【作者】 李亚； 胡翔； 薛伟辰；

【Author】 Li Ya;Hu Xiang;Xue Weichen;Department of Structural Engineering, Tongji University;

【机构】 同济大学建筑工程系；

【摘要】 传统阳台板中混凝土板和钢筋易形成冷(热)桥,是建筑节能的薄弱部位。玻璃纤维增强塑料(GFRP)具有良好的绝热性能、力学性能和耐久性能。基于GFRP材料的这一突出优点,本文提出了一种新型保温阳台板,即采用GFRP筋替代普通钢筋、阳台板主体结构连接处的混凝土板断开并设置夹心保温层。通过外伸板单调静力试验,对该新型阳台板在弯剪复合作用下的力学性能进行了研究,重点研究了其破坏形态、承载力和变形能力。研究表明:保温阳台板的破坏形态为受压侧GFRP筋剪压破坏,受拉侧混凝土出现横向受弯裂缝和沿GFRP筋的纵向裂缝;保温阳台板的极限承载力为23.8k N,达到荷载设计值的2.65倍;破坏时保温阳台板的挠跨比达到1/40,具有良好的变形能力。更多还原

【Abstract】 Traditional balcony slab is the weak part of energy efficiency for the high thermal conductivity of concrete and steel bars which are easy to cause thermal bridge. Owing to the good thermal insulation performance, mechanical property and durability of glass fiber reinforced polymer(GFRP), a new insulation balcony slab is developed in which GFRP bars are used instead of steel bars and insulation layer is set between balcony slab and main structure. This paper studies the mechanical property through test on extended end-slab with GFRP bars under monotonic loading. The test shows that the failure mode is compression-shear failure of compressive GFRP bars together with transverse flexural cracking and longitudinal cracking of concrete in tension zone. The ultimate capacity is 23.8kN, which is 2.65 times the design load. The deflection reaches 1/40 of the span in ultimate state, which shows a good deformability.更多还原