Study on flexural performance of bamboo braced beam-column joints
As a new type of green and environmentally friendly building material,bamboo has been widely used in con-structions.The joint connection of bamboo components is an important issue that needs to be considered in the promo-tion of bamboo structures.The research on the connection properties of bamboo in China has started in the early years,but the research progresses was slow,and the current bamboo structure design joint is not perfect in regarding the con-struction form and design method of joints.Traditional methods of joining bamboo structures include binding joints,mortise and tenon joints and bolted joints.However,these bamboo joints all have different problems in practical appli-cations.In order to enrich the connection methods of the original bamboo structure,it is desired to improve the assem-bly efficiency of the bamboo joints and explore the stiffness and bearing capacity of beam column joints under different construction forms.This study designed three types of bamboo braced beam column connection joints,being named as simple steel clamp joint J1,passing through bolt joint J2,and self-tapping screw joint J3 according to different con-nection methods.Each joint was designed with three sets of specimens according to different original bamboo grades.Through monotonic loading tests,the bending mechanical properties and failure characteristics of the joints were inves-tigated,and the bending moment-angle curves of the joints with three different construction forms were obtained.Based on the variation characteristics of the bending moment-angle curve of the joint during the loading process,a tri-pline model was proposed to fit its segmented stiffness parameter values.The semi-rigidity degree of joints was veri-fied by applying the European Code of Steel Construction joint type discriminant method.The results indicated that the through bolt joint J2 and the simple steel clamp joint J1 belonged to semi-rigid joint.The self-tapping screw joint J3 belonged to the hinge joint.The original bamboo grade was not sensitive to the bending performance of simple steel clamp joint J1 and self-tapping screw joint J3.The impact on the bending performance of the through bolt joint J2 was significant,and the collaborative work performance with connectors was optimal when the joint level was T8.The re-sults of this study can provide a theoretical basis for the application of modern bamboo structures.
original bamboo jointbraced beam columnbending resistancesemi-rigidload bearing capacity
国家科技期刊平台
NSTL
万方数据
维普
