Reliability Evaluation of Structures Excited by Earthquakes in Time Domain Using a Novel Concept | Chapter 3 | Science and Technology: Developments and Applications Vol. 3

A novel reliability evaluation method for structures excited by the seismic loading applied in the time domain is presented. Major sources of nonlinearity and uncertainty are incorporated into the algorithm. Structures are represented by finite elements. To demonstrate that the algorithm will work in different computational platforms, the stress-based finite element is used. Connections are more realistically considered partially restrained (PR) with different rigidities. Multiple site-specific design earthquake acceleration time histories are numerically generated using information on the seismic activities of the region using the broadband platform (BBP) available at the Southern California Earthquake Center (SCEC). The reliability of structures is estimated by exciting them with real and artificially generated earthquake time histories. The accuracy of the method is verified using Monte Carlo Simulation. With the help of examples, it is demonstrated that the proposed reliability concept is efficient and accurate. The procedure can extract the reliability information with the help of a few hundred deterministic analyses instead of millions needed for simulation and users can use any computer available to them. Post-Northridge PR beam-to-column connections are superior to the pre-Northridge FR connections. Structural reliabilities are estimated for the overall lateral deflection and inter-story drift limit states. Inter-story drifts are more critical than the overall lateral deflections. The Performance-Based Seismic Design (PBSD) guidelines are briefly discussed. The reliability method fills a knowledge gap and helps to implement the PBSD concept. Currently, the authors call the method REDSET (Reliability Evaluation of Dynamic Systems Excited in Time Domain). REDSET appears to be an exciting development replacing the classical random vibration concept and providing an alternative to the simulation approach.

 

Author (s) Details

 

J. Ramon Gaxiola-Camacho
Department of Civil Engineering, Autonomous University of Sinaloa, Culiacan, Sinaloa, México.

 

Achintya Haldar
Department of Civil Engineering and Engineering Mechanics, University of Arizona, Tucson, Arizona, USA and Indian Institute of Technology (IIT) – Delhi, India

 

Aaron Gutierrez-Lopez
Department of Civil Engineering, Autonomous University of Sinaloa, Culiacan, Sinaloa, México.

 

Please see the book here:- https://doi.org/10.9734/bpi/stda/v3/4011

Multistate Reliability Evaluation of Communication Networks via Multi-Valued Karnaugh Maps and Exhaustive Search | Chapter 10 | Advanced Aspects of Engineering Research Vol. 1

 The reliability of two-terminal multistate flow networks is evaluated using two simple (yet useful) methods in this chapter. The Variable-Entered Karnaugh Map (VEKM) and the Multi-Valued Karnaugh Map (MVKM) are the two Karnaugh map variants used in these two methods (MVKM). These two versions are critical in providing not only the visual perspective needed to write better future applications, but also adequate verification tools. We compare these two types of map methods to the exhaustive search method, which ensures conceptual consistency at the cost of computational performance. Our goal is to assess the probability mass function (pmf) in a variety of situations, including flow from a source node to a sink node in a capacitated network with a multistate capacity model for the ties. Each network connection has a different capacity, which is thought to be mutually exclusive. The system's ability to successfully transmit at least a certain necessary system flow from the source (transmitter) to the sink (receiver) station is entirely dependent on its reliability. In order to achieve all successful states, the max-flow min-cut theorem is crucial. Two demonstrative examples with sufficient descriptions are given to illustrate the applicability of the proposed methods. In terms of pseudo-Boolean functions, the special case of a binary flow network is also considered.

Author (s) Details

Ali Muhammad Ali Rushdi
Department of Electrical and Computer Engineering, Faculty of Engineering, King Abdulaziz University, P.O.Box 80200, Jeddah, 21589, Saudi Arabia.

Omar Mutab Alsalami
Department of Electrical Engineering, Faculty of Engineering, Taif University, Taif, Kingdom of Saudi Arabia.

View Book :- https://stm.bookpi.org/AAER-V1/article/view/336