Advanced Analysis of Staggered Truss of Steel Structure

2012 ◽  
Vol 446-449 ◽  
pp. 615-620
Author(s):  
Wen Wei Yang ◽  
Xu Hong Zhou
Keyword(s):  
Stiffness Matrix ◽  
Plastic Hinge ◽  
Steel Structure ◽  
Structure Design ◽  
Structure Stability ◽  
Analysis And Design ◽  
Element Stiffness Matrix ◽  
Interstory Drift ◽  
Calculation Results ◽  
Advanced Analysis

Based on refined plastic hinge, this paper considers the effects of second-order effects of structure plastic strength, geometric imperfection ,residual stresses to the structure stability by modifying the element stiffness matrix. Use the modified element stiffness matrix to analyze the force of the staggered truss of steel sturcture and compare the calculation results with ANASYS’s. Use the modified element stiffness matrix to analyze interstory drift of the staggered truss of steel sturcture and compare the calculation results with K Jim’s. The result shows that the developed element matrix can accurately calculate the stability capacity and interstory drift of the staggered truss of steel structure. Design by advanced analysis method is the direction of the analysis and design of modern steel structure.

scholarly journals Research on Advanced Analysis Method of Semi-Rigid Steel Frames

2015 ◽  
Vol 9 (1) ◽  
pp. 12-16
Author(s):  
Liu Wei ◽  
Shu Ganping ◽  
Chan Siulai
Keyword(s):  
Stiffness Matrix ◽  
Mechanical Performance ◽  
Plastic Hinge ◽  
Geometrical Nonlinearity ◽  
Steel Frames ◽  
Test Results ◽  
Analysis Method ◽  
Validity And Reliability ◽  
Element Stiffness Matrix ◽  
Advanced Analysis

The advanced analysis method used to analyze semi-rigid steel frames is introduced, and the method could take account of many factors influencing structure mechanical performance. These factors include: initial imperfect mode of structure and members, geometrical nonlinearity (P-∆, P-δ effects), material nonlinearity and semi-rigid connections. The Curved Stability Function (CSF) element is built to take account of initial imperfect state, semi-rigid connections and plastic hinge, and derivatives of the second-order element stiffness matrix to extend the spatial element stiffness matrix. The nonlinearity behavior of semi-rigid connections and plastic hinge are simulated by the spring element. Judgment criteria of plastic hinge and spring stiffness values are determined, as well as of the structure failure. The three semirigid steel frames are directly analyzed by the program named NIDA, and the results of NIDA are comparatively analyzed with test results. It is indicated that the results of NIDA are better compared to the test results, verifying validity and reliability of the advanced analysis method used to analyze semi-rigid steel frames.

scholarly journals Research on the Structural Design of Academic Report Complex Building in a University

2021 ◽  
Vol 293 ◽  
pp. 02006
Author(s):  
Haibo Ren
Keyword(s):  
Structural Design ◽  
Steel Structure ◽  
Structure Design ◽  
Lecture Hall ◽  
Main Function ◽  
Structural System ◽  
Roof Structure ◽  
Structural Calculation ◽  
Calculation Results ◽  
Complex Building

This project is the construction project of the academic report comprehensive building of the Central Youth League School. The main function of the project is the academic report room, including an 800-person lecture hall, a 300-person multi-function lecture hall, a 500-person multi-function lecture hall, an exhibition hall, etc., and three underground floors. There are three floors above the ground, and one floor is partially high. There are 12.8, 13.8, 15.7, 18.2, 18.6, 20.8, 27.8 meters in the sub-regions of the roof structure elevation. This article introduces the structural system, the judgment of structural out-of-limit situations, prestress design, steel truss design, suspension steel structure design, cantilevered large-span concrete beams, etc., through a variety of structural calculation and analysis methods, and find out structural weaknesses, and adopt Corresponding seismic strengthening measures, the calculation results show that the structure has good seismic performance and can meet the requirements of the code.

Kinematics and Dynamics Simulation Research for Roller Coaster Multi-Body System

2011 ◽  
Vol 421 ◽  
pp. 276-280 ◽  
Author(s):  
Ge Ning Xu ◽  
Hu Jun Xin ◽  
Feng Yi Lu ◽  
Ming Liang Yang
Keyword(s):  
Structural Design ◽  
3D Model ◽  
Structure Design ◽  
Dynamics Simulation ◽  
Body System ◽  
Load Spectrum ◽  
Roller Coaster ◽  
Simulation Research ◽  
Calculation Results ◽  
Multi Body

To assess the roller coaster multi-body system security, it is need to extract the running process of kinematics, dynamics, load spectrum and other features, as basis dates of the roller coaster structural design. Based on Solidworks/motion software and in the 3D model, the calculation formula of the carrying car velocity and acceleration is derived, and the five risk points of the roller coaster track section are found by simulation in the running, and the simulation results of roller coaster axle mass center velocity are compared with theoretical calculation results, which error is less than 4.1%, indicating that the calculation and simulation have a good fit and providing the evidence for the roller coaster structure design analysis.

