Research on Structure Design of Cable-Stayed Bridge

2012 ◽  
Vol 178-181 ◽  
pp. 2565-2569
Author(s):  
Xi Li ◽  
Ting Ting Cai
Keyword(s):  
Dynamic Analysis ◽  
Static Analysis ◽  
Transportation Problem ◽  
Daily Life ◽  
Structure Design ◽  
Large Span ◽  
Cable Stayed Bridge

Bridge is a kind of structure that is common in our daily life, it connect both sides of rivers, lakes, and even channels, also sometimes it is used to solve transportation problem, just like overpasses. Cable-Stayed Bridge because of its special advantages (large-span with fewer piers) is playing an increasingly important role now. In this work we made some research on structure design of Cable-Stayed Bridge, static analysis, dynamic analysis and Construction of the structure was proposed.

Comparison of Static and Dynamic Analysis on KJYF96/8 Mobile Refuge Chamber

2014 ◽  
Vol 670-671 ◽  
pp. 892-895
Author(s):  
An Ning Zhang ◽  
Yu Ming Gu
Keyword(s):  
Dynamic Analysis ◽  
Static Analysis ◽  
Dynamic Pressure ◽  
External Pressure ◽  
Structure Design ◽  
Weighting Method ◽  
Static And Dynamic Analysis ◽  
Finite Element Software ◽  
Pressure Peak ◽  
The Difference

This paper studied the difference between the static analysis and dynamic analysis on the mobile refuge chamber. The structure strength static analysis of KJYF96/8 mobile refuge chamber was made by the finite element software SolidWorks Simulation and the stress cloud chart and the displacement cloud chart were obtained. The corresponding relation between the dynamic analysis result and the static analysis result was obtained based on the comparison with the result of the dynamic analysis. The results indicate that the values of the max stress and displacement by static analysis with a uniform external pressure of the dynamic pressure peak value are greater than those by dynamic analysis. And the weighting method of static analysis can be used in the coal mine mobile refuge chamber structure design process instead of dynamic analysis.

scholarly journals Local and global assessments of a subsea riser-spool connection under dropped impact loads

2021 ◽  
Vol 1201 (1) ◽  
pp. 012049
Author(s):  
Z Liu ◽  
R Igland ◽  
S Bruaseth
Keyword(s):  
Energy Level ◽  
Dynamic Analysis ◽  
Static Analysis ◽  
Numerical Study ◽  
Structure Design ◽  
Time Range ◽  
Impact Loads ◽  
Static And Dynamic Analysis ◽  
Impact Impulse ◽  
The Impact

Abstract Subsea riser tube and spool is often used together to connect the riser of jacket to flowline or pipeline. Due to its limited size (less than 200 m), the location is within the lifting zones of the platform. Consequently, the dropped object hazard has potential high risk and needs to be checked. This paper presents a numerical study on accessing the structural dynamics of a subsea riser connection under the dropped container impact loads. De-coupled local and global models were established. The impact impulse was obtained from local impact analysis by Abaqus Explicit solver, in which deformations from container and pipeline are both captured. The impact energy level is in line with the risk assessment. The global model was built by ANSYS APDL macros. A simple input file is only needed for end users. The nonlinear pipe and soil interaction are included in a simplified manner. The model comprises of static and dynamic analysis parts. The static analysis captures the in-place configuration and the functional loads. The dynamic analysis is a restart with inherited stress state from static analysis. The impact impulse was applied by point loads in a certain time range. The nonlinear soil stiffness was approached by spring elements (compression only). The dynamic analysis was done in a longer time, ensuring to capture any dynamic effects. The interface loads at the riser stick-out and riser anchor are both extracted and discussed. It is shown that present structure design can withstand the dropped loads at the input energy level.

