Destruction Feature Extraction of Prefabricated Residential Building Components Based on BIM

Table 2

Basic assumptions of the variable-angle space truss model.

Basic assumption type	Basic assumption content
Basic assumption 1	The oblique concrete rod formed by the spiral crack only bears pressure, and the inclination angle is
Basic assumption 2	The stirrups are regarded as the web members of the space truss, and the longitudinal ribs are regarded as the chords of the space truss, which only bear pressure
Basic assumption 3	It ignores the torsion effect of the concrete in the core area
Basic assumption 4	Under the action of torque, a constant shear flow is formed along the side wall of the box section