Progressive Collapse Analysis On The Suspension Structure Of Tianjin Large Theater Building And The Steel Structure Of Tianjin Library

This paper took the hanging structure system of Tianjian Theater and Tianjinlibrary main structure steel frame structure as the research object, the progressivecollapse resistance of structures are analyzed. The main work is as follow.(1)The domestic and overseas research status of structure progressive collapseresistance was summerised from three aspects,including guidance documents,analytical method and finite element simulation. What’s more, the evaluation criteriaand analytical method about damage of progressive collapse were also introduced.(2)Analysis of structure progressive collapse resistance was conducted based on thesuspended structure of Tianjin Theatre. The influence of the boom’s location on thecapacity of layer’s progressive collapse resistance was considered in the work, and thekey booms were identified according to structure features and components importancecoefficient. Given the simulative conditions of single boom and2booms to failure,the residual structure was calculated using static and dynamic nonlinear method.Evaluation about progressive collapse resistance of the suspended structure wascarried out according to the analysis result, and suggestions about structureprogressive collapse resistance in design and utilization were also proposed.(3)The main structure of Tianjin library using the complex structures of steel bracedframe structure with intersecting plane truss combination, at first basing on energymethod importance coefficients of components were calculated for the middle columnof each edge, corner column and the internal part of the frame column, then identifykey components. Simulation of the damage, the remaining structures to resistprogressive the ability to make the evaluation of collapse.Through core1throughcolumn failure, adjacent through column and support can effectively put the verticalforce transfer to other vertical force components, this paper through nuclear A as theobject of analysis, simulation through column and brace between columns at the sametime the failure condition, on the remaining structure progressive collapse resistanceanalysis, according to the results of analysis corresponding preventiverecommendations. Plane intersection truss in layer4-5formed local edge positioncantilevered structure, the internal force of ventral pole on cantilever parts is relatively large, with some local cantilever structure as the object of analysis, simulation of the regional force maximum abdominal rod failure situation, the remaining structures were calculated and analyzed according to the calculation results, it puts forward corresponding preventive recommendations.