A Simplified Model for Hysteretic Nonlinear Dynamic Response Analysis of Concrete Covering Grouting

Abstract

Based on the fundamental conception of hysteretic systems random vibration, this paper presents a simplified model to analyze the hysteretic nonlinear dynamic response of concrete covering consolidation grouting. The proposed model aims at capturing the hysteretic characteristics of the concrete covering nonlinear behavior and revealing the importance of grouting pressure dynamic load affecting the concrete covering uplift behavior. To this end, the proposed approach considers the concrete covering as Bernoulli-Euler beam, and then incorporating the Bouc-Wen model, simulates the soil force on the concrete covering, the one that beneath the concrete covering can be considered as hysteresis spring and dashpot in parallel. According to the actual grouting parameters, amplitude-frequency response characteristics of concrete covering are discussed under different external load. A comparison of model calculation results and real-field experiments are used to evaluate the effectiveness of the presented method, the results show that the predictions of the model correspond with the measured values.

Keywords

• grouting; uplift behavior; nonlinear dynamic response; Bouc-Wen model; concrete covering