Test research and computer simulation analysis of construction state during form finding for suspen-dome system  

作　　者：李永梅 史炎升 张毅刚 张力 刘佳 吴金志 

机构地区：[1]Beijing Key Lab of Earthquake Engineering and Structural Retrofit,Beijing University of Technology [2]Key Laboratory of Urban Security and Disaster Engineering,Ministry of Education,Beijing University of Technology

出　　处：《Journal of Harbin Institute of Technology(New Series)》2010年第5期690-696,共7页哈尔滨工业大学学报（英文版）

基　　金：Sposored by the Postdoctoral Science Foundation of China(Grant No.20060390387);the National Natural Science Foundation of China(Grant No.50278004)

摘　　要：A novel construction method without scaffold work called as assembly-prestressing form finding loop by loop is presented.Based on the theory of finite displacement,the cycle-forward analysis method is presented for its construction calculation,which adopts the finite element method of generalized geometric nonlinearity combined with the application in the real construction process.By means of the combination of the forward analysis according to real construction sequence and the cycle iteration according to the initial strain increment method of cable force adjustment,the influence of the structural geometric nonlinearity and the loss of prestress are taken into account due to prestressing of tendons in turn and so on.If the initial cable forces derived from the method were used for construction,expected cable forces and shape could be assured easily.Simulation analysis achieved real-time tracking and controlling of the construction status.Finally,according to the procedure and parameters in simulating,a model experimental research on the stage of form finding(namely prestressing)was carried out for suspen-dome structure.The feasibility on the assembly-prestressing form finding method loop by loop was testified.The cycle-forward analysis method was established and numerical simulation was performed,and the results show that it was useful for the design and the construction of similar suspen-dome structure.A novel construction method without scaffold work called as assembly-prestressing form finding loop by loop is presented.Based on the theory of finite displacement,the cycle-forward analysis method is presented for its construction calculation,which adopts the finite element method of generalized geometric nonlinearity combined with the application in the real construction process.By means of the combination of the forward analysis according to real construction sequence and the cycle iteration according to the initial strain increment method of cable force adjustment,the influence of the structural geometric nonlinearity and the loss of prestress are taken into account due to prestressing of tendons in turn and so on.If the initial cable forces derived from the method were used for construction,expected cable forces and shape could be assured easily.Simulation analysis achieved real-time tracking and controlling of the construction status.Finally,according to the procedure and parameters in simulating,a model experimental research on the stage of form finding（namely prestressing）was carried out for suspen-dome structure.The feasibility on the assembly-prestressing form finding method loop by loop was testified.The cycle-forward analysis method was established and numerical simulation was performed,and the results show that it was useful for the design and the construction of similar suspen-dome structure.

关 键 词：SUSPEN-DOME assembly-prestressing form finding loop by loop cycle-forward analysis the increment of initial strain form finding test 

分 类 号：TU394[建筑科学—结构工程] P315.9[天文地球—地震学]