Analysis Of Anti-progressive Collapse Of Ecological Composite Wall Structure

In order to meet the development trend of China’s ecological civilizationconstruction and reform of wall materials, ecological composite wall structure whichwas researched is a new structural system of residential architecture, and has broadconstruction market and prospects. It has been applied widely in Shaanxi, Hebei,Ningxia and Henan and other regions. And when the building is subjected to accidentaleffects, such as explosions, earthquakes, structural may collapse progressively. For thepurpose of studying the progressive collapse mechanism and the anti-collapse methodof eco-composite wall structure, the paper select large general finite element softwareSAP2000to make the numerical analysis for the performance of anti-progressivecollapse of the eco-composite wall structure. The main contents are as follows:(1) Regarding at the ecological composite wall structure, combined withanti-progressive collapse analysis methods, put forward the specific methods anddetailed process for the collapse analysis of the eco-composite wall structure, compositewall structure made of ecological collapse detailed analysis of specific methods andprocedures. According to the basic mechanical properties of the eco-composite wallstructure, the paper selects the frame-equivalent bracing mechanical model and usesthe alternate load path method to study collapse numerical analysis, which wouldprovide study ideas for ecological composite wall to resist progressive collapse.(2) The paper has established of ecological composite wall structure plane model,removed vertical members at different positions to simulate the initial damage of thestructure, and analyzed the force transmission of the remaining eco-composite wall structure. The results show eco-composite wall structure collapse mechanism in theplane which is that the diagonal strut damage firstly causing the instable failures of theconnection and the collapse of the structure. And the extent of damage caused by partialfailure is most serious in the corner columns, and the column in the middle is lighter.Based on the analysis results of the collapse in the plane, proposed the criteria suitablefor the evaluation the collapse of eco-composite wall structure.(3) Considering the spatial influence of structure and combining the evaluationcriteria proposed, the paper studies the collapse analysis respectively of aneco-composite wall structure engineering example. The paper removes the fourpositions vertical loaded members under the first floor to simulate the local initialdamage of the structure, and compare and analyze of the overall performance ofcollapse of eco-composite wall structure after the local initial damage. The results showthat eco-composite wall structure has a better anti-collapse performance. Based on theresults of the numerical analysis of the structure anti-progressive collapse, the papergives design recommendations to improve the ability effectively of the eco-compositewall structure anti-progressive collapse，which have a certain effect to the application ofecological composite wall structure.