CAJ | 학술논문

选择胶合竹为研究对象，以双组分环氧树脂为胶黏剂，采用拉—拉荷载模式开展胶合植筋连接抗拔性能研究。主要探讨了边距、胶层厚度以及长径比等对植筋连接抗拔强度的影响。结果表明：边距对植筋连接抗拔强度有一定影响，边距过小导致胶合竹开裂，抗拔强度下降，推荐边距应大于4d（植筋杆直径）；胶层厚度对植筋抗拔强度影响不显著；长径比是影响植筋连接抗拔强度的重要因子，抗拔强度随长径比的增大而增大，并存在一个临界植入深度使得抗拔强度等于植筋杆屈服强度。胶合竹与胶黏剂粘接界面名义剪切强度随长径比的增大而减小。根据长径比给出植筋抗拔强度预测方程。试验过程中主要产生胶合竹开裂、植筋杆拔出和植筋杆屈服3种破坏模式。
선택효합죽위연구대상，이쌍조분배양수지위효점제，채용랍—랍하재모식개전효합식근련접항발성능연구。주요탐토료변거、효층후도이급장경비등대식근련접항발강도적영향。결과표명：변거대식근련접항발강도유일정영향，변거과소도치효합죽개렬，항발강도하강，추천변거응대우4d（식근간직경）；효층후도대식근항발강도영향불현저；장경비시영향식근련접항발강도적중요인자，항발강도수장경비적증대이증대，병존재일개림계식입심도사득항발강도등우식근간굴복강도。효합죽여효점제점접계면명의전절강도수장경비적증대이감소。근거장경비급출식근항발강도예측방정。시험과정중주요산생효합죽개렬、식근간발출화식근간굴복3충파배모식。
With structural glued laminated bamboo as study object, we used two-component epoxy to study the pull-out strength of glued in rod, and tested the specimens in pull-pull configuration.We also studied the influence of edge distances, glue thickness and the slenderness ratio on pull-out strength.The edge distances had certain effect on pull-out strength, the pull-out strength was decreased when the edge distance was too small;because the glulam was cracking in this case, the recommended edge distances was 4d ( d is the rod diameter ) .The glue thickness had insignificant effect on pull-out strength.The slenderness ratio has an important effect on pull-out strength.The pull-out strength was increased with the slenderness ratio increasing, and there was a critical embedded depth making the pull-out strength of glued-in rod equal to the yield strength of the steel rod.The nominal shear strength of glulam/adhesive was decreased with slenderness ratio in-creasing.We got the mean pull-out strength of a single axially loaded rod set parallel to the grain.The main failure modes were glulam cracking, shear failure along the rod and yielding of the rod.