Experimental Study on Vertical Load Bearing Capacity of Wall Panel with Wood-frame Covered by Bamboo Strips
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摘要: 为研究木骨架正交斜放竹条覆面墙板的竖向承载能力，设计了3种覆面组合墙板试件（双面竹条，竹条-石膏板，层板-石膏板），每种墙板试件各3块，尺寸为1 200×1 200 mm。通过对试件进行竖向承载力试验，研究对比分析3种覆面组合墙板的破坏模式，荷载-变形曲线以及极限承载力。试验结果表明：墙体破坏初期，竹条覆面部分发生弯曲，层板与石膏板中部发生弯曲；继续加载，覆面与龙骨连接铁钉拔出，部分竹条失去与墙体连接，层板石膏板发生弯折破坏；最终，竖向龙骨整体失稳导致墙体破坏。层板-石膏板组合墙板竖向龙骨表现为墙板平面内失稳破坏，覆面为竹条的组合墙板竖向龙骨表现为墙板平面外失稳破坏。分析结果表明：正交斜放竹条覆面可提高试件竖向承载能力，且延性优于层板-石膏板覆面墙板试件。Abstract: In order to study the vertical load bearing capacity of wall panel with wood-framed covered by orthogonal oblique placement bamboo strips, three types of composite wall panels specimens, i.e. double-sided bamboo strips, bamboo strips-gypsum boards, and laminate-gypsum boards, were tested to investigate the failure forms, load-deformation curves, and ultimate bearing capacities. The results showed that in the early stage of wall failure, the surface bamboo strips were bent, and the middle parts of the laminate board and the gypsum board were bent. With the load increasing, some nails connecting the laminate board and the gypsum board to the wood frame were pulled out, and some of the bamboo strips bent further. The wall panel damaged by the buckling of vertical keels in the end. The orthogonal placement bamboo strips improved the axial load carrying capacity of the specimen. The ductility of wall panel with bamboo strips was better than that of the laminate board and gypsum board covered wall panel specimen. This indicates that the wall panel with wood-frame covered by bamboo strips has potential engineering application value, and it is beneficial for subsequent theoretical analysis.
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