Damage index analysis of prefabricated segmental bridge columns under cyclic loading

Abstract

The damage index is usually applied to evaluate the damage states of bridge structures, which is the basis of structural fragility study. The present study investigates the seismic damage index of the prefabricated segmental bridge columns (PSBC) under cyclic loading by theoretical and numerical analysis. Based on the previous pseudo-static experiments, different damage states characteristics of the monolithic cast-in-place bridge columns (MCBC) and the PSBC are discussed and analyzed to propose the limit-state capacities for each damage state of the PSBC. The limit-state capacities include four parameters: compressive strain of concrete, the tensile strain of steel, the prestress level and the residual displacement. Two finite element models of the PSBC are developed by OpenSees to carry on numerical analysis. Using the numerical results, the damage indexes for the PSBCs are obtained based on the limit-state capacities obtained above. The results indicate that the numerical results show good agreement with the experimental results of the bridge columns. The damage index formula of the PSBC, derived in this study, is reasonable and can be further applied. The maximum error between the proposed damage index and that obtained in the verified case is 20.3%. The proposed method in this paper for developing the damage index of the PSBC can be used in the seismic vulnerability analysis assessment of the bridge structures with prefabricated segmental columns.

Seismic performance analysis of self-centering segment piers with mortise-tenon shear connectors based on cyclic pseudo-static test

“…The prefabricated bridge components such as beams and piers were applied to the actual bridge engineering, attribute to the advantages such as the standardized construction and maintenance, the low carbon emission and environmental pollution, and the much fewer site occupation as well [1][2][3]. Mainly in the form of precast box girder, precast pier, precast caisson foundation, etc.…”

Interface Debonding Detection of Precast Segmental Concrete Beams (PSCBs) Using Piezoceramic Transducer‐Based Active Sensing Approach

“…Precast segmental concrete beams (PSCBs) are widely applied to civil engineering [1][2][3][4]. Compared with the monolithic cast-in-place beams, the PSCBs have advantages of easy transportation, speedy construction, low environmental impact, easy quality assurance, and strong self-resetting ability [4]. erefore, the development of PSCBs is an irresistible trend.…”

Propuesta metodológica de evaluación de capacidad de carga de tableros de puentes en voladizos sucesivos apoyados en pruebas de carga

“…(b) Columnas segmentarias prefabricadas. Fuente: (Zhai & Zhang, 2018) (TECHINST S.A.S., 2015d). ........................................................................................................................................ Figura 20.…”

“…Análisis del índice de daño de columnas de puentes segmentados prefabricados bajo carga cíclica El índice de daño se aplica generalmente para evaluar el estado de daño de las estructuras de puentes, que constituye la base del estudio de fragilidad estructural. En este artículo elaborado por (Zhai & Zhang, 2018) se discuten y analizan diferentes características del estado de daño de las columnas monolíticas del puente fundidas en sitio en comparación con las columnas segmentarias prefabricadas para proponer las capacidades de estado límite para cada estado de daño, al igual de examinar el índice de daño sísmico de columnas segmentarias prefabricadas bajo carga cíclica, por medio de la realización de pruebas cuasi estáticas que proponen la capacidad en el estado límite. La investigación sobre las columnas de puente fundidas monolíticamente bajo carga cíclica se concentra principalmente en la región de la rótula plástica.…”

“…Los datos obtenidos indican que los resultados numéricos presentan una buena concordancia con los resultados experimentales de las columnas del puente. (Zhai & Zhang, 2018). Las columnas de los pilares de las estructuras de los puentes se dañan con más facilidad por los efectos producidos por los terremotos.…”