Application of Two Damage Identification Methods Based on Sensitivity Analysis in Steel Structure

2014 ◽  
Vol 941-944 ◽  
pp. 2279-2283
Author(s):  
Yu Ying Wang ◽  
Wen Xiu Sun
Keyword(s):  
Sensitivity Analysis ◽  
Finite Element ◽  
Damage Identification ◽  
Steel Structure ◽  
Research Area ◽  
Space Structure ◽  
Steel Frame ◽  
Frame Structure ◽  
Element Analysis ◽  
Identification Methods

Structure damage identification is a hot research area internationally in recent years. Two damage identification methods based on sensitivity analysis are concluded. A three-tier steel frame structure model is established through utilizing ANSYS10.0, the software of finite element analysis. Through modal analysis of finite element, the frequency and formation before and after damage are obtained. The position of damage of the model is fixed by applying two damage indexes. It is indicated from the results that these two methods are effective for damage identification of the space structure of steel frame.

The Design Review and Optimization of the Special-Shaped Steel Frame Structure

2010 ◽  
Vol 163-167 ◽  
pp. 600-604
Author(s):  
Ke Dong Tang ◽  
Jian Fu ◽  
Jun Dai ◽  
Peng Zhang ◽  
Rui Feng Yu
Keyword(s):  
Circulating Fluidized Bed ◽  
Reference Value ◽  
Steel Structure ◽  
Steel Frame ◽  
Frame Structure ◽  
Boiler Steel ◽  
Element Analysis ◽  
Structure Reliability ◽  
Calculation Results ◽  
Steel Frame Structure

According to the finite element analysis of a circulating fluidized bed boiler steel frame structure, the essay concludes to the calculation results of the main steel structure, moreover the structure and the composition of bars are adjusted and optimized which improve the safety of the structure reliability and reduce the volume of steel. All of the above contents have certain reference value on the similar structure.

Simulation Study on Construction Process of Complex Spatial Steel Structure Based on the Construction Mechanics

2012 ◽  
Vol 226-228 ◽  
pp. 1209-1213
Author(s):  
Wei Lin Zhang ◽  
Zhi Xin Wu ◽  
Bai Hui Chen
Keyword(s):  
Finite Element ◽  
Steel Structure ◽  
Frame Structure ◽  
Construction Process ◽  
Element Analysis ◽  
Large Span ◽  
Critical Control Points ◽  
Construction Step ◽  
Construction Mechanics ◽  
Construction Condition

The construction process of the large span spatial steel structure was studied by finite element method and the time-varying mechanics. The construction process of complex spatial frame structure was divided into the installation and dismount supporting phase, and each stage was divided into 15 steps in which mainly simulated and analyzed the whole construction process by "life-death" element. The critical control points of each construction step were identified, the stress state, interval value and the maximum stress in the structure of each construction condition were conformed; rod deformation in construction process was analyzed in construction program. The result showed that the large span spatial steel structure construction scheme was numerical simulated and calculated by the method of finite element analysis and the mechanical state, deformation and safety of building structure were predicted accurately during construction.

scholarly journals Design and Model Test of a Modularized Prefabricated Steel Frame Structure with Inclined Braces

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Xuechun Liu ◽  
Ailin Zhang ◽  
Jing Ma ◽  
Yongqiang Tan ◽  
Yu Bai
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Design Method ◽  
Steel Structures ◽  
Steel Frame ◽  
Frame Structure ◽  
Element Analysis ◽  
High Rise ◽  
High Degree ◽  
Steel Frame Structure

Modularized prefabricated steel structures have become the preferred design in the industrialization of steel structures due to their advantages of fast construction speed, high degree of industrialization, low labour intensity, and more. Prefabricated steel structures have some engineering applications, but all are low-rise structures with few applications in the field of high-rise buildings. Using finite element analysis with line and solid elements, full-scale experiments were conducted to study the single-span frame, which is the core load-bearing part of a modularized prefabricated high-rise steel frame structure with inclined braces. The mechanical mechanisms, computation methods, and design formulas of truss girders were obtained by comparing the finite element and model experiments and building a theoretical and experimental basis for the compilation of design codes. The mechanical characteristics under design load, the deformation and stress state, the elastic-plastic law of development, and the yield failure mode and mechanism under horizontal ultimate load were also obtained. Based on theoretical analysis, finite element analysis, and experiments, the design method of this frame was summarized and incorporated into the design code.

