附著狀態(tài)超高層建筑施工電梯震害分析
[Abstract]:In the construction stage, construction tools are easily damaged by natural disasters or human factors, threatening the safety of construction personnel. As a common construction tool, the construction elevator is very sensitive to earthquake because of its own characteristics. The Ludian earthquake affected the construction system of Wanda twin towers, including construction elevators, in Xishan District of Kunming to a certain extent. If the magnitude of the earthquake exceeds the Ludian earthquake, or the construction of the main structure is carried out at a higher height, it is very likely that the construction elevator will be damaged by the earthquake, and even the construction accident will occur. Therefore, it is necessary to study the attached super-high-rise construction elevator in detail under earthquake action. Taking the Ludian earthquake as the research background, this paper uses SAP2000 finite element software to analyze the seismic response characteristics of the construction elevator of Wanda double tower in Xishan, Kunming, and chooses the seismic fortification target of the construction elevator, which is "small earthquake does not stop, medium large earthquake does not collapse". Matches the main structure fortification target. The main achievements are as follows: (1) according to the different working conditions of the elevator, the finite element model of the attachment state is established, and the main modal characteristics of the attached elevator are obtained by using the Ritz vector modal analysis method. The main characteristics of the vibration mode of the attached elevator are the low-order bending deformation and the torsional deformation. It provides the basis for the study of the dynamic characteristics of the elevator in the construction of the attached state under the subsequent earthquake. (2) based on the elastic time history analysis method, the internal force state of elevator rod under frequent earthquakes is calculated and the strength is checked. The results show that the load, the height of the hoist and the direction of seismic action all affect the internal force of the rod, and verify that the strength of the rod meets the requirements. It also satisfies the fortification target of "small earthquakes", and lays a foundation for the exploration of the rules of damage evolution of elevator rod under frequent earthquakes. (3) based on the elastoplastic time history analysis method, the deformation degree of the elevator structure is calculated under earthquake fortification and rare earthquake, and the different elevators have different plastic hinge states in different parts of the bar, which indicates the elevator height. The height of the hoisting cage has a great influence on the whole structure, which proves that the elevator has been in a dangerous or collapsing state and does not meet the fortification target of "medium and large earthquake does not collapse". It provides a reference for the analysis of the collapse catastrophe mechanism of the elevator under the action of strong earthquake.
【學(xué)位授予單位】:昆明理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TU976.3
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