4236/ojce.2012.22010
fatcat:6sfdsjoetfc3vegm6vpo7wcox4
Robustness Analysis and Important Element Evaluation Method of Truss Structures
2021
Buildings
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It provides a method for rapid robustness analysis of general truss structures, which can be effectively integrated into the existing analysis platform. ...
Moreover, the influences of geometric topology, boundary condition, stiffness distribution and load distribution on the element importance are investigated. ...
A safety assessment method based on a linear static analysis procedure was proposed to evaluate the sensitivity index and key index of structural members for steel truss roofs [28] . ...
doi:10.3390/buildings11100436
fatcat:32orf6gmhbcn3eglcoglhxbppa
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