Advanced finite element method enhances earthquake impact assessment

Finite element model for seismic analysis of concrete dam soils. Source: International Journal of Mechanical System Dynamics (2024). DOI: 10.1002/msd2.12106

The design of structures such as dams, tunnels and bridges to withstand temporary loads from sources such as earthquakes, high-speed trains and explosions requires a robust analysis of the dynamic interaction between soil and structure. Conventional methods often fail to handle complex boundary conditions and dynamic responses.

The demand for accurate SSI solutions is increasing, especially considering the influence of local soil conditions on seismic motion characteristics. Given these challenges, in-depth research on advanced numerical methods is necessary to enhance the accuracy and reliability of SSI analysis.

Researchers from Kyoto University have presented a velocity-dependent finite element procedure in space and time in the International Journal of Mechanical System Dynamics. The study, published on June 4, 2024, provides a systematic approach to reduce unbounded soil domains and model energy flow during seismic activities, providing a major leap forward in dynamic SSI analysis.

The study presents a velocity-based spatial-temporal finite element method (v-ST/FEM) to address dynamic SSI problems. This novel method incorporates viscous boundary conditions based on the Lysmer-Kuhlemeyer model, effectively cutting the unbounded soil domain to prevent spurious reflections.

The v-ST/FEM method accurately simulates the seismic input motion as an effective nodal force vector in the numerical simulation, ensuring the energy flow from the far field to the computational domain.

The researchers validated this approach by comparing the seismic response of a concrete gravity dam on a flexible half-space with semi-discrete finite element method (FEM) results using the Newmark-β method. The v-ST/FEM method showed superior accuracy and stability in simulating long-term seismic motion, making it a reliable tool for future SSI analyses and improving the prediction of seismic performance of various structures.

“Our v-ST/FEM approach provides a more accurate and computationally efficient method for dynamic soil-structure interaction problems,” said Dr. Vikas Sharma, lead author of the study. “This advance is critical to developing infrastructure that can better withstand the forces of nature, ultimately protecting lives and property.”

The application of this research is far-reaching, especially for the design and evaluation of ground structures such as dams and bridges in seismic areas. By providing more accurate prediction of seismic soil amplification, v-ST/FEM technology can contribute to safer and more resilient infrastructure, potentially saving lives and reducing the economic impact of earthquakes.

For more information: Vikas Sharma et al, Space–time finite element method with domain reduction techniques for soil–structure interaction problems, International Journal of Mechanical System Dynamics (2024). DOI: 10.1002/msd2.12106

Provided by Transpread

Citation: Resilience Engineering: Advanced Finite Element Method Enhances Earthquake Impact Assessment (2024, July 17) Retrieved July 17, 2024 from https://techxplore.com/news/2024-07-resilience-advanced-finite-element-method.html

This document is subject to copyright. Apart from any fair dealing for private study or research purposes, no part of it may be reproduced without written permission. The content is provided for informational purposes only.

What Are The Main Benefits Of Comparing Car Insurance Quotes Online

LOS ANGELES, CA / ACCESSWIRE / June 24, 2020, / Compare-autoinsurance.Org has launched a new blog post that presents the main benefits of comparing multiple car insurance quotes. For more info and free online quotes, please visit https://compare-autoinsurance.Org/the-advantages-of-comparing-prices-with-car-insurance-quotes-online/ The modern society has numerous technological advantages. One important advantage is the speed at which information is sent and received. With the help of the internet, the shopping habits of many persons have drastically changed. The car insurance industry hasn't remained untouched by these changes. On the internet, drivers can compare insurance prices and find out which sellers have the best offers. View photos The advantages of comparing online car insurance quotes are the following: Online quotes can be obtained from anywhere and at any time. Unlike physical insurance agencies, websites don't have a specific schedule and they are available at any time. Drivers that have busy working schedules, can compare quotes from anywhere and at any time, even at midnight. Multiple choices. Almost all insurance providers, no matter if they are well-known brands or just local insurers, have an online presence. Online quotes will allow policyholders the chance to discover multiple insurance companies and check their prices. Drivers are no longer required to get quotes from just a few known insurance companies. Also, local and regional insurers can provide lower insurance rates for the same services. Accurate insurance estimates. Online quotes can only be accurate if the customers provide accurate and real info about their car models and driving history. Lying about past driving incidents can make the price estimates to be lower, but when dealing with an insurance company lying to them is useless. Usually, insurance companies will do research about a potential customer before granting him coverage. Online quotes can be sorted easily. Although drivers are recommended to not choose a policy just based on its price, drivers can easily sort quotes by insurance price. Using brokerage websites will allow drivers to get quotes from multiple insurers, thus making the comparison faster and easier. For additional info, money-saving tips, and free car insurance quotes, visit https://compare-autoinsurance.Org/ Compare-autoinsurance.Org is an online provider of life, home, health, and auto insurance quotes. This website is unique because it does not simply stick to one kind of insurance provider, but brings the clients the best deals from many different online insurance carriers. In this way, clients have access to offers from multiple carriers all in one place: this website. On this site, customers have access to quotes for insurance plans from various agencies, such as local or nationwide agencies, brand names insurance companies, etc. "Online quotes can easily help drivers obtain better car insurance deals. All they have to do is to complete an online form with accurate and real info, then compare prices", said Russell Rabichev, Marketing Director of Internet Marketing Company. CONTACT: Company Name: Internet Marketing CompanyPerson for contact Name: Gurgu CPhone Number: (818) 359-3898Email: [email protected]: https://compare-autoinsurance.Org/ SOURCE: Compare-autoinsurance.Org View source version on accesswire.Com:https://www.Accesswire.Com/595055/What-Are-The-Main-Benefits-Of-Comparing-Car-Insurance-Quotes-Online View photos