东北林业大学学报
東北林業大學學報
동북임업대학학보
JOURNAL OF NORTHEAST FORESTRY UNIVERSITY
2014年
6期
83-85,89
,共4页
张丹%任文涵%陈复明%邓健超%王戈
張丹%任文涵%陳複明%鄧健超%王戈
장단%임문함%진복명%산건초%왕과
竹束单板层积材%搭接%对接%力学性能%加速老化试验
竹束單闆層積材%搭接%對接%力學性能%加速老化試驗
죽속단판층적재%탑접%대접%역학성능%가속노화시험
Bamboo bundle laminated veneer lumber%Lap joint%Butt joint%Mechanical properties%Accelerated ag-ing test
采用竹束单板纵向接长的工艺制造连续长度的竹束单板层积材,研究了对接和搭接两种单板接长方式对表层接长的竹束单板层积材力学性能及4循环加速老化耐久性能的影响。结果表明:接头置于受压侧时,板材的静曲强度表现为搭接优于对接;而置于受拉侧时,对接优于搭接;接长方式对板材的水平剪切强度无显著影响。耐久性测试结果表明:经过循环试验后,对照样及接长样的弯曲性能从大到小为对照样、搭接样、对接样,且三者静曲强度非线性曲线拟合结果符合Boltzmann模型,弹性模量符合ExpDec1模型。
採用竹束單闆縱嚮接長的工藝製造連續長度的竹束單闆層積材,研究瞭對接和搭接兩種單闆接長方式對錶層接長的竹束單闆層積材力學性能及4循環加速老化耐久性能的影響。結果錶明:接頭置于受壓側時,闆材的靜麯彊度錶現為搭接優于對接;而置于受拉側時,對接優于搭接;接長方式對闆材的水平剪切彊度無顯著影響。耐久性測試結果錶明:經過循環試驗後,對照樣及接長樣的彎麯性能從大到小為對照樣、搭接樣、對接樣,且三者靜麯彊度非線性麯線擬閤結果符閤Boltzmann模型,彈性模量符閤ExpDec1模型。
채용죽속단판종향접장적공예제조련속장도적죽속단판층적재,연구료대접화탑접량충단판접장방식대표층접장적죽속단판층적재역학성능급4순배가속노화내구성능적영향。결과표명:접두치우수압측시,판재적정곡강도표현위탑접우우대접;이치우수랍측시,대접우우탑접;접장방식대판재적수평전절강도무현저영향。내구성측시결과표명:경과순배시험후,대조양급접장양적만곡성능종대도소위대조양、탑접양、대접양,차삼자정곡강도비선성곡선의합결과부합Boltzmann모형,탄성모량부합ExpDec1모형。
Bamboo bundle veneer lengthening technology was explored to produce long-span bamboo bundle laminated veneer lumber (BLVL), and the effect of veneer-joint forms, such as butt joint and lap joint, on mechanical properties and dura-bility of BLVL after accelerated aging test was investigated .Test results show that the modulus of rupture ( MOR) of BLVL with lap joint are better than BLVL with butt joint, when the joint is on the compression side.However, BLVL with butt joint shows higher MOR, when the joint is on the tension side.Besides, the difference on horizontal shear strength of the non-jointed samples, butt joint samples and lap joint samples is not significant.The results of durability test show that after four cycles, non-jointed samples show the highest bending properties, followed by lap joint samples and butt joint samples. The nonlinear curve fitting results of MOR accords with Boltzmann model, and MOE accords with ExpDec1.