Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Seismic Evaluation of Repaired Bridge Bent Using Dynamic Analysis
Seismic performance evaluation of a structurally deficient as-built reinforced concrete bridge bent and a comparison to a retrofitted bridge bent was conducted. The as-built bridge bent had deficient seismic details and was retrofitted with a carbon fiber-reinforced polymer (CFRP) donut, which included a CFRP shell, eight headed steel bars, nonshrink concrete, and a steel collar around the column; CFRP composite jackets were also employed to increase column shear capacity. Detailed design guidelines of the rehabilitation method by using a simplified strut-and-tie model (STM) were presented which could be applied to rehabilitate similar reinforced concrete bridges. A fiber-based model was developed in OpenSees; in addition, soil-structure interaction (SSI) was considered using simplified springs; the bridge bent model was validated using experimental results from previous research of an existing bridge. A comparison of the as-built and retrofitted bridge bents under nonlinear static pushover analysis, incremental dynamic analysis (IDA), and fragility analysis using 22 far-field ground motions, showed that the rehabilitation method improved the seismic performance in terms of load capacity and structural stiffness.
Seismic Evaluation of Repaired Bridge Bent Using Dynamic Analysis
Seismic performance evaluation of a structurally deficient as-built reinforced concrete bridge bent and a comparison to a retrofitted bridge bent was conducted. The as-built bridge bent had deficient seismic details and was retrofitted with a carbon fiber-reinforced polymer (CFRP) donut, which included a CFRP shell, eight headed steel bars, nonshrink concrete, and a steel collar around the column; CFRP composite jackets were also employed to increase column shear capacity. Detailed design guidelines of the rehabilitation method by using a simplified strut-and-tie model (STM) were presented which could be applied to rehabilitate similar reinforced concrete bridges. A fiber-based model was developed in OpenSees; in addition, soil-structure interaction (SSI) was considered using simplified springs; the bridge bent model was validated using experimental results from previous research of an existing bridge. A comparison of the as-built and retrofitted bridge bents under nonlinear static pushover analysis, incremental dynamic analysis (IDA), and fragility analysis using 22 far-field ground motions, showed that the rehabilitation method improved the seismic performance in terms of load capacity and structural stiffness.
Seismic Evaluation of Repaired Bridge Bent Using Dynamic Analysis
Wu, Ruo-Yang (Autor:in) / Pantelides, Chris P. (Autor:in)
Structures Congress 2020 ; 2020 ; St. Louis, Missouri (Conference Cancelled)
Structures Congress 2020 ; 144-161
02.04.2020
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Seismic Evaluation of Repaired Bridge Bent Using Dynamic Analysis
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