The investigation on flexural performance of prestressed concrete-encased high strength steel beams

IF 17.7 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-03-29 DOI:10.24425/ace.2024.148919

Jun Wang, Yurong Jiao, Menglin Cui, Wendong Yang, Xueqi Fang, Jun Yan

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引用次数: 1

Abstract

This paper reports an experimental on the flexural performance of prestressed concrete-encased high-strength steel beams (PCEHSSBs). To study the applicability of high-strength steel (HSS) in prestressed concrete-encased steel beams (PCESBs), one simply supported prestressed concrete-encased ordinarystrength steel beam (PCEOSSB) and eight simply supported PCEHSSBs were tested under a four-point bending load. The influence of steel strength grade, I-steel ratio, reinforcement ratio and stirrup ratio on the flexural performance of such members was investigated. The test results show that increasing the I-steel grade and I-steel ratio can significantly improve the bearing capacity of PCESB. Increasing the compressive reinforcement ratio of PCEHSSB can effectively improve its bearing capacity and ductility properties, making full use of the performance of HSS in composite beams. Increasing the hoop ratio has a small improvement on the load capacity of the test beams; setting up shear connectors can improve the ductile properties of the specimens although it does not lead to a significant increase in the load capacity of the combined beams. Then, combined with the test data, the comprehensive reinforcement index considering the location of reinforcement was proposed to evaluate the crack resistance of specimens. The relationship between the comprehensive reinforcement index and the crack resistance of specimens was given.

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预应力混凝土包裹高强度钢梁的抗弯性能研究

本文报告了预应力混凝土包裹高强度钢梁（PCEHSSBs）的抗弯性能实验。为了研究高强度钢（HSS）在预应力混凝土包裹钢梁（PCESBs）中的适用性，在四点弯曲荷载作用下，对一根简支预应力混凝土包裹普通强度钢梁（PCEOSSB）和八根简支 PCEHSSBs 进行了试验。研究了钢强度等级、工钢比、配筋率和箍筋率对此类构件抗弯性能的影响。试验结果表明，提高工字钢等级和工字钢比率可显著提高 PCESB 的承载能力。提高 PCEHSSB 的抗压配筋率可有效改善其承载能力和延性性能，充分发挥高速钢在复合梁中的性能。增加箍筋比对试验梁的承载力有小幅改善；设置剪力连接件虽然不能显著提高组合梁的承载力，但可以改善试件的延性性能。然后，结合试验数据，提出了考虑配筋位置的综合配筋指数来评估试件的抗裂性。给出了综合配筋指数与试件抗裂性之间的关系。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.