Simulation Technology for Superimposed Cover-Arch Reinforcement Based on Composite Beams
(1 Civil Engineering Research Center for Information Technology of the Ministry of Education, Tongji University, Shanghai 200092; 2 Shanghai Tongyan Civil Engineering Technology Co. Ltd., Shanghai 200092; 3 Shanghai Engineering Research Center of Underground Infrastructure Detection and Maintenance Equipment, Shanghai 200092)
Abstract：
Based on the force characteristics of reinforcement by a superimposed cover arch and the rigidity equiva? lent theory for highway tunnels, parameters are combined and modified for section characteristics of the lining and cover-arch reinforced structure, and the internal force distribution method of a compound section in a beam element is discussed. The composite structure of the lining and superimposed cover arch are simulated using composite beam elements with a sharing node, and the output of the internal force values of lining, cover arch and composite structure are determined by the analysis results. The feasibility and correctness of the calculation model is verified by comparing the numerical validation example, the analytic solution and the ANSYS solution. Based on actual highway tunnel engineering, a finite-element analysis is conducted using composite-beam simulation technology, and the analysis results confirm that the effects of a superimposed cover-arch reinforcement based on composite-beam analysis is rational and intuitive, providing a reference for evaluating the reinforcement effects of similar projects.
2017, Vol. 54 