Lateral stiffness and restoring force model of multi-cavity-column steel frame– SPSW structure

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-09-16 DOI:10.1016/j.tws.2025.114000

Yaqi Suo , Shenggang Fan , Runmin Ding

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引用次数: 0

Abstract

As a novel prefabricated steel structural system, the multi-cavity-column (MC-column) steel frame–steel plate shear wall (SPSW) structure combines the characteristics of both MC column and SPSW, offering advantages such as high lateral stiffness, flexible and variable steel column cross-sections, and a high degree of factory prefabrication. To accurately evaluate the seismic performance of this structure and achieve refined design, based on low cyclic loading tests, a refined finite element analysis model was established, and parametric analysis was conducted to examine the effects of key parameters on the structure's seismic performance. The results indicate that: width-to-height ratio of SPSW α_s and height-to-thickness ratio of SPSW λ_w exhibit a distinct coupling effect on the initial lateral stiffness and shear capacity of the structure, while axial compression ratio of MC column n_c and α_s show a certain coupling effect on the energy dissipation capacity; moreover, parameters n_c and α_s exert a more pronounced influence on the initial lateral stiffness and shear capacity, and parameter α_s has a more significant impact on the energy dissipation capacity. Building upon this research, considering structural deformation mechanisms and the interaction between the MC-column steel frame and the embedded SPSWs, theoretical formulas for the initial lateral stiffness and shear capacity of the structure were derived. Furthermore, by incorporating the effect of damage accumulation degradation and pinching, a restoring force model for the structure was developed. Subsequently, validation against experimental and finite element results demonstrated high accuracy for the theoretical formulas and the restoring force model.

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多腔柱钢框架- SPSW结构侧移刚度及恢复力模型

多腔柱（MC-column）钢框架-钢板剪力墙（SPSW）结构是一种新型的预制钢结构体系，它结合了MC柱和SPSW柱的特点，具有侧向刚度高、钢柱截面灵活多变、工厂预制程度高等优点。为准确评价该结构的抗震性能，实现精细化设计，在低循环荷载试验的基础上，建立了精细化有限元分析模型，并进行了参数化分析，考察了关键参数对结构抗震性能的影响。结果表明：SPSW αs的宽高比和SPSW λw的高厚比对结构的初始侧移刚度和抗剪能力具有明显的耦合效应，而MC柱nc的轴压比与αs对结构的耗能能力具有一定的耦合效应；参数nc和αs对初始侧移刚度和抗剪能力的影响更为显著，参数αs对耗能能力的影响更为显著。在此基础上，考虑结构变形机制以及mc柱钢框架与预埋spsw的相互作用，推导了结构初始侧移刚度和抗剪能力的理论公式。在此基础上，结合损伤累积退化和夹紧效应，建立了结构的恢复力模型。随后，通过实验和有限元结果验证了理论公式和恢复力模型具有较高的精度。

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

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.