Based On Non-cable Saddle Pre-biased Construction Of Suspension Bridge Construction Simulation Analysis

According to zero cable saddle pre-bias idea of suspension construction, the combined method between analysis iteration method based on cable mechanics and FEA method based on finite displacement theory are introduced in this paper. Through the calculation of general FEA program and compiled program, the simulation method of control parameter at fabrication length of the main cable, initial construction state and initial cable height, main tower stress and deformation in the stage of stiffening-girder lift on and anchor span strand jack time and displacement is put forward.Using FEA program ANSYS and the solution reversibility and continuum of finite displacement theory in applying to suspension bridge construction simulation, starting with adjusting the initial strain of element link 10, abandoning the circulation trial method for initial construction state, the efficiency method from the bridge finishing state back up to initial state is established.Practical calculating method for main tower lengthwise buckling and the method of using steel chord strain gage actual measuring the key section of main tower are presented.The monitor and control method of construction is also discussed, thus the control circle is established.