Restoring force model of square tubular columns filled with extra‐high‐performance reactive powder concrete

IF 1.8 3区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY Structural Design of Tall and Special Buildings Pub Date : 2022-06-18 DOI:10.1002/tal.1973

Wenxiu Hao, Xing Wei, Wanli Yu, R. Jiang, Xiao Xu

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Abstract

Square tubular column filled with extra‐high‐performance reactive powder concrete (RPC) is a novel composite structure that takes advantage of strong bending resistance of steel tubes and high compressive strength and toughness of RPC. To study the seismic performance of square tubular columns filled with RPC, a series of low‐cycle lateral loading tests were performed on four square tubular columns filled with RPC. The steel content and steel fiber content were selected as test parameters. Experimental results show that a higher steel content and 1% steel fiber result in good energy dissipation and deformation performance of specimens. To establish the restoring force model of square tubular columns filled with RPC, 18 column models with different steel content, axial compression ratio, and slenderness ratio were simulated and analyzed using ABAQUS. The simulation results show that a larger steel content and smaller slenderness ratio can improve the column bearing capacity, but the influence of axial compression ratio is negligible. A restoring force model considering stiffness degradation is proposed using a regression analysis method, which is in good agreement with the experimental results.

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超高性能活性粉末混凝土填充方管柱的恢复力模型

超高性能活性粉末混凝土（RPC）方钢管柱是一种新型的复合结构，它利用了钢管的强抗弯性和RPC的高抗压强度和韧性。为了研究RPC填充方管柱的抗震性能，对四根RPC填充方管柱进行了一系列低周侧向荷载试验。选择钢含量和钢纤维含量作为试验参数。试验结果表明，较高的钢含量和1%的钢纤维使试件具有良好的耗能和变形性能。为了建立RPC填充方钢管柱的恢复力模型，使用ABAQUS对18个不同含钢量、轴压比和长细比的柱模型进行了模拟分析。仿真结果表明，较大的含钢量和较小的长细比可以提高柱的承载力，但轴压比的影响可以忽略不计。采用回归分析方法建立了考虑刚度退化的恢复力模型，与实验结果吻合较好。

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来源期刊

Structural Design of Tall and Special Buildings 工程技术-工程：土木

CiteScore

5.30

自引率

4.20%

发文量

审稿时长

6-12 weeks

期刊介绍： The Structural Design of Tall and Special Buildings provides structural engineers and contractors with a detailed written presentation of innovative structural engineering and construction practices for tall and special buildings. It also presents applied research on new materials or analysis methods that can directly benefit structural engineers involved in the design of tall and special buildings. The editor''s policy is to maintain a reasonable balance between papers from design engineers and from research workers so that the Journal will be useful to both groups. The problems in this field and their solutions are international in character and require a knowledge of several traditional disciplines and the Journal will reflect this. The main subject of the Journal is the structural design and construction of tall and special buildings. The basic definition of a tall building, in the context of the Journal audience, is a structure that is equal to or greater than 50 meters (165 feet) in height, or 14 stories or greater. A special building is one with unique architectural or structural characteristics. However, manuscripts dealing with chimneys, water towers, silos, cooling towers, and pools will generally not be considered for review. The journal will present papers on new innovative structural systems, materials and methods of analysis.