Research On The Theory Of Curved Surface Reinforcement Anchorage And Engineering Application

At present,most of the research on rebar-planting anchorage technology focuses on plane rebar-planting anchorage technology,and there are few studies on curved anchorage technology.This article uses theoretical derivation and numerical simulation methods to study the anchoring technology of curved surface planting bars,and verifies its effectiveness in engineering.A theoretical model of curved single bar anchorage has been established,and a formula for the ultimate bearing capacity has been derived.The formula for the ultimate bearing capacity of curved single bar anchorage is in good agreement with the calculated values of numerical simulation.Then,the influencing factors of single reinforcement anchoring on curved surfaces were analyzed,and the results showed that the ultimate bearing capacity increased with the increase of curved radius;The greater the depth of reinforcement planting,the greater the peak value of the load slip curve;The improvement of concrete strength grade has no significant effect on the improvement of bearing capacity;The ultimate bearing capacity increases with the increase of the thickness of the reinforcement adhesive.The theoretical model of curved group anchorage is established,and the formula of ultimate bearing capacity is derived.The formula of ultimate bearing capacity of curved group anchorage is in good agreement with the calculated value of numerical simulation.Then,the influencing factors of curved group reinforcement anchorage are analyzed.The results show that the ultimate bearing capacity decreases with the decrease of curved radius.The greater the depth of planting bar,the greater the peak value of load-slip curve;the thickness of the glue has little effect on the ultimate bearing capacity;with the increase of planting angle,the ultimate bearing capacity increases.The diameter of steel bar has little effect on the ultimate bearing capacity.When the steel bars are arranged in multiple rows,the planting spacing of 300 mm can exert the maximum bearing capacity of each row of steel bars.The practical engineering application of curved planting technology in ’ pile wall integration ’ structure is studied.The finite element model of high and low temperature conditions is established,and the influence of different factors on the structural strength under high and low temperature conditions is analyzed.The results show that under the two extreme temperature conditions,the 600 mm and 750 mm round pile radius used in the project have sufficient strength;under the low temperature condition,the concrete tensile and compressive limit value of the specimen decreases with the increase of the planting depth,and the structure is not affected by the planting depth under the high temperature condition.Under the condition of high and low temperature,the influence of the angle of planting bar on the tensile and compressive limit value of concrete is similar.When the angle of planting bar is 20°,the tensile and compressive limit value of concrete is the smallest.The finite element model of the ’ pile-wall-in-one ’ structure under earthquake action was established,and the damage of the seismic fortification intensity of 8 degrees and 9 degrees was analyzed.When the seismic fortification intensity was 9 degrees,the concrete construction side wall in the ’ pile-wall-in-one ’ structure did not reach the ultimate tensile strength of concrete,and the side wall of the structure did not offset and collapse.In this paper,the theoretical models of curved single bar anchorage and curved group bar anchorage are established,and the ultimate bearing capacity formula is derived.The numerical model is used to verify its correctness and prove its effectiveness in engineering application.