Method for detecting influence of adjustment of web member distance on carrying capacity of parallel chord wood trusses

• Main Authors: QIANG MINGLI, DU GUANBEN, HAN SHANYU, ZHAO ZIYU, QIANG JIAYI, DOU LING
• Format: Patent
• Language: Chinese; English
• Published: 30.08.2019
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention belongs to the technical field of parallel chord wood truss carrying capacity, in particular to a method for detecting influence of adjustment of web member distance on carrying capacityof parallel chord wood trusses. The method comprises the following steps: S1, analyzing and calculating the change range of the web member node distance between parallel chord wood trusses, the axialforce of chords and web members and the truss bending moment distribution rule, and assessing the possible damage mode and position to provide theoretical support for the truss form design and carrying capacity test; S4, measuring the lower chord maximum deflection degree between an upper chord node and a lower chord node, the extreme truss deflection degree and the axial stress; and S5, viewingthe damage representation, analyzing the damage mode and target to obtain the effective node distance and member failure mode in a SPF parallel chord wood truss design. Through adoption of the method,the problem of incapability