Leixin Nie , Lizhong Jiang , Wangbao Zhou , Zhiyong Jiang , Yulin Feng , Zhipeng Lai
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引用次数: 0
Abstract
Rocking piers are increasingly recognized as a viable seismic isolation strategy for bridges. Compared to highway bridges, railway bridges are subjected to more stringent requirements for post-seismic functional recovery due to the elevated operational standards of train travel. Conventional rocking piers, however, encounter significant challenges. This study presents a rocking pier system specifically designed for railway bridges, with its feasibility confirmed through quasi-static testing. The test results demonstrate that incorporating rocking resilient hinges (RRHs) at the rocking interface enhances the rotational stability of the piers. The RRHs and horizontal limiting devices provide the pier with a nearly constant center of rotation during the rocking phase. This configuration effectively mitigates the inaccuracies typically associated with predicting the compressed area height of conventional rocking interfaces, significantly enhancing the predictive accuracy of the piers' behavior during and after earthquakes. An enlarged steel plate mounted on the top surface of the RRH assists in stress distribution, effectively preventing localized concrete damage and reducing repair costs following seismic events. In addition, the system's replaceable external energy dissipation devices facilitate rapid post-earthquake recovery. By embedding continuous unbonded prestressed tendons within the pier and coordinating with an enlarged base, the rocking interface remains closed under normal operational conditions or during frequent earthquakes, ensuring uninterrupted train functionality. The system's 'locking' mechanism is a final safeguard, fulfilling critical life safety objectives.
期刊介绍:
Engineering Structures provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. Particularly welcome are contributions dealing with applications of structural engineering and mechanics principles in all areas of technology. The journal aspires to a broad and integrated coverage of the effects of dynamic loadings and of the modelling techniques whereby the structural response to these loadings may be computed.
The scope of Engineering Structures encompasses, but is not restricted to, the following areas: infrastructure engineering; earthquake engineering; structure-fluid-soil interaction; wind engineering; fire engineering; blast engineering; structural reliability/stability; life assessment/integrity; structural health monitoring; multi-hazard engineering; structural dynamics; optimization; expert systems; experimental modelling; performance-based design; multiscale analysis; value engineering.
Topics of interest include: tall buildings; innovative structures; environmentally responsive structures; bridges; stadiums; commercial and public buildings; transmission towers; television and telecommunication masts; foldable structures; cooling towers; plates and shells; suspension structures; protective structures; smart structures; nuclear reactors; dams; pressure vessels; pipelines; tunnels.
Engineering Structures also publishes review articles, short communications and discussions, book reviews, and a diary on international events related to any aspect of structural engineering.