Performance Based Optimized Design of Steel Structure

2014 ◽  
Vol 919-921 ◽  
pp. 199-202
Author(s):  
Lan Lan Zhang ◽  
Xiao Guang Song ◽  
Jing Juan Zhang
Keyword(s):  
Optimization Design ◽  
Design Principle ◽  
Steel Structure ◽  
Steel Structures ◽  
Construction Cost ◽  
Optimized Design ◽  
Structural System ◽  
Sizing Optimization ◽  
The Past ◽  
Whole Process

During the past two centuries, steel structure has become one of the most popular structural system. How to balance the construction cost, structural properties and other factors is an important aspect needed to be addressed. This paper describes the whole process of performance based optimized design of steel structure. First, the methods on the shape and sizing optimization, cost and others are introduced. Then, the multi-object optimization of steel structure is presented, in which the main aspects of the optimizations are studied. Finally, the design principle and the analytical steps for the multi-object optimization of steel structures are discussed. This paper can be references for the optimization design of steel structures.

Probabilistic Seismic Loss Analysis for the Design of Steel Structures: Optimizing for Multiple-Objective Functions

2016 ◽  
Vol 32 (3) ◽  
pp. 1587-1605 ◽  
Author(s):  
Sanaz Saadat ◽  
Charles V. Camp ◽  
Shahram Pezeshk
Keyword(s):  
United States ◽  
Structural Response ◽  
Time History ◽  
Steel Structure ◽  
Steel Structures ◽  
Earthquake Hazard ◽  
Economic Losses ◽  
Structural System ◽  
Nonstructural Components ◽  
Central United States

An optimized seismic performance-based design (PBD) methodology considering structural and nonstructural system performance and seismic losses is considered to optimize the design of a steel structure. Optimization objectives are to minimize the initial construction cost associated with the weight of the structural system and the expected annual loss (EAL), considering direct economic losses. A non-dominated sorting genetic algorithm method is implemented for the multi-objective optimization. Achieving the desired confidence levels in meeting performance objectives of interest are set as constraints of the optimization problem. Inelastic time history analysis is used to evaluate structural response under different levels of earthquake hazard to obtain engineering demand parameters. Hazus fragility functions are employed for obtaining the damage probabilities for the structural system and nonstructural components. The optimized designs and losses are compared for the structure located in two geographic locations: one in the central United States and another in the western United States.

Wind Load Analysis and the Structure Optimization Design of the Steel Structures with ANSYS

2010 ◽  
Vol 37-38 ◽  
pp. 1643-1646
Author(s):  
Zhao Xin Meng ◽  
Jian Xin Zhao ◽  
Shu Yang Wang ◽  
Nan Zhou
Keyword(s):  
Optimization Design ◽  
Rapid Development ◽  
Three Dimensional ◽  
Steel Structure ◽  
Steel Structures ◽  
Clean Energy ◽  
Wind Load ◽  
Three Dimensional Model ◽  
Design Standards ◽  
Bio Oil

In recent years, the bio-oil, as a new kind of clean energy, has been paid with more attentions and has been in rapid development. Meanwhile, the design and research of the bio-oil equipment also has made a great progress. This paper presented the research of the main unit installed steel structure which was with the 3000t yearly capacity. It analyzed and researched the structure and load characteristics of the bio-oil main unit installed steel structure. According to the related research theory and design standards, by using software ANSYS establish the three-dimensional model of the main unit installed steel structure. The paper also analyzed and calculated the wind load. The model structure has been optimized on the foundation of the analyzing preliminary model foundation. The stability of the equipment has been enhanced.

Effects of Snow Load on Light-Weight Steel Structures

2014 ◽  
Vol 501-504 ◽  
pp. 777-781 ◽  
Author(s):  
Fang Hui Li ◽  
Fan Meng
Keyword(s):  
Construction Industry ◽  
Rapid Development ◽  
Steel Structure ◽  
Steel Structures ◽  
Light Weight ◽  
Structural System ◽  
Snow Load ◽  
The Impact ◽  
Research Situation ◽  
Modern Building

With the rapid development of economic and construction industry, light-weight steel structural system is widely used in the modern building construction. While, the light-weight steel structures are more sensitive under the effect of snow load than the other structure systems according to the data from the large amount of accidents of steel structure failures, which indicated the necessary and urged us to focus on the impact of snow on the light-weight steel structures. This paper introduces the current research situation and analyzes the method of snow load determination on gable frames in the load code of different countries, and provides some suggestions on the snow load design of light-weight steel structures finally.

