Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Seismic assessment and parametric analysis on a multi-level aseismic simply-supported bridge with cable-restraining composite rubber bearings and dissipative controlled rocking piers
https://orcid.org/0000-0001-9100-6624
https://orcid.org/0000-0001-9867-414X
Abstract Recent earthquakes uncovered the potential risk of widely-used simply-supported bridges (SSBs) to suffer severe bearing and pier damage, which may not be mitigated efficiently by only enhancing one of these components. Hence, this study proposes a novel multi-level aseismic bridge system (MLABS) comprising cable-restraining composite rubber bearings (CRCRBs) and dissipative controlled rocking (DCR) piers to make improvements at the system level. Deterministic and fragility analyses are conducted to compare the seismic performance of the novel system with that of the other three reference ones. Then, an economy analysis is carried out to evaluate economic efficiency. Finally, the effects of four main influential factors are investigated. The results reveal that the novel MLABS is capable of controlling the response of each vulnerable component within an acceptable range so that it can possess a large seismic capacity and a low system fragility. The economy superiority is also proved by the lowest expected losses under the concerned events and the minimum life-cycle cost. The internal sliding area ratio of the bearings is positively related to the performance and the economy, while the optimal design free displacement of the cables is about 140 mm. The pier capacity can be weakened by increasing the initial prestressing force or the energy-dissipating bar area in this case, which reduces the effectiveness and economy in improving the structural performance.
Highlights A novel multi-level aseismic simply-support bridge is proposed and assessed. Deterministic and fragility analyses are conducted to evaluate the performance. Economy is assessed by the losses under concerned events and the life-cycle cost. Effects of four influential factors on both performance and economy are studied.
Seismic assessment and parametric analysis on a multi-level aseismic simply-supported bridge with cable-restraining composite rubber bearings and dissipative controlled rocking piers
https://orcid.org/0000-0001-9100-6624
https://orcid.org/0000-0001-9867-414X
Abstract Recent earthquakes uncovered the potential risk of widely-used simply-supported bridges (SSBs) to suffer severe bearing and pier damage, which may not be mitigated efficiently by only enhancing one of these components. Hence, this study proposes a novel multi-level aseismic bridge system (MLABS) comprising cable-restraining composite rubber bearings (CRCRBs) and dissipative controlled rocking (DCR) piers to make improvements at the system level. Deterministic and fragility analyses are conducted to compare the seismic performance of the novel system with that of the other three reference ones. Then, an economy analysis is carried out to evaluate economic efficiency. Finally, the effects of four main influential factors are investigated. The results reveal that the novel MLABS is capable of controlling the response of each vulnerable component within an acceptable range so that it can possess a large seismic capacity and a low system fragility. The economy superiority is also proved by the lowest expected losses under the concerned events and the minimum life-cycle cost. The internal sliding area ratio of the bearings is positively related to the performance and the economy, while the optimal design free displacement of the cables is about 140 mm. The pier capacity can be weakened by increasing the initial prestressing force or the energy-dissipating bar area in this case, which reduces the effectiveness and economy in improving the structural performance.
Highlights A novel multi-level aseismic simply-support bridge is proposed and assessed. Deterministic and fragility analyses are conducted to evaluate the performance. Economy is assessed by the losses under concerned events and the life-cycle cost. Effects of four influential factors on both performance and economy are studied.
Seismic assessment and parametric analysis on a multi-level aseismic simply-supported bridge with cable-restraining composite rubber bearings and dissipative controlled rocking piers
https://orcid.org/0000-0001-9100-6624
https://orcid.org/0000-0001-9867-414X
Abstract Recent earthquakes uncovered the potential risk of widely-used simply-supported bridges (SSBs) to suffer severe bearing and pier damage, which may not be mitigated efficiently by only enhancing one of these components. Hence, this study proposes a novel multi-level aseismic bridge system (MLABS) comprising cable-restraining composite rubber bearings (CRCRBs) and dissipative controlled rocking (DCR) piers to make improvements at the system level. Deterministic and fragility analyses are conducted to compare the seismic performance of the novel system with that of the other three reference ones. Then, an economy analysis is carried out to evaluate economic efficiency. Finally, the effects of four main influential factors are investigated. The results reveal that the novel MLABS is capable of controlling the response of each vulnerable component within an acceptable range so that it can possess a large seismic capacity and a low system fragility. The economy superiority is also proved by the lowest expected losses under the concerned events and the minimum life-cycle cost. The internal sliding area ratio of the bearings is positively related to the performance and the economy, while the optimal design free displacement of the cables is about 140 mm. The pier capacity can be weakened by increasing the initial prestressing force or the energy-dissipating bar area in this case, which reduces the effectiveness and economy in improving the structural performance.
Highlights A novel multi-level aseismic simply-support bridge is proposed and assessed. Deterministic and fragility analyses are conducted to evaluate the performance. Economy is assessed by the losses under concerned events and the life-cycle cost. Effects of four influential factors on both performance and economy are studied.
Seismic assessment and parametric analysis on a multi-level aseismic simply-supported bridge with cable-restraining composite rubber bearings and dissipative controlled rocking piers
Zhong, Haiqiang (Autor:in) / Guo, Junjun (Autor:in) / Yuan, Wancheng (Autor:in) / Wang, Zhiqiang (Autor:in) / Dang, Xinzhi (Autor:in) / Deng, Xiaowei (Autor:in)
22.11.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Aseismic assessment of bridge piers
| British Library Conference Proceedings | 1998
| British Library Online Contents | 2008
Dynamic seismic response of controlled rocking bridge steel-truss piers
| Online Contents | 2008
Dynamic seismic response of controlled rocking bridge steel-truss piers
| Online Contents | 2008