Mondaic Ltd.’s Post

COMPDYN 2025! I am very happy to announce that I will be co-organizing a minisymposium at the COMPDYN Conference 2025 with Roberto Tartaglia and Aldo Milone. Minisymposium 67: "Global and local behaviour of steel structures under seismic, fatigue and robustness actions" The proposed MS is devoted to collect new contributions on the behavior, design, testing and analysis of steel and steel-composite structures give particular attention to the joint performance. The main topic addressed by this MS will cover analytical, experimental, and numerical analyses of both traditional and innovative types of structures and joints under different conditions, such as seismic loading, fatigue, and robustness actions. Deadline for Abstract Submission: 15 November 2024 Deadline for submitting the Full Paper (optional): 14 March 2025 More information at the minisymposium page.   https://lnkd.in/dCGnQugn

Useful work from UWO-GVE a year ago, Sujan Adhikari Hadi Ghofrani Adebayo Oluwaseun Ojo, Sheri Molnar, Aamna Sirohey, and Mohammad Salsabili: Physics-Based Seismic Hazard Simulations and 3D Velocity Structure Models for Southwest British Columbia. Metropolitan Vancouver Seismic Microzonation Mapping Project The developed 3D seismic-layer- thickness and Vs models are queried at select MHVSR locations to provide 1D Vs-depth models to calculate theoretical SH- wave site amplification for validation with the measured horizontal-to-vertical (H/V) amplification. https://lnkd.in/g-6cVwDJ

The paper "Seismic response and capacity of inelastic acceleration-sensitive nonstructural elements subjected to building floor motions", authored by Prof. Gennaro Magliulo and me, has just been published in Volume 53, Issue 4 of Earthquake Engineering and Structural Dynamics. The paper is Open Access. The study investigates the seismic response of nonstructural elements modeled as inelastic systems and provides IDA curves, dynamic properties, fragilities, closed-form capacity criteria, and novel correlations among key parameters. I hope you may find it useful for research and applicative purposes! https://lnkd.in/d4J9R7qt

Hello community, Finally, after a long process, I am glad to announce the publication of our study regarding the evaluation of the velocity model developed by the USGS for the San Francisco Bay Area stimulating small local earthquakes. Beyond just a comparison, we defined an innovative methodology to quantify the epistemic uncertainty induced in a simulated wave field by propagating it through a given velocity model. Also, we analyzed key components of the inputs for our analysis that can be improved when simulating small earthquakes, such as the impact of adopting point-source representations or just double-couple shear dislocations. We will apply this methodology to the community velocity models developed by SCEC and adopted for the CyberShake simulations. The article can be found in the following link: https://lnkd.in/g-ZTiu-7 Cheers,

Feeling honoured to have completed my first #review of a technical paper on seismic response of MSE walls for the high-ranking #journal of Geotextiles and Geomembranes. #civilengineering #geotechnics #earthquake #seismic #academia

This paper (Open Access) was published today by the Journal of Earthquake Engineering and Structural Dynamics. Here I propose a methodology to minimally modify a ground motion time history to induce collapse in nonlinear single-degree-of-freedom systems. The metric used to characterize the modification is the Arias intensity. The methodology is presented as an alternative to incremental dynamic analysis (IDA) widely used in earthquake engineering.

Irregular survey designs are becoming increasingly common in 3D seismic surveys. This is a result of many factors, including the use of #compressivesensing to increase resolution and reduce cost. Environmental factors, and the need to reduce the survey footprint in order obtain access are also having an increasing impact on survey design. Traditional survey design metrics such as Fold, Minimum Offset and Mutual Coherence do not allow proper comparison of the imaging properties of competing survey geometries. To address this issue, David Monk at #ACTeQ has developed a new metric that allows comparison of compressive sensing and conventional geomtries. Adequately Constructed Time (ACT) is a measure of the minimum time at which an image can be reconstructed from a given source and receiver geometry. The example shown below illustrates application of ACT to a Middle East survey in sand dune terrain. ACT illustrates the impact of vibrator exclusion areas caused by steep slopes. This case history was presented at the SEG Next Generation Land and Shallow Water Acquisition workshop in Oman earlier this week. Additional case histories will be available at the #SEG #IMAGE convention in August. Algorithms to compute ACT are being made available by ACTeQ at no charge. For further information please contact Dave Ridyard. #EAGE #seismic #3D #geophysics #GSH

【Numerical Modelling of Sediment Particle Transportation on a Navigation Inlet Using the Particle Tracking Model (PTM)】 Full article: https://lnkd.in/eNaYxVUQ (Authored by Lloyd Ndlovu and Zaid Mustafa, from Jackson State University, USA.) On most navigational inlets, #dredging would be vital to reduce the quantity of sediments as well as contaminants and therefore, the importance of #particle_tracking cannot be overemphasized. This paper investigates particle transportation using a numerical model application approach to understand the final fate of #suspended_sediment particle masses due to a dredging operation in a navigational harbor inlet using #PTM (Particle Tracking Model), and simulates particle transportation at a navigational harbor called St Jerome Creek Inlet in Chesapeake Bay in Maryland. 

This is a helpful video illustrating in a simple way and in a span of seconds the construction of a response spectral curve for a selected critical damping ratio of a given ground motion.

Very interesting thoughts on Seismic design, which is the most underrated load case considered in any structural design.