摘要
目的分析比较几种胶合木材料,研究竹楠木拉、抗压基本力学性能,给出基于木材强度设计值的计算方法为基础的竹楠木拉压强度设计值建议值.方法按照《木材物理力学性能试验方法》和《木材无疵小试样的试验方法》对竹楠木材顺纹抗拉和抗压进行试验研究,测得竹楠木顺纹抗拉、抗压强度.结果试验结果表明竹楠木抗压经历了弹性、弹塑性和破坏3个阶段,发生塑性破坏;抗拉经历了较长的弹性阶段后发生脆性破坏.试验得到竹楠木顺纹抗拉强度可达98.1 MPa,顺纹抗压强度可达73.3 MPa.结论竹楠木顺纹强度具有离散性,抗拉强度的离散性要高于其抗压强度.竹楠木胶合竹材能够满足建筑结构对材料抗拉压力学性能的要求,试验结果对竹楠木的合理利用和深入研究提供理论依据.
The fundamental mechanical properties of tension and compression for bamboo nanmu were studied. The recommended strength design values were given based on the strength design calculation method of timber. Tests for tensile and compressive strength parallel to grain of bamboo Nammu were carded out, according to relevant timber codes, ＇Wood physical and mechanical properties test method＇ （GB1927 -1943 -1991 ）and ＇ Standard test methods for small clear specimens of timber＇ （ASTM D143 -94 （2007） ）. Experimental results show that the compression parallel to grain passes through elastic, elastic-plastic and plastic failure phase. But after a long elastic stage of tensile tests, the brittle failure occurs. The tensile strength parallel to grain is up to 98. 1 MPa, and the compressive strength reaches to 73.3 MPa. Conclusion is that there are dispersions of strength parallel to grain. The tensile strength dispersion is higher than the compressive strength. The Bamboo nanmu can meet requirements for the material mechanics performance of building structures. The obtained experimental results provide a theoretical basis for rational application and further research of bamboo nanmu.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2015年第2期236-243,共8页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51378265)
关键词
竹楠木
顺纹抗压强度
顺纹抗拉强度
力学性质
bamboo nanmu
compressive strength parallel to grain
tensile strength parallel to grain
mechanical property
