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Analysis of Key Elements of Truss Structures Based on the Tangent Stiffness Method

Jian Feng, Changtong Li, Yixiang Xu, Qian Zhang, Fang Wang, and Jianguo Cai
2020 Symmetry  
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

Raghavan Ramalingam
2017 IOP Conference Series: Earth and Environment  
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

Michael H. Scott, Terje Haukaas
2008 Journal of computing in civil engineering  
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

A.M Barszcz
2018 Archives of Civil Engineering  
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

Seung-Eock Kim, Wai-Fah Chen
1999 Engineering structures  
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

J. P. Conte, P. K. Vijalapura, M. Meghella
2003 Journal of engineering mechanics  
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

Dominika Opatowicz, Urszula Radoń, Paweł Zabojszcza
2020 Buildings  
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]

K.S. Lee, S.E. Han
2012 Volume 8 Number 3  
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

Zdeněk Kala, N. Mastorakis, V. Mladenov, A. Bulucea
2016 MATEC Web of Conferences  
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

Xiao Zhu, Ge Ou, Li Tian
2021 Shock and Vibration  
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

Jiann-Tsair Chang
2004 Finite elements in analysis and design  
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

Sheng-En Fang, Chen Wu, Xiao-Hua Zhang, Li-Sen Zhang, Zhi-Bin Wang, Qing-Yi Zeng
2021 Materials  
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

Binkai Li, Yu Gong, Yukui Gao, Mengqing Hou, Lei Li
2022 Materials  
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

Serap Altın, Kubilay Kaptan, Semih S. Tezcan
2012 Open Journal of Civil Engineering  
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

Jian Feng, Yifu Sun, Yixiang Xu, Fang Wang, Qian Zhang, Jianguo Cai
2021 Buildings  
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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