The Research On The Installation Of Long-span Cable-stayed Cable-arch Structure On Simulation Analysis

The long-span cable-stayed cable-arch steel structure is a new kind of long-span spacial structure. This structure system is a combination with cable-stayed structure and cable-arch structure. It has some character of cable-stayed structure or cable-arch structure but it is different from either one. The long-span cable-stayed cable-arch steel structure has excellent capability and economical structure system. And the structure can adapt various structure planes and have great promise. However, the complicated shape and few projects make it difficult to install such structure and the rules of installation are not known completely. For knowing these rules, the paper will do some research, such as:1. Summarize the technique characteristic of the usual installation way; analyze the primary factor that affecting the determine on selecting install way; combine with installation of Zheng-zhou project analyze the progress on selecting install way; The study shows that any install way must assort with the existing conditions and these conditions maybe become the primary restrict and decide the final plan.2. Summarize the foundation of the theory and method on simulation analysis; Select the feat method on Separate structure; build a relevant model and make simulation analysis by ANSYS.3. Analyze the force and displacement that be brought by construction and offer foundation on designing install and reinforce project. The result by simulation analysis is more exact than other because the simulation analysis methods take account of the progress of install and unify the compute and install. The result will help engineers take the measure for reinforcing the buildings.4. The infection of installation is different for the same structure when it construct by the different way, because the difference of the install way will bring the different construction stress route. Evidently, that is an important standard for select install project. The paper will analyze two install way of the Zheng-zhou installation project by simulation analysis and optimize it;5. Do the special research in the important and complicated problem in the installation of Zheng-zhou project. These problems include stretch of the cables and the lifting of the truss; Select good stretch plan and lifting plan by simulation analysis; design a rational stretch order and compute stretch force in the installation; design the plan on lifting point; analyze the influence on structure internal force combining variance in truss lifting and compute a rational lifting control value; check the member's security combining in lifting.