Research on the Structural System of Kilometer-Scale Cable-Stayed Bridges

2011 ◽  
Vol 71-78 ◽  
pp. 470-475
Author(s):  
Chang Peng Liu ◽  
Wei Ming Yan ◽  
Yan Jiang Chen ◽  
Da Xing Zhou ◽  
Xi Gang Zhang
Keyword(s):  
Dynamic Analysis ◽  
Static Analysis ◽  
21St Century ◽  
Structural System ◽  
Viscous Dampers ◽  
Elastic Links ◽  
Cable Stayed Bridge ◽  
The World ◽  
Research Objects ◽  
Cable Stayed Bridges

At the beginning of the 21st century, Su-tong and Stonecutters cable-stayed bridges were born into the world, which make the original span record of 890m up to 1088m. The increasing range of the span is so large that it is necessary to carry out a special research on structural system of the cable-stayed bridge with kilometer-scale span. Therefore, two cable-stayed bridges have been designed as the research objects, which come from the background of Su-tong cable-stayed bridge. And the main span is respectively 1308m and 1500m. In this paper, an analysis is carried out from the aspect of girder-tower relationship which comes from the concept of the structural system. In the static analysis, structural system, which is respectively floating, half floating and rigid, has been studied. And in the dynamic analysis, the girder-tower relationship has also been studied, which is respectively with no dampers, elastic links and viscous dampers. Based on the analysis results, structural system applicable for kilometer-scale cable-stayed bridges is summarized.

Static and Dynamic Analysis of Intake Tower Structure

2013 ◽  
Vol 444-445 ◽  
pp. 912-915 ◽  
Author(s):  
Yong Xing Jiang ◽  
Jin Chao Yue ◽  
Ling Min Ye
Keyword(s):  
Dynamic Analysis ◽  
Static Analysis ◽  
Structural Design ◽  
Structure Design ◽  
Hydropower Station ◽  
Static And Dynamic Analysis ◽  
Tower Structure ◽  
Internal Forces ◽  
Design Requirements ◽  
Distribution Of Stress

Taking intake tower of Hydropower Station project for an example, ANSYS is used on the intake tower dynamic, static analysis, to study the distribution of stress and displacement as well as structural stability. The results show that, under load, the deformation and stability of the intake tower to meet the structural design requirements, need to take special measures in the weak parts of the internal forces in the structural design. The results in this paper may be served as the basis of structure design of the intake tower.

scholarly journals Demadroid: Object Reference Graph-Based Malware Detection in Android

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Huanran Wang ◽  
Hui He ◽  
Weizhe Zhang
Keyword(s):  
Dynamic Analysis ◽  
Static Analysis ◽  
Graph Matching ◽  
Daily Life ◽  
Malware Analysis ◽  
Dynamic Information ◽  
Android Malware ◽  
Actual Use ◽  
Reference Graph ◽  
Object Reference

Smartphone usage has been continuously increasing in recent years. In addition, Android devices are widely used in our daily life, becoming the most attractive target for hackers. Therefore, malware analysis of Android platform is in urgent demand. Static analysis and dynamic analysis methods are two classical approaches. However, they also have some drawbacks. Motivated by this, we present Demadroid, a framework to implement the detection of Android malware. We obtain the dynamic information to build Object Reference Graph and propose λ-VF2 algorithm for graph matching. Extensive experiments show that Demadroid can efficiently identify the malicious features of malware. Furthermore, the system can effectively resist obfuscated attacks and the variants of known malware to meet the demand for actual use.

Innovation design of a ballastless cable-stayed bridge with main span of 300m in high-speed railway

2018 ◽  
Author(s):  
Li Diping
Keyword(s):  
Composite Beam ◽  
High Speed ◽  
Technical Problem ◽  
Local Deformation ◽  
Structure Design ◽  
Steel Bridge ◽  
High Speed Railway ◽  
Large Span ◽  
Cable Stayed Bridge ◽  
Ballastless Track

