全玻幕墙玻璃肋支承结构面内受弯加固试验研究

对9片简支玻璃肋结构面内受弯的全过程试验进行研究,其中3片采用粘贴钢化玻璃片的方法加固,3片采用粘贴不锈钢片的方法加固。对比分析玻璃肋采用不同方法加固后的破坏形态和受力特点。结果表明,玻璃肋结构无论是否进行过加固,其P-Δ曲线均呈线性,且其破坏形态为明显的脆性破坏。采用粘贴钢化玻璃片和采用粘贴不锈钢片的方法对玻璃肋结构进行加固,均可以显著提高玻璃肋结构的受弯承载能力,同时结构的变形能力也有一定程度的提高。玻璃肋在受弯时,其截面应变符合平截面假定,但加固玻璃肋结构中,后粘贴的玻璃片或钢片存在显著的应变滞后问题,在设计中应予以考虑。

TEST ＆ ANALYSIS OF IN-PLANE FLEXURAL BEHAVIORS OF STRENGTHENED GLASS RIBS FOR ALL-GLASS CURTAIN WALL

Nine simply supported glass ribs are tested under in-plane bending, among which, three ribs are strengthened with tempered glass sheets and three ribs are strengthened with stainless steel sheets. The failure modes and the mechanical behaviors of the ribs are compared and analyzed. It can be found that the P - △ curves of the ribs are always linear and brittle failures usually occur, no matter if they are strengthened or not. The flexural capacity and the deformability of the rib can be effectively improved if the rib is strengthened using tempered glass or stainless steel. The strained section of the ribs remains plane but the strain lag will occur in the tempered glass sheets or the stainless steel sheets, which should be considered in the design of the strengthened glass rib.