scholarly journals Validation of Csd Advanced Analysis of Braced Frame Responses Using Subframe Experimental Investigations

2018 ◽  
Vol 64 (2) ◽  
pp. 111-146
Author(s):  
A.M Barszcz
Keyword(s):  
Plastic Hinge ◽  
Stiffness Degradation ◽  
Experimental Investigations ◽  
Deformation Model ◽  
Global Response ◽  
Braced Frame ◽  
Steel Framing ◽  
Angle Section ◽  
Tension And Compression ◽  
Advanced Analysis

AbstractThis paper deals with a Continuous Stiffness Degradation (CSD) version of advanced analysis of braced steel framing. It is based on the gradual stiffness degradation concept of frame and truss members. A novelty of the approach presented herein is related to the introduction of the bracing member response in the whole range of its behaviour in tension and compression, including the post-limit range. The validation of the proposed advanced analysis is performed for braced framework with rolled angle section braces. The validation of the brace force-deformation model has been presented in the author’s earlier publication. The basis for the presented CSD advanced analysis is briefly summarized and its difference with regard to the Refined Plastic Hinge (RPH) version of advanced analysis is emphasized. Experimental investigations dealing with tests on portal braced sub-frame specimens are referred to briefly. Results of the experimental investigations are presented in the form of a frame global response and they are used for the validation of the developed computational model.

scholarly journals Plastic hinge location in columns of steel frames subjected to seismic actions

2008 ◽  
Vol 41 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Brian H. H. Peng ◽  
Gregory A. MacRae ◽  
Warren R. Walpole ◽  
Peter Moss ◽  
Rajesh Dhakal ◽  
...  
Keyword(s):  
Axial Force ◽  
Plastic Hinge ◽  
Time History ◽  
Steel Structure ◽  
Braced Frames ◽  
Moment Frames ◽  
Eccentrically Braced Frames ◽  
Moment Connection ◽  
History Analysis ◽  
Active Link

Several steel structure standards around the world contain an equation to encourage any column flexural yielding during earthquake shaking to occur at the column ends, rather than along the column length. The accuracy of these equations and their applicability to columns of both moment frames and braced frames are examined in this paper. It is shown, using an analytical procedure developed from first principles considering the reduction in member stiffness from axial force due to geometric and material nonlinearity, that the existing code equations are conservative. Less conservative empirical equations are developed based on the analysis results. It is found that these equations are applicable to frames with a braced connection, rather than a moment connection into the column. Time-history analysis of eccentrically-braced frames with inverted V-bracing, where the active link occurs at the centre of the beam, is carried out. The likely column end moment ratio needed for the new equations is determined. The analysis also shows that yielding often did not occur in the bottom story columns during earthquake excitations. A simple check is proposed to relate the axial force limit and the design drift to flexural yielding of columns which can be used in conjunction with the proposed equations.

Constructing zigzag-like hollow mesoporous nanospheres MoO2/C with superior lithium storage performance

2021 ◽  
Author(s):  
Wencai Zhao ◽  
Y.F. Yuan ◽  
S.M. Yin ◽  
Gaoshen Cai ◽  
S.Y. Guo
Keyword(s):  
Reaction Kinetics ◽  
Discharge Capacity ◽  
Amorphous Carbon ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Structure Design ◽  
Structure Stability ◽  
Lithium Storage

Abstract Hollow mesoporous nanospheres MoO2/C are successfully constructed through metal chelating reaction between molybdenum acetylacetone and glycerol as well as the Kirkendall effect induced by diammonium hydrogen phosphate. MoO2 nanoparticles coupled by amorphous carbon are assembled to unique zigzag-like hollow mesoporous nanosphere with large specific surface area of 147.7 m2 g-1 and main pore size of 8.7 nm. The content of carbon is 9.1%. As anode material for lithium-ion batteries, the composite shows high specific capacity and excellent cycling performance. At 0.2 A g-1, average discharge capacity stabilizes at 1092 mAh g-1. At 1 A g-1 after 700 cycles, the discharge capacity still reaches 512 mAh g-1. Impressively, the composite preserves intact after 700 cycles. Even at 5 A g-1, the discharge capacity can reach 321 mAh g-1, exhibiting superior rate capability. Various kinetics analyses demonstrate that in electrochemical reaction, the proportion of the surface capacitive effect is higher, and the composite has relatively high diffusion coefficient of Li ions and fast faradic reaction kinetics. Excellent lithium storge performance is attributed to the synergistic effect of zigzag-like hollow mesoporous nanosphere and amorphous carbon, which improves reaction kinetics, structure stability and electronic conductivity of MoO2. The present work provides a new useful structure design strategy for advanced energy storage application of MoO2.

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