The Experimental Investigation And Theoretical Analysis Of Bond Properties Of Ceramic Reconstituted Bamboo-reinforced Concrete

Policies in green building and energy conservation of construction are carried out,modernization of construction industrybecomesa important objectives of the development of industry. Due to the advantages includingstandardization of design and production,and assemble rapidly on the scene, the system of steel structure becomes the most suitable choice for assembly building.The maintenance system of panels is the bottleneck of restricting its development, the composite panel of bamboo reinforced ceramsite concrete will have a broad prospect with advantages of environment friendly, lightweight, heat insulationperformance and etc.The performance of anchorage between bamboo and reinforced concrete is the foundation for mutual work. In this paper, a orthogonal test of L16(45)and a singlefactor test were designed, and 48 specimens were drawed in the former, besides 75 specimens in the latter.The influence of concrete strength, bond length, tensile strength and cross section of bamboowas studied in orthogonal experiment,and the influence of bond length and cross section of bamboo, the level, type and curing periodof concrete considered in single-factor test.Damage phenomenon observed, failure mechanism analyzed,correlation was researched under the influence of various factors.Experiment study found that the cross section size of bamboo is of the key factor, besidesthe concrete strength and the initial bond length influence significantly,the tensile strength of bamboo reinforcement materials had minimal impact.Two failure modes was recorded including bamboo fracture and pulled out. The bond-slip curve include six stages:contact, strength rise paragraphs, springback stage, stable stage, descent stage and residual stage.Different stage is composed of different cohesive force, the stagesof slip are also different;The bond stength will be higher with a smaller section size of bamboo reinforcement, besides a the longer anchorage length and a higher grade of concrete strength.In this paper, a constitutive relation model of bond-slip between bamboo and reinforced concrete was presented, the model was verified feasibly by experimental data of pull-out tests.The formula of bonding strength and anchorage length was derived using references on achievement of steel bars and FRP. Application advice of design provides a basis for the promation of bamboo reinforced concrete.Research shows the result of constitutive relation model matches well with the data of pull-out tests, the formula is scientific and reasonable. Results provide reference for designers, is of great significance to the development of new building materials.