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作者:

Liang, Jiongfeng (Liang, Jiongfeng.) | Zou, Wanjie (Zou, Wanjie.) | Wang, Caisen (Wang, Caisen.) | Li, Wei (Li, Wei.)

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EI Scopus SCIE

摘要:

This paper is engaged in the study of a partially encased steel-concrete composite beam with web opening (PECBWO). PECBWO refers to a web opening in a wide flange H-beam or I-beam and then filling the web with concrete, with the concrete remaining equally cellular. This specimen is superior to conventional cellular beams and partially encased concrete beams (PECB), saving on casting formwork and structural self-weight. This test focuses on the flexural performance of the PECBWOs. The parameters of the PECBWOs studied are concrete strength, opening shape, opening ratio, and thickness of the bottom flange of the steel. For this purpose, seven PECBWOs were designed for flexural tests and one solid web partially encased beam (PEB) was used as a control group. The analysis of the damage pattern, load-deflection, strain distribution, bearing capacity and ductility of the eight specimens subjected to bending was carried out by obtaining load-displacement curves and strain data of the section steel through test practice. The results show that the PECBWO with 14.9 % opening ratio and circular openings have the excellent performance, with cracking load and flexural capacity similar to that of solid web PEB, and possess better seismic performance with 41.6 % increase in ductility. In addition the bottom flange of the steel is equivalent to the tensile reinforcement of the reinforced concrete beam, and the reduction of the thickness of the bottom flange significantly reduces the flexural capacity and ductility of the PECBWO. For the same case, the specimen with C50 has a higher crack load. An analytical model for flexural load bearing capacity was also provided.

关键词:

Ultimate bearing capacity Partially encased steel-concrete composite Flexural performance Discount factors beams Web opening

作者机构:

  • [ 1 ] [Liang, Jiongfeng]East China Univ Technol, Fac Civil & Architecture Engn, Nanchang, Peoples R China
  • [ 2 ] [Wang, Caisen]East China Univ Technol, Fac Civil & Architecture Engn, Nanchang, Peoples R China
  • [ 3 ] [Liang, Jiongfeng]Guangxi Univ, Guangxi Key Lab Disaster Prevent & Engn Safety, Nanning, Peoples R China
  • [ 4 ] [Zou, Wanjie]Guangxi Univ Sci & Technol, Coll Civil & Architecture Engn, Liuzhou, Peoples R China
  • [ 5 ] [Wang, Caisen]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing, Peoples R China
  • [ 6 ] [Li, Wei]Wenzhou Univ, Coll Civil & Architecture Engn, Wenzhou, Peoples R China

通讯作者信息:

  • [Li, Wei]Wenzhou Univ, Coll Civil & Architecture Engn, Wenzhou, Peoples R China;;

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来源 :

STRUCTURES

ISSN: 2352-0124

年份: 2024

卷: 64

4 . 1 0 0

JCR@2022

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SCOPUS被引频次: 4

ESI高被引论文在榜: 0 展开所有

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