The Optimization Design of the Explosion-Proof Steel Frame Structure Considering the Material Plastic

2011 ◽  
Vol 243-249 ◽  
pp. 160-164
Author(s):  
Ya Ting Zang ◽  
Yong Sheng Zhang
Keyword(s):  
Optimization Design ◽  
Steel Structure ◽  
Construction Cost ◽  
Structure Design ◽  
Steel Frame ◽  
Frame Structure ◽  
Design Codes ◽  
Steel Frame Structures ◽  
Explosion Load ◽  
Steel Frame Structure

Taking the structure construction cost as the optimized goal, the optimization design is carried on the steel frame structure considering the material plastic, under the explosion load. According to the prevailing steel structure design codes GB50017-2002, the model of steel frame structures is established. The results show that the theory and calculation method is reasonable, which will have a guide in the future.

A summary of beach nourishment in China: The past decade of practices

Shore & Beach ◽  
2020 ◽  
pp. 65-73
Author(s):  
Gen Liu ◽  
Feng Cai ◽  
Hongshuai Qi ◽  
Jianhui Liu ◽  
Gang Lei ◽  
...  
Keyword(s):  
Beach Nourishment ◽  
Developed Countries ◽  
Ecological Design ◽  
Optimized Design ◽  
Limited Information ◽  
Personal Communications ◽  
Design Considerations ◽  
The Past ◽  
Technological Advances ◽  
Urban Beaches

Beach nourishment has been widely used for beach protection around the world. However, there is limited information about beach nourishment in China. This study offers an overview of beach nourishment practices, status and technological advances in China, based on the literature, reports, and personal communications. The results demonstrate that beach nourishment has been recognized as an effective and environmentally friendly measure to combat coastal erosion and has been increasingly adopted in China, especially in the past decade. The unique characteristics of coastal China resulted in a difference in beach nourishment between China and Western developed countries in terms of the types, objectives, and shapes of beach nourishment. For the types of nourishments in China, there were approximately the same number of restored beaches and newly constructed beaches. For fill sediment, homogeneous fill and heterogeneous fill comprised 51.1% and 48.9% of projects, respectively. The objective of beach nourishment was mainly to promote coastal tourism, and the shape of nourished beaches was dominated by headland bays. This study also indicated that China has achieved a number of technological advances in beach nourishment, including methods of beach nourishment on severely eroded coasts and muddy coasts, an optimized design of drain pipes involved in urban beaches, and ecological design considerations. From the past decade of practices, four aspects were proposed as considerations for future nourishment: sand sources, technique advances, ecological effects, and management of beach nourishments.

scholarly journals Shopping Centres, Cycling Accessibility and Planning—The Case of Nova Lund in Sweden

Urban Science ◽  
2020 ◽  
Vol 4 (4) ◽  
pp. 70
Author(s):  
Till Koglin ◽  
Lucas Glasare
Keyword(s):  
Conflicts Of Interest ◽  
Current Situation ◽  
Decision Makers ◽  
Power Structures ◽  
Literature Study ◽  
Shopping Centre ◽  
The Past ◽  
Whole Process ◽  
The Subject

This paper evaluates the history and cycling accessibility of Nova, a shopping centre established in Lund, Sweden, in 2002. The current situation was also analysed through observation and a literature review. Moreover, the study conducted a closer analysis of the history and role of the municipality based on further literature study and interviews with officials. The conclusion of the analysis indicates poor and unsafe bikeways caused by conflicts of interest between politicians, officials, landowners and the general public. It also depicts a situation in which the municipality’s master plan has been ignored, and, in contrast to the local goals, cycling accessibility at Nova has seen no significant improvement since the shopping centre was first established. The reasons for this, arguably, are a relatively low budget for bikeway improvements in the municipality, as well as a situation in which decision-makers have stopped approaching the subject, as a result of the long and often boisterous conflicts it has created in the past. Lastly, it must be noted that it is easy to regard the whole process of Nova, from its establishment to the current situation, as being symptomatic of the power structures between drivers and cyclists that still affect decision-makers at all levels.

