Influencia del suelo blando en la vibraciones mecánicas en puente peatonales de Bogotá D.C

Abstract

In recent decades, the analysis of the dynamic response of pedestrian bridges has acquired increasing importance in structural engineering. Bridges, as crucial elements of infrastructure, must be designed to withstand not only static loads but also dynamic loads generated by pedestrians during their daily use. One of the key considerations is the soil-structure interaction (SSI), which refers to the influence resulting from the inertial interaction between the bridge structure and the properties of the soil on which it is built. This study focuses on the evaluation of the dynamic response of 3 pedestrian bridges in Bogotá considering the SSI on soft soils (SSI-SS) that make up the north-central geology of the City. To achieve this, the SAP2000 structural analysis software was used, with which detailed numerical simulations were carried out using SSI methodologies called impedance functions and direct analysis method for three types of dynamic loads. typical pedestrians. The main objective was to investigate how SSI in soft soil affects the properties and dynamic response of bridges to different pedestrian loads, in terms of fundamental frequencies, accelerations and displacements. This study points out that, for the sample structures, the SSI in the soft soils of the sample has a direct influence on the dynamic response and modifies the characteristics of the mode shapes without considering the SSI; This influence has greater relevance for the first modes of vibration.