In this paper we address the problem of the fault detection and recovery in networks of agents with discrete time dynamics. In particular, we apply a fault detection and recovery approach, proposed for the standard li...
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Many long-span suspension bridges have been built throughout the world in recent years but they are often subject to multiple types of dynamic loads, especially those located in wind-prone regions and carrying both tr...
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Many long-span suspension bridges have been built throughout the world in recent years but they are often subject to multiple types of dynamic loads, especially those located in wind-prone regions and carrying both trains and road vehicles. To ensure the safety and functionality of these long-span steel suspension bridges, fatigue assessment and reliability shall be performed from time to time during their service life. In this regard, structural health monitoring systems (SHMS) have been installed in a few long-span suspension bridges, but it is not clear how to make use of SHMS for fatigue assessment and reliability analysis. This study focuses on fatigue assessment and reliability analysis of long-span suspension bridges under multiple types of dynamic loads by integrating computer simulation with the measurement data from SHMS and by taking the Tsing Ma suspension bridge in Hong Kong as an example. This study leads to a powerful framework and an engineering approach for determining dynamic stress responses of long-span suspension bridges under combined highway, railway and wind loadings. This study also narrows down the gap currently existing between structural health monitoring technologies and structural condition assessment practices by developing a few approaches capable of performing fatigue assessment and reliability analysis with taking into account uncertainty and randomness inherent in both physical field and computer simulation.
A numerical research with different turbulence models for shallow water equations was carried out. This was done in order to investigate which model has the ability to reproduce more accurately the wakes produced by t...
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Project cost control is the key and core of project management. Architectural design project budget is different from construction project budget. By analyzing the characteristics of architectural design project cost,...
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Project cost control is the key and core of project management. Architectural design project budget is different from construction project budget. By analyzing the characteristics of architectural design project cost, this paper proposes cost control of architectural design project from perspectives of organizational, technical and economic measures etc, in order to reduce cost and improve revenue.
In this paper we address the problem of the fault detection and recovery in networks of agents with discrete time dynamics. In particular, we apply a fault detection and recovery approach, proposed for the standard li...
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In this paper we address the problem of the fault detection and recovery in networks of agents with discrete time dynamics. In particular, we apply a fault detection and recovery approach, proposed for the standard linear consensus protocol, to a consensus algorithm that has been previously presented by the authors and is based on a triangular splitting of the iteration matrix of the standard consensus algorithm. Moreover, we show that for a particular topology of the communication graph the fault recovery strategy can be implemented by the agents in a fully decentralized and autonomous approach. An example describes how in the considered framework the fault recovery is implemented by each agent.
This paper presents the results of a simulation using physical objects. This concept integrates the physical dimensions of an entity such as length, width, and weight, with the usual process flow paradigm, recurrent i...
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Product lifecycle management (PLM) is a systematic, controlled concept for managing and developing products and product related information. The aim of the paper is contributing in the definition of a software tool su...
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Product lifecycle management (PLM) is a systematic, controlled concept for managing and developing products and product related information. The aim of the paper is contributing in the definition of a software tool suitable to tackle this important issue. In order to specify a simulation module that is the core of an integrated PLM platform, we analyze and describe by the Unified Modeling Language (UML) the processes that are relevant for the generic PLM concepts. Moreover, the UML activities diagrams are translated in a discrete event simulation model in order to quantitatively evaluate the performance of the PLM system and to detect possible blockings or bottlenecks. Finally, a simulation study illustrates the efficiency of the module and shows how it can help in the PLM application.
In this paper a general sensitivity-based gradient methodology developed to investigate the relation between seismic performance reduction and regularity of brace overstrength distributions is used for performance-bas...
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ISBN:
(纸本)9789609999427
In this paper a general sensitivity-based gradient methodology developed to investigate the relation between seismic performance reduction and regularity of brace overstrength distributions is used for performance-based design and assessment of braced steel frames. A range of variation of the brace over-strength is defined and the brace over-strength patterns that are the most unfavorable for each response parameter are identified. Then, the relationship between the brace over-strength used in the seismic design and the maximum seismic performance reduction is obtained. Results for a case study considering a realistic buckling-restrained braced frame are presented and discussed showing the practical use of the developed sensitivity-based gradient methodology.
RC beams shear-strengthened with externally bonded or near-surface mounted (NSM) FRP reinforcement usually fail by the debonding of FRP in a brittle manner. When the FRP reinforcement debonds, the internal steel stirr...
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