Dynamic Characteristics of Base-Isolated Steel Frame under Seismic Ground Motion

2011 ◽  
Vol 255-260 ◽  
pp. 2341-2344
Author(s):  
Mohammad Saeed Masoomi ◽  
Siti Aminah Osman ◽  
Ali Jahanshahi
Keyword(s):  
Ground Motion ◽  
Base Isolation ◽  
Time History ◽  
Steel Structure ◽  
Steel Structures ◽  
Steel Frame ◽  
Nonlinear Time History Analysis ◽  
Seismic Load ◽  
Vector Method ◽  
Seismic Ground Motion

This paper presents the performance of base-isolated steel structures under the seismic load. The main goals of this study are to evaluate the effectiveness of base isolation systems for steel structures against earthquake loads; to verify the modal analysis of steel frame compared with the hand calculation results; and development of a simulating method for base-isolated structure’s responses. Two models were considered in this study, one a steel structure with base-isolated and the other without base-isolated system. The nonlinear time-history analysis of both structures under El Centro 1940 seismic ground motion was used based on finite element method through SAP2000. The mentioned frames were analyzed by Eigenvalue method for linear analysis and Ritz-vector method for nonlinear analysis. Simulation results were presented as time-acceleration graphs for each story, period and frequency of both structures for the first three modes.

scholarly journals Experimental study on fatigue performance of Q420qD high-performance steel cross joint in complex environment

2021 ◽  
Author(s):  
Haigen Cheng ◽  
Cong Hu ◽  
Yong Jiang
Keyword(s):  
Fatigue Life ◽  
High Performance ◽  
Steel Structure ◽  
Steel Structures ◽  
Fatigue Tests ◽  
Fatigue Performance ◽  
Corrosive Media ◽  
Joint Connection ◽  
High Performance Steel ◽  
The Cross

AbstractThe steel structure under the action of alternating load for a long time is prone to fatigue failure and affects the safety of the engineering structure. For steel structures in complex environments such as corrosive media and fires, the remaining fatigue life is more difficult to predict theoretically. To this end, the article carried out fatigue tests on Q420qD high-performance steel cross joints under three different working conditions, established a 95% survival rate $$S{ - }N$$ S - N curves, and analyzed the effects of corrosive media and high fire temperatures on its fatigue performance. And refer to the current specifications to evaluate its fatigue performance. The results show that the fatigue performance of the cross joint connection is reduced under the influence of corrosive medium, and the fatigue performance of the cross joint connection is improved under the high temperature of fire. When the number of cycles is more than 200,000 times, the design curves of EN code, GBJ code, and GB code can better predict the fatigue life of cross joints without treatment, only corrosion treatment, and corrosion and fire treatment, and all have sufficient safety reserve.

scholarly journals A New Approach for Cylindrical Steel Structure Deformation Monitoring by Dense Point Clouds

2021 ◽  
Vol 13 (12) ◽  
pp. 2263
Author(s):  
Dongfeng Jia ◽  
Weiping Zhang ◽  
Yuhao Wang ◽  
Yanping Liu
Keyword(s):  
Steel Structure ◽  
Steel Structures ◽  
Point Clouds ◽  
Deformation Monitoring ◽  
Deformation Analysis ◽  
Relative Deformation ◽  
Structure Deformation ◽  
Single Time ◽  
Cylindrical Steel ◽  
Cylinder Fitting

As fundamental load-bearing parts, the cylindrical steel structures of transmission towers relate to the stability of the main structures in terms of topological relation and performance. Therefore, the periodic monitoring of a cylindrical steel structure is necessary to maintain the safety and stability of existing structures in energy transmission. Most studies on deformation analysis are still focused on the process of identifying discrepancies in the state of a structure by observing it at different times, yet relative deformation analysis based on the data acquired in single time has not been investigated effectively. In this study, the piecewise cylinder fitting method is presented to fit the point clouds collected at a single time to compute the relative inclination of a cylindrical steel structure. The standard deviation is adopted as a measure to evaluate the degree of structure deformation. Meanwhile, the inclination rate of each section is compared with the conventional method on the basis of the piecewise cylinder fitting parameters. The validity and accuracy of the algorithm are verified by real transmission tower point cloud data. Experimental results show that the piecewise cylinder fitting algorithm proposed in this research can meet the accuracy requirements of cylindrical steel structure deformation analysis and has high application value in the field of structure deformation monitoring.

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