NON-LINEAR ANALYSIS OF BRIDGE STRUCTURES
Abstract
For the health tracking of civil infrastructures, it is essential to determine the non-linear behaviour connected to structural damage. For the precise assessment of these types of non-linear behaviours, it is essential to evaluation of how these structures will function when exposed to specific earthquake movement. To determine the behaviour, non-linear static or non-linear time history analysis approach can be utilized, but the locally destroyed impact has to be also regarded. With the prominent impact of basic mode of non-linear static approach, non-linear time history evaluation approach is broadly utilized for the evaluation of complex non-linear behaviour with many degrees of freedom and with local damages. Non-linear time history analysis is generally performed by means of primary step-by-step integration. While this is a effective technique, its application to large structures is costly and may be occasionally prohibitively so. In perspective of these local non-linear consequences and high computational expense of the traditional step-by-step integration method, the application of the modal superposition approach prolonged to non-linear techniques or the element mode synthesis approach has been and remains to be an appealing concept. In this study, the non-linear time history evaluation method with some restricted higher modes accounting the impact of local damages is suggested. Specifically, some RC piers are presumed to be surpassed the yield capability throughout earthquakes and trigger large inelastic deformations and damage. To identify the seismic response extremely impacted by the hysteretic behaviour of destroyed RC piers, the modified Takeda model is presented. As a confirmation of effectiveness of suggested approach, the non-linear responses of damaged bridge structure are investigated among suggested approaches and above described traditional non-linear analysis approach.
Keywords
Nonlinear dynamics,hysterical model,modified Takeda model,modal order
Kaynakça
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