十字形PEC短柱偏压性能及承载力计算方法研究

李媛萍, 林启颖, 李国飞

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建筑钢结构进展 ›› 2025, Vol. 27 ›› Issue (06) : 74-84. DOI: 10.13969/j.jzgjgjz.20231211001

十字形PEC短柱偏压性能及承载力计算方法研究

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摘要

碳纤维拉索具有轻质和超高抗拉强度的优点,适用于建筑结构的受拉构件中,其应用的推广有助于推进建筑行业节能减排的进行。国内目前尚未出台关于碳纤维索结构设计方面的规范和标准,高强度、大吨位的碳纤维索在我国房屋建筑中尚无应用先例。为了推进碳纤维索的研究和应用,在美的全球创新园区项目中,局部应用了强度等级为2 800 MPa的高强度碳纤维平行筋索,其中规格为7×139拉索的破断荷载达14 991 kN。文章介绍了在项目中碳纤维索的力学性能和承载力的确定过程及碳纤维索结构的抗震计算和防连续倒塌计算。结合碳纤维索的高温力学性能和构造措施,文中提出了在确保建筑耐火极限的要求下碳纤维索及其锚具防火保护目标的确定,碳纤维索结构的耐火计算及构造实现。

Abstract

Carbon fiber reinforced polymer (CFRP)cables have lightweight and ultra-high tensile strength, making them an ideal material for tension members in building structures. Their application can help promote energy conservation and emission reduction in the construction industry. However, there are currently no design codes for CFRP cable structures in China, and no precedents for the application of high-strength heavy duty CFRP cables in China's building structures. In order to promote the research and application of CFRP cables, cables with a strength of 2 800 MPa were used in the project of the Midea Shanghai Innovation Campus. The breaking load of a 7×139 cable reached 14 991 kN. This paper introduces the mechanical properties and bearing capacity determination of CFRP cables in the project. The seismic calculation and the analysis of progressive collapse resistance are also introduced. Considering the high-temperature performance of CFRP cables and structural measures, this paper proposes the determination of the fire protection target of CFRP cables and their anchorages under building fire resistance requirements. The calculation method and structural implementation of the fire resistance of CFRP cable structures are proposed in this paper.

关键词

高强度碳纤维索 / 抗震计算 / 防连续倒塌计算 / 高温力学性能 / 防火设计

Key words

high-strength carbon fiber reinforced polymer (CFRP) cable / seismic calculation / analysis of progressive collapse resistance / high-temperature performance / fire resistance design

中图分类号

TU399

引用本文

导出引用
李明菲 , 邢佳宇. 高强度碳纤维索在上海美的全球创新园区项目中的设计和应用探索. 建筑钢结构进展. 2025, 27(06): 74-84 https://doi.org/10.13969/j.jzgjgjz.20231211001

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