Seismic Model Parameter Optimization for Building Structures

Abstract

Structural dynamic modeling is a key element in the analysis of building behavior for different environmental factors. Having this in mind, the authors propose a simple nonlinear model for studying the behavior of buildings in the case of earthquakes. Structural analysis is a key component of seismic design and evaluation. It began more than 100 years ago when seismic regulations adopted static analyzes with lateral loads of about 10% of the weight of the structure. Due to the dynamics and non-linear response of the structures, advanced analytical procedures were implemented over time. The authors’ approach is the following: having a nonlinear dynamic model (in this case, a multi-segment inverted pendulum on a cart with mass-spring-damper rotational joints) and at least two datasets of a building, the parameters of the building’s model are estimated using optimization algorithms: Particle Swarm Optimization (PSO) and Differential Evolution (DE). Not having much expertise on structural modeling, the present paper is focused on two aspects: the proposed model’s performance and the optimization algorithms performance. Results show that among these algorithms, the DE algorithm outperformed its counterpart in most situations. As for the model, the results show us that it performs well in prediction scenarios.

Optimization of the Dynamic Parameters of an Object in a Mathematical Model of Seismo-Acoustic Monitoring of Natural and Engineering Objects

“…The method of examining the response of a structure to a dynamic load is analyzed, which can be any: environmental (wind, sea waves, traffic, and so on) or artificially caused by testing impulses. For the creation model of a seismic signal, we took into account the fundamental empirical research of seismic signals, and mathematical models were used for their approximation [1,2]. Also, we used the streaming nature of the seismic process and considered that the seismic signal must be a wave, as was noticed in [3].…”

Multipoint Wave Measurement in Tuned Liquid Damper Using Laser Doppler Vibrometer and Stepwise Rotating Galvanometer Scanner

“…Energy dissipation technology has been developed to install auxiliary mass dampers to improve the performance of flexible buildings sensitive to earthquake loads and wind [1,2]. A tuned mass damper (TMD) is a mechanical device that consists of a spring mass system.…”