Seismic Behavior Analysis of Beam-Column Joints of Steel Structure Semirigid

2012 ◽  
Vol 166-169 ◽  
pp. 978-983
Author(s):  
Yanhui Ge ◽  
Guo Su
Keyword(s):  
Finite Element ◽  
Seismic Behavior ◽  
Steel Structure ◽  
Steel Frame ◽  
Frame Structure ◽  
Finite Element Program ◽  
Finite Element Software ◽  
End Plate ◽  
Plate Connection ◽  
Steel Frame Structure

In order to study the seismic behavior of steel frame structure, based on the verification of the finite element program, two different end-plate connections under monotonic load and cyclic load are analysed with the finite-element software ANSYS, considering geometry, material and status nonlinearity. Some parameters such as height of endplate, array of blot, diameter of blot are analysed to study their effects on the seismic behavior of beam-to-column end-plate connection, the bearing capacity of the joint of the framework, the initial rotation stiffness, the ultimate turning power, power-wasting capacity and ductility. The results show that reasonable connection have better power-wasting capacity and ductility , so it can be applicated in multiple-story steel frame structure.

Finite Element Analysis on Steel Frame Structure of Mobile Buildings

2014 ◽  
Vol 578-579 ◽  
pp. 703-706
Author(s):  
Xue Feng Cai ◽  
Zheng Zhang ◽  
Yong Chao Ma ◽  
Ji Zhong Zhou
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Simple Structure ◽  
Steel Frame ◽  
Frame Structure ◽  
Steel Buildings ◽  
Element Analysis ◽  
Calculation Results ◽  
Design Loads ◽  
Steel Frame Structure

Mobile steel building is a prefabricated building built in a factory, with advantages on moving conveniently, simple structure and scalability. For mobile steel buildings there are still not enough researches on the mechanical properties and mechanism of action, and there are still not enough relevant standards and requirements to conduct the design and construction of the buildings. In order to precede to theoretical study on steel frame structure of mobile buildings a method by Finite Element Analysis was proposed. This method is based on FEA software, Ansys. Using this method a two-story frame structure model was analyzed. The calculation results of lateral deformations under design loads by FEA were obtained and discussed.

The Research of the Impact of Dynamic Analysis from the Stiffness of the Light Steel Floor of the Steel Frame

2013 ◽  
Vol 772 ◽  
pp. 47-51
Author(s):  
Chun Xia Gong ◽  
Cao Xi
Keyword(s):  
Finite Element ◽  
Dynamic Analysis ◽  
Steel Frame ◽  
Frame Structure ◽  
Element Analysis ◽  
Calculation Results ◽  
Set Up ◽  
Frame Set ◽  
Steel Frame Structure ◽  
The Impact

This paper uses ANSYS10.0 to make modal analysis of the finite element models of the light steel frame. Set up two finite element analysis models with different stiffness of floor, one with the rigid floor assumption, another kind with the light steel floor,so as to research the influence of the calculation results of dynamic analysis. According to the analysis results,we can get that how to define the stiffness of floor is more accurate when design the light steel frame structure. So that to provide the theoretical basis for the designing of light steel frame constructions.

Experimental Research and Finite Element Analysis on Behavior of Steel Frame with Semi-Rigid Connections

2010 ◽  
Vol 168-170 ◽  
pp. 553-558
Author(s):  
Feng Xia Li ◽  
Bu Xin
Keyword(s):  
Architectural Design ◽  
Plastic Hinge ◽  
Steel Frames ◽  
Seismic Energy ◽  
Internal Force ◽  
Steel Frame ◽  
Frame Structure ◽  
Element Analysis ◽  
Rigid Deformation ◽  
Steel Frame Structure

Most steel beam-column connections actually show semi-rigid deformation behavior that can contribute substantially to overall displacements of the structure and to the distribution of member forces. Steel frame structure with semi-rigid connections are becoming more and more popular due to their many advantages such as the better satisfaction with the flexible architectural design, low inclusive cost and environmental protect as well. So it is very necessary that studying the behavior of those steel frame under cyclic reversal loading. On the basics of connections experiments the experiment research on the lateral resistance system of steel frame structure has been completed. Two one-second scale, one-bay, two-story steel frames with semi-rigid connections under cyclic reversal loading. The seismic behavior of the steel frames with semi-rigid connections, including the failure pattern, occurrence order of plastic hinge, hysteretic property and energy dissipation, etc, was investigated in this paper. Some conclusions were obtained that by employing top-mounted and two web angles connections, the higher distortion occurred in the frames, and the internal force distributing of beams and columns was changed, and the ductility and the absorbs seismic energy capability of steel frames can be improved effectively.

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