Seismic performance of a precast bridge pier with a novel externally assembled 3U energy dissipator (EA3UED): Experimental and analytical study

IF 4.6 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering Pub Date : 2025-08-25 DOI:10.1016/j.soildyn.2025.109726

Rashad Al-Shaebi , Ning Li , Mohammed Al-Haaj , Qahtan Al-Shami , Mohammed Amer , Ahmed Al-Olofi

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引用次数: 0

Abstract

Precast Bridge Piers (PBPs) face challenges such as insufficient energy dissipation, flexure-shear coupling with complex load transfer, reducing their seismic resilience. This study introduces a novel External Assembled 3U Energy Dissipator (EA3UED), designed to overcome these inherent limitations and enhance the seismic performance of PBPs. The EA3UED is attached using a unique steel band to the pier, comprising three U-shaped components of high-strength steel. It provides multi-directional resistance and allows for post-earthquake inspection and replacement, offering a cost-efficient and maintainable solution. Experimental tests were conducted to evaluate the effectiveness and compare the seismic performance of PBPs with and without EA3UEDs. Additionally, simplified analytical solutions were proposed to derive the initial, yield, and ultimate capacities, showing a good agreement with experimental data and proving effective for preliminary design and optimization. Results demonstrated that integrating the EA3UED on PBPs significantly enhances their seismic resilience. Compared to the conventional precast pier (P-NED), the EA3UED-equipped pier (P-EA3UED) exhibited improvements in lateral load capacity (28.03%), energy dissipation (86.88%), stiffness (30.0%), and residual displacement (64.54% reduction). The primary failure mode in P-EA3UED was yielding of the U-shaped component with less damage bottom column, while P-NED failed with severe damage in the lower column region. The EA3UED’s adaptable design suits both precast and new construction applications and offers a cost-effective solution, particularly in high seismic zones. The EA3UED integration on PBPs using the unique steel band improves seismic resilience without compromising constructability or cost-efficiency. This study confirms the EA3UED as a promising enhancement for seismic-resistant bridge design, contributing to safer and more resilient infrastructure.

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新型外接3U消能器预制桥墩抗震性能试验与分析研究

预制桥墩面临耗能不足、弯剪耦合和复杂荷载传递等问题，其抗震性能下降。本研究介绍了一种新型的外部组装3U能量耗散器（EA3UED），旨在克服这些固有限制，提高PBPs的抗震性能。EA3UED使用独特的钢带连接到桥墩上，由三个u型高强度钢组成。它提供了多向阻力，并允许震后检查和更换，提供了一个经济高效和可维护的解决方案。进行了实验测试，评估了带ea3ued和不带ea3ued的PBPs的有效性并比较了它们的抗震性能。此外，还提出了初始容量、屈服容量和极限容量的简化解析解，与实验数据吻合较好，对初步设计和优化是有效的。结果表明，将EA3UED集成到PBPs上可以显著提高其抗震能力。与传统预制墩（P-NED）相比，配置ea3ued的墩（P-EA3UED）在侧载能力（28.03%）、耗能（86.88%）、刚度（30.0%）和残余位移（64.54%）方面均有改善。P-EA3UED的主要破坏模式为底部柱损伤较小的u形构件屈服，而P-NED的破坏模式为下柱区域损伤严重。EA3UED的适应性设计适用于预制和新建筑应用，并提供了一种经济高效的解决方案，特别是在高地震带。EA3UED集成在pbp上，采用独特的钢带，在不影响施工性或成本效益的情况下提高了地震弹性。这项研究证实了EA3UED是抗震桥梁设计的一个有希望的增强，有助于更安全、更有弹性的基础设施。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Soil Dynamics and Earthquake Engineering 工程技术-地球科学综合

CiteScore

7.50

自引率

15.00%

发文量

446

审稿时长

8 months

期刊介绍： The journal aims to encourage and enhance the role of mechanics and other disciplines as they relate to earthquake engineering by providing opportunities for the publication of the work of applied mathematicians, engineers and other applied scientists involved in solving problems closely related to the field of earthquake engineering and geotechnical earthquake engineering. Emphasis is placed on new concepts and techniques, but case histories will also be published if they enhance the presentation and understanding of new technical concepts.