METHOD TO DETERMINE MAXIMAL DEFLECTION OF SINGLE COMPOSITE TIMBER BEAMS WITH ENLARGING JOINTS

摘要

FIELD: construction, particularly dynamic control of composite timber structure rigidity. ^ SUBSTANCE: method involves fastening beam to test desk supports, exciting transversal oscillations in the beam on main or the first resonance frequency; measuring above frequency and determining maximal beam deflection caused by uniformly distributed load applied thereto. Several beams having the same cross-sections with gradually decreasing bending stiffness ratio between joint and integral cross-section are produced. Resonance frequency of unloaded beam state oscillation and maximal static deflection caused by uniformly distributed load are determined for each beam. After that reference dependence between maximal deflection and main or the first resonance oscillation frequency is plotted. To determine maximal deflection of beam having unknown joint stiffness main or the first resonance frequency of unloaded beam oscillation is determined. Maximal deflection magnitude is calculated with the use of said reference dependence. ^ EFFECT: extended technological capabilities. ^ 2 dwg