【摘要】：近年來隨著我國經濟的迅速發展,輕質高強材料的大量應用,高層建筑和高聳結構正朝著高度越來越高、細長化、輕質高強、阻尼小的方向發展,導致上述結構剛度較柔,對風荷載越來越敏感,在強風荷載作用下的側移和風致加速度明顯增大,風荷載往往成為控制此類高柔建(構)筑物結構設計的主要控制荷載。為控制超高層建筑和高聳結構在強風作用下產生過大的風致側移和風致加速度,以滿足規范對上述結構在強風作用下的變形及舒適度要求。本文把地震工程中常用的摩擦擺(Fricition Pendulum Syetem,FPS)隔震系統和常用的調頻質量阻尼器(Tunned Mass Damper,TMD)被動控制系統有機結合,形成一種新型的摩擦擺調諧質量阻尼器(FPS-TMD)被動控制系統。放置在高層建筑與高聳結構頂部,來達到對主體結構進行風振控制的目的。在對FPS-TMD系統本身的靜動力學特征進行理論分析的基礎上,本文對高聳結構頂部設置此新型FPS-TMD系統,在風荷載作用下的風振響應理論進行了詳細而系統的理論分析和推導。并結合本論文的理論分析成果,以高聳結構廣州新電視塔為實例,在對其順風向脈動風荷載