Behavior of large-scale connections between circular concrete-filled steel tubular columns and H-section steel beams

Author:

Yang Yuanlong12ORCID,Liu Xianggang12,Zhang Jun12ORCID,Liu Jiepeng12,Cheng Wei3

Affiliation:

1. Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education, Chongqing University, Chongqing, China

2. Department of Civil Engineering, Chongqing University, Chongqing, China

3. China HuanQiu Contracting & Engineering Corporation (Guangzhou), Guangzhou, China

Abstract

Three large-scale connections between circular concrete-filled steel tubular columns and H-section steel beams were tested. The specimens include one connection with T-shaped stiffeners under static load and two connections, respectively, with T-shaped stiffeners and diaphragms (including interior and exterior diaphragms) under cyclic loads. During the test, the experimental phenomena were observed. The static properties of strength and ductility are calculated for static connection based on load–displacement curves, while the seismic properties of strength, ductility, and energy dissipation are analyzed for seismic connections based on hysteretic load–displacement curves. Combining experimental phenomena, mechanical properties, and stress development, the beam-hinge failure mode can be identified for all specimens. The measured beam strengths of specimens are compared with those predicted by the current AISC-360, EC4, and GB 50017-2017 codes. The study results show that all connections are reliable. A finite element model, established and verified with the experimental results, is used to perform parametric analysis. Furthermore, design suggestions of T-shaped stiffeners and diaphragms are proposed based on a parametric analysis.

Funder

national natural science foundation of china

National Key Research and Development Program of China

Publisher

SAGE Publications

Subject

Building and Construction,Civil and Structural Engineering

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