METHOD FOR ESTIMATING ALLOWABLE PULL-OUT STRENGTH OF ANCHOR MEMBER BURIED IN SHORT FIBER-REINFORCED CEMENT-BASED MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a method capable of accurately estimating allowable pull-out strength upon pulling out an anchor member with a large-diameter head part buried in a solidified short fiber-reinforced cement-based material.;SOLUTION: A value calculated by dividing an actual measurement maximum tension load P_t acquired in a pull-out test of an anchor member 1 buried in a solidified material 2 by an actual measurement tension strength _uσ_t acquired in a tension test of the solidified material 2, is substituted as an effective horizontal projection area A_e for an equation (2) to grasp an estimation breakage angle θ_e in advance based on a condition of the pull-out test, and when allowable pull-out strength P_e is estimated, an equation (1) for which the grasped estimation breakage angle θ_e is substituted is used: P_e=Φ×_uσ_t×A_e ... (1); A_e=π(L/tanθ_e){(L/tanθ_e)+D} ... (2), where Φ represents a reduction coefficient, L represents a buried length of the anchor member, and D represents a head part diameter of a large-diameter head part.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT