Research on Tensile Bearing Capacity of Self-drilling Screw Joints for Thick Faced Roof Sandwich Panels

摘要

To find out the connection of screw joints and base materials or the metal crest surface at the head of screw which is destroyed first, the tensile bearing capacity of joints between self-drilling screws (SDS) and the base materials were tested first. With two types of SDS joints furnished with C-saddle washers (C-SW) and M-saddle washers (M-SW) respectively, test and analysis on the tensile bearing capacity of SDS joints were undertaken. Corresponding finite element (FE) models were analyzed by ANSYS/LS-DYNA software. Based on mechanical analysis, a new theoretically computational formula for tensile bearing capacity of SDS joints is proposed.