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首页> 外文会议>6th International conference on advanced composite materials in bridges and structures 2012 >UPGRADING THE SEISMIC PERFORMANCE OF REINFORCED CONCRETE MASONRY COLUMNS USING CFRP AND GFRP WRAPS
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UPGRADING THE SEISMIC PERFORMANCE OF REINFORCED CONCRETE MASONRY COLUMNS USING CFRP AND GFRP WRAPS

机译：CFRP和GFRP增强钢筋混凝土砌体柱的抗震性能。

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摘要

Existing reinforced masonry structures would have reinforced concrete masonry (RCM) columns that are part of the structure's seismic force resisting system. Compared to reinforced concrete columns; few experimental studies have addressed the behaviour of rectangular masonry columns under combined axial and cyclic loads. Wrapping susceptible RCM columns with carbon fibre-reinforced polymers (CFRP) or glass fibre-reinforced polymers (GFRP) is expected to enhance their seismic behaviour, yet physical tests need to be conducted to quantify this enhancement. This paper focuses on assessing the seismic performance of RCM columns wrapped with CFRP and GFRP sheets. In this experimental study, seven 1.4 m reinforced masonry columns were constructed and tested when subjected to constant axial force and cyclic lateral excitations. The columns have a cross-section of 390 mm×390 mm and were constructed using bull-nosed concrete units. The first column had no FRP wraps and was used as a control specimen while three columns were wrapped with CFRP, and three columns were wrapped with GFRP using different layers of CFRP and GFRP sheets or different wrapping schemes. From the tests, the effects of CFRP and GFRP wraps in enhancing the seismic performance of the columns in terms of their ductility, and strength are discussed and compared.
机译：现有的钢筋砌体结构将具有钢筋混凝土砌体（RCM）柱，这是该结构抗震系统的一部分。与钢筋混凝土柱相比；很少有实验研究解决矩形砖石柱在轴向和循环荷载作用下的行为。用碳纤维增强聚合物（CFRP）或玻璃纤维增​​强聚合物（GFRP）包裹易受影响的RCM色谱柱有望增强其抗震性能，但仍需进行物理测试以量化这种增强。本文重点评估用CFRP和GFRP板包裹的RCM柱的抗震性能。在这项实验研究中，在恒定的轴向力和周期性的横向激励作用下，构造并测试了七个1.4 m钢筋砌体柱。立柱的横截面为390 mm×390 mm，并使用牛鼻混凝土单元构造。第一列没有FRP包裹层，并用作对照样品，而三列则由CFRP包裹，三列由GFRP包裹，使用不同的CFRP和GFRP板层或不同的包裹方案。从测试中，讨论并比较了CFRP和GFRP包裹材料在提高柱的延性和强度方面的抗震性能。

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