Coupling damage fracture failure mechanism of dangling pavement panels along the river
In order to prevent water damage along the riverside road,the damage constitutive equations for double crack penetration damage factor,suspension damage factor,and fatigue damage factor were proposed based on the analysis of the stress characteristics of dangling concrete pavement panels along the river.According to the analysis of its fracture mechanics double crack model,coupled damage fracture analysis was carried out,and the coupled damage fracture stress intensity factors of type Ⅰ and type Ⅱ at the double crack tip under the action of vehicle and gravity were calculated to obtain the joint stress intensity factor(Ke).Following the maximum circumferential stress criterion,a coupled damage fracture constitutive equation and a comprehensive stability coefficient discriminant was constructed.Research has been conducted to determine the stability coefficient and stress values at the crack tip of the double crack main control structural surface of the suspended pavement under coupled damage fracture effects at different suspen-sion ratios and penetrations.Also driving suggestion values were provided based on the backward method.Finally,the relationship among total damage degree,number of cycles,and strain was analyzed through examples,verifying the accuracy of the damage frac-ture model and damage constitutive formula.
dangling pavement panelscoupling damage fracturestability coefficientstress at the crack tiptotal damage degree
万方数据
维普
