【摘要】 为研究通过肋柱连接内外叶板的混凝土夹芯保温墙板的抗弯性能,探究肋柱间距对墙板抗弯性能的影响,采用集中力四分点加载方式对3个不同肋柱间距的混凝土带肋夹芯墙板进行静力试验。试验研究表明:肋柱间距超过有效翼缘宽度的1.67倍后,墙板的受弯破坏模式仍为弯曲破坏,内外叶混凝土板间没有发生剪切变形,墙板的组合性能较好;3个试件的极限荷载分别为82.46、74.45、60.95kN,达到自重的6.51～8.80倍,具有较高的安全性能;极限状态下的跨中挠度为48.00、38.95、40.09mm,达到屈服状态的4.19～4.31倍,表现出较好的弯曲变形能力;墙板受弯工作时受剪滞效应影响明显,应力集中于混凝土肋柱区域,肋柱间距增大200mm和600mm,墙板试件抗弯承载能力分别下降了9.71%和26.09%,对墙板的抗弯承载能力影响显著。更多还原

【Abstract】 In order to study the flexural performance of concrete sandwich insulation wall panels connected to inner and outer blades by ribbed columns and explore the influence of ribbed column spacing on the flexural performance of wall panels, static tests were carried out on three concrete wall panels with ribbed sandwich cores with different ribbed column spacing by using the four-point loading method of concentrated force. The experimental results show that when the space between rib-columns exceeds 1.67 times of the effective flange width, the bending failure mode of the wall panels is still the bending failure mode, and no shear deformation occurs between the inner and outer blades of the concrete slabs, and the combined performance of the wall panels is better. The ultimate load of the three specimens is 82.46, 74.45 and 60.95 k N respectively, which reaches 6.51～8.80 times of the dead weight, and has high safety performance. In the limit state, the mid-span deflection is 48.00, 38.95 and 40.09 mm, which is 4.19～4.31 times of the yield state, showing a good bending deformation ability. The shear lag effect has a significant influence on the flexural capacity of wallboard, and the stress is concentrated in the concrete rib-column area. When the space between rib-column increases by 200 mm and 600 mm, the flexural bearing capacity of wallboard specimens decreases by 9.71% and 26.09%, respectively, which has a significant influence on the flexural bearing capacity of wallboard.更多还原