<p>Right now, for bridges paved with ballastless track on high-speed railway with operating speed of 350km per hour in the world, the maximum span is 185m, and larger span bridges are all paved with ballasted track. The speed of the train passing through the large span bridge has to be limited to be not more than 250km per hour, which becomes a neck for high-speed trains running on the whole line. Laying ballastless track on large span bridges has become a technical problem to expand application range of ballastless track. This paper is based on a cable-stayed bridge with main span of 300m. For this bridge, prestressed concrete box girders are used for edge span and box steel-concrete composite beam is used for mid-span. Cable-stayed bridge is a flexible structure, and the stiffness must be the problem to be solved first for high-speed railway. The hybrid girder and the composite beam for the middle span can increase the deadweight stiffness. Relative to the steel bridge deck, concrete deck has larger stiffness and smaller local deformation, which makes it more conducive to high-speed traffic. The technology of laying ballastless track in the concrete slabis mature. This bridge is the first cable-stayed bridge paved with ballastless track on high-speed railway with design speed of 350km per hour in our country. This paper focuses on the conception, structure design and innovation points of the bridge. And the adaptability of high-speed railway ballastless track to the bridge is also analyzed.</p>

scholarly journals Automatic Malicious Code Classification System through Static Analysis Using Machine Learning

Symmetry ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 35
Author(s):  
Sungjoong Kim ◽  
Seongkyu Yeom ◽  
Haengrok Oh ◽  
Dongil Shin ◽  
Dongkyoo Shin
Keyword(s):  
Machine Learning ◽  
Static Analysis ◽  
Information And Communication Technology ◽  
Communication Technology ◽  
Classification System ◽  
Daily Life ◽  
Malicious Code ◽  
Access To Information ◽  
Analysis Method ◽  
Information And Communication

The development of information and communication technology (ICT) is making daily life more convenient by allowing access to information at anytime and anywhere and by improving the efficiency of organizations. Unfortunately, malicious code is also proliferating and becoming increasingly complex and sophisticated. In fact, even novices can now easily create it using hacking tools, which is causing it to increase and spread exponentially. It has become difficult for humans to respond to such a surge. As a result, many studies have pursued methods to automatically analyze and classify malicious code. There are currently two methods for analyzing it: a dynamic analysis method that executes the program directly and confirms the execution result, and a static analysis method that analyzes the program without executing it. This paper proposes a static analysis automation technique for malicious code that uses machine learning. This classification system was designed by combining a method for classifying malicious code using a portable executable (PE) structure and a method for classifying it using a PE structure. The system has 98.77% accuracy when classifying normal and malicious files. The proposed system can be used to classify various types of malware from PE files to shell code.

scholarly journals Hypervisor-assisted dynamic malware analysis

Cybersecurity ◽  
2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Roee S. Leon ◽  
Michael Kiperberg ◽  
Anat Anatey Leon Zabag ◽  
Nezer Jacob Zaidenberg
Keyword(s):  
Dynamic Analysis ◽  
Static Analysis ◽  
Cyber Security ◽  
Malware Analysis ◽  
Analysis Tools ◽  
Significant Performance

AbstractMalware analysis is a task of utmost importance in cyber-security. Two approaches exist for malware analysis: static and dynamic. Modern malware uses an abundance of techniques to evade both dynamic and static analysis tools. Current dynamic analysis solutions either make modifications to the running malware or use a higher privilege component that does the actual analysis. The former can be easily detected by sophisticated malware while the latter often induces a significant performance overhead. We propose a method that performs malware analysis within the context of the OS itself. Furthermore, the analysis component is camouflaged by a hypervisor, which makes it completely transparent to the running OS and its applications. The evaluation of the system’s efficiency suggests that the induced performance overhead is negligible.

scholarly journals Structure Design of Cable-Stayed Bridge Intelligent Detection Robot

2021 ◽  
Vol 632 ◽  
pp. 022061
Author(s):  
Hongyu He ◽  
Guichuan Hu ◽  
Jing Ren ◽  
Jing Hu ◽  
Hang Zhao ◽  
...  
Keyword(s):  
Structure Design ◽  
Cable Stayed Bridge ◽  
Intelligent Detection
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