Seismic design challenges: investigating bending moments, shear actions, and design parameters in RC walls according to the second generation of Eurocode 8

IF 4.1 2区工程技术 Q2 ENGINEERING, GEOLOGICAL

Bulletin of Earthquake Engineering Pub Date : 2025-08-07 DOI:10.1007/s10518-025-02245-3

Helder Maranhão, Humberto Varum, José Melo

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引用次数: 0

Abstract

The ongoing revision of Eurocode 8 includes updates encompassing new ductility classifications, limits on damage control, conditions for local ductility, and corresponding detailing guidelines. It is crucial to thoroughly examine and compare these revisions with the existing provisions of Eurocode 8. The present research examines structural behaviour factors (q) for varying strut inclination angles (45° and 22°) and compares them against prEN 1998-1-2:2023 recommendations. Findings reveal consistent overperformance, highlighting the conservative estimations for structural redundancy offered by prEN 1998-1-2:2023. Plastic hinge lengths obtained through nonlinear analysis and FprEN 1998-1-1:2024 calculations are compared, showcasing conservative estimations prioritising safety. Observations indicate distinct trends in tension shift (a_l) and critical height (h_cr) compared to plastic hinge length (l_pl), aligning with conservative approaches outlined in EN 1998–1:2004 and prEN 1998-1-2:2023. Additionally, the observed shear magnification factors (ɛ) may indicate a potential overestimation of shear forces attributed to the amplified effect of higher modes in the inelastic range combined with flexural overstrength.

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抗震设计挑战：根据第二代欧洲规范8，研究RC墙的弯矩、剪切作用和设计参数

正在进行的欧洲规范8的修订包括更新，包括新的延性分类，损害控制的限制，局部延性条件，以及相应的详细指南。彻底检查这些修订并将其与欧洲法典第8号的现有规定进行比较至关重要。本研究考察了不同支柱倾角（45°和22°）的结构行为因素(q)，并将其与prEN 1998-1-2:2023建议进行了比较。研究结果显示了一致的优异表现，突出了prEN 1998-1-2:2023提供的结构冗余的保守估计。通过非线性分析得到的塑性铰长度与FprEN 1998-1-1:2024计算结果进行了比较，表明保守估计优先考虑了安全性。观察结果表明，与塑性铰链长度（lpl）相比，张力位移（al）和临界高度（hcr）有明显的趋势，与EN 1998-1:2004和prEN 1998- 1:20 23中概述的保守方法一致。此外，观察到的剪切放大系数（）可能表明，由于非弹性范围内高阶模态的放大效应和弯曲超强，可能会对剪切力进行潜在的高估。

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

Bulletin of Earthquake Engineering 工程技术-地球科学综合

CiteScore

8.90

自引率

19.60%

发文量

263

审稿时长

7.5 months

期刊介绍： Bulletin of Earthquake Engineering presents original, peer-reviewed papers on research related to the broad spectrum of earthquake engineering. The journal offers a forum for presentation and discussion of such matters as European damaging earthquakes, new developments in earthquake regulations, and national policies applied after major seismic events, including strengthening of existing buildings. Coverage includes seismic hazard studies and methods for mitigation of risk; earthquake source mechanism and strong motion characterization and their use for engineering applications; geological and geotechnical site conditions under earthquake excitations; cyclic behavior of soils; analysis and design of earth structures and foundations under seismic conditions; zonation and microzonation methodologies; earthquake scenarios and vulnerability assessments; earthquake codes and improvements, and much more. This is the Official Publication of the European Association for Earthquake Engineering.