Research on the formula for buckling coefficient of Moso bamboo column
He Ziqi1, 2 Zhong Ziqin1 Zhou Xuhong1, 2 Xiao Sa1
1. School of Civil Engineering, Chongqing University, Chongqing 400045, China;
2. Key Laboratory of New Technology for Construction of Cities in Mountain Area of the Ministry of Education, Chongqing University, Chongqing 400045, China
Abstract：In order to obtain a more accurate buckling coefficient formula for the Moso bamboo column in Sichuan area, the compressive strength parallel to the grain and the critical load of 31 bamboo columns with a relatively uniform distribution of slenderness ratio were measured by the experiment, and 9 formulas for the buckling coefficient of bamboo column at home and abroad were studied. The results show that the average compressive strength parallel to the grain of this batch of bamboo is about 51 MPa. The failure of the bamboo columns is due to the superposition of local bulging and overall flexural deformation, which eventually causes the bamboo column tube wall to exceed the limit value of the tensile strength perpendicular to the grain and crack longitudinally. The bamboo columns are collapsed due to the interaction of the elastic compression and the longitudinal plastic crack induced by the local buckling behavior of the bamboo tube. The larger the slenderness ratio, the more obvious the lateral deflection, and the damage degree of local plastic cracking in the bamboo column with larger slenderness is more evident. The differences in the critical loads calculated by the existing formulae for the buckling coefficient of bamboo column can be observed, and these predicted critical loads differ from the measured critical load to some degree. Finally, using the Ylinen method with good degree of fitting, a formula for buckling coefficient of bamboo column applicable to Sichuan is proposed based on the test data.
何子奇 钟紫勤 周绪红 肖洒. 毛竹压杆屈曲系数公式研究[J]. 土木工程学报, 2022, 55(6): 26-35.
He Ziqi Zhong Ziqin Zhou Xuhong Xiao Sa. Research on the formula for buckling coefficient of Moso bamboo column. 土木工程学报, 2022, 55(6): 26-35.
