新型复合竹层积材的顺纹销槽承压强度计算公式  

Calculation Formula for Dowel Bearing Strength Parallel to Grain in New-type Engineered Bamboo Products

作　　者：李霞镇[1] 钟永[1,2] 任海青[1,2] 

机构地区：[1]中国林业科学研究院木工所,北京100091 [2]国家林业局木材科学与技术重点实验室,北京100091

出　　处：《土木建筑与环境工程》2013年第S1期4-8,共5页Journal of Civil,Architectural & Environment Engineering

基　　金：林业公益性行业科研专项(201004005)

摘　　要：为探究新型复合竹层积材在木结构中的实际应用性,填补其顺纹销槽承压强度计算公式,共进行了7组28个竹层积材顺纹销槽承压试件的测试,分析了竹层积厚度、端距和销直径等因素对竹层积材销槽承压的刚度、最大载荷和强度等力学性能的影响。研究表明:竹层积材厚度对承压强度的影响可忽略不计;当端距不小于64mm时,端距对承压强度的影响亦可忽略不计;承压强度随销直径的增加,大致呈线性递减。通过回归拟合的销直径影响系数,建立竹层积材顺纹销槽承压强度的理论计算公式,且理论计算结果与实测结果吻合良好。For exploring the practicality of engineered bamboo products in timber structure,the formula of dowel bearing strength parallel to the grain was investigated.In this paper,seven groups of twenty eight specimens were tested.The effect of the thickness of engineered bamboo products,end distance and pin diameter on the maximum load,stiffness and dowel bearing strength were analyzed.It was showed the thickness of engineered bamboo products had no effect on the dowel bearing strength.The effect of end distance on the dowel bearing strength could be negligible with the end distance greater than 64mm.And the dowel bearing strength approximately linear improved with the decrease of pin diameter.The influence coefficient of pin diameter was obtained by regression analysis.Finally,a simplified theoretical calculation formula of dowel bearing strength was establishment.And the results of dowel bearing strength by the theoretical calculation formula had a good agreement with those obtained by test.

关 键 词：复合竹层积材 木结构 顺纹销槽承压强度 理论计算公式 

分 类 号：TU366.3[建筑科学—结构工程]