【作者】 郭小农； 陈宇； 柳献； 蒋首超； 罗亦洲；

【Author】 Guo Xiaonong;Chen Yu;Liu Xian;Jiang Shouchao;Luo Yizhou;Department of Structural Engineering, Tongji University;

【机构】 同济大学土木工程学院；

【摘要】 高强砂浆抗压强度高、耐腐蚀性好,是土木工程领域的传统材料;铝合金材料因其轻质、高强和易加工等优点已广泛应用于结构领域;碳纤维增强复合材料(CFRP)因其抗拉强度高、耐高低温和耐腐蚀等优点广泛应用于结构加固领域,本文综合考虑上述材料的特性,研发了一种新型组合构件——即在铝合金薄壁管外部包裹碳纤维布并在内部灌注高强砂浆而形成的高强铝合金组合构件。本文完成了共计16个铝合金空腔构件、外裹碳纤维布铝合金空腔构件和高强铝合金组合构件的受弯承载力试验,得到了其破坏模式、极限荷载以及弯矩-挠度曲线,并对试验结果进行了详细分析。试验结果表明,高强铝合金组合构件能充分发挥铝合金、高强砂浆和碳纤维布的材料强度,同时具备一定的变形能力和延性,其轻质高强、耐腐蚀、施工方便等优点使其在地下结构快速加固方面具有广阔的应用前景。更多还原

【Abstract】 High-strength mortar has high compressive strength and corrosion resistance, which is a traditional material in civil engineering. Aluminum alloy has been widely used in structure because of its advantages of lightweight, high-strength and corrosion resistance. Carbon fiber reinforced polymer(CFRP) has been used in the field of structural reinforcement due to its high tensile strength, extreme temperature resistance and corrosion resistance. An innovative high-strength aluminum alloy composite tube: the aluminum alloy tube with high strength mortar inside and CFRP sheet wrapped outside was developed by considering the advantages of aluminum alloy and CFRP comprehensively. Bending capacity experiments of 16 aluminum alloy cavity tubes, aluminum alloy cavity tubes with CFRP sheet wrapped and aluminum alloy composite tubes were completed. The failure mode, bending capacity and moment-deflection curve of specimens were analyzed. The experiments revealed that the property of aluminum alloy,high-strength mortar and CFRP can be fully exerted in high-strength aluminum alloy composite tube which can be widely used in rapid repair and reinforce of underground structures.更多还原