Method for calculating damage degree of crack T-beam unit by stress spread angle method

• Main Authors: ZHANG XUEBING, LIU RONGKAI, CHENG PENG, WU ZHENZHEN, PENG HAILONG, ZHANG JIAQI, TANG SHENGHUA, LIU YUXIANG, QIN FUQIAN, KANG DINGDING, FANG JIEWEI
• Format: Patent
• Language: Chinese; English
• Published: 21.04.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention discloses a method for calculating the damage degree of a crack T-beam unit through a stress spread angle method. The method comprises the following steps: setting a proper number of measuring points for the cracked T-beam; calculating the relative height zeta of the crack according to the height of the crack and the section height of the T-beam; calculating a crack additional spring stiffness parameter according to zeta according to a stress intensity factor manual; calculating a crack stress spread angle alpha (zeta) through a rectangular cross-section beam according to an equivalent crack unit linear stiffness method, and calculating a linear diffusion mode according to a calculation formula alpha (zeta) = 74.5-28.895 zeta: calculating an inertia moment of an undamaged T-beam cross section; calculating the inertia moment of the beam section of the stress diffusion part; calculating the damage degree of the stress spread angle method T-beam unit; and calculating the damage degree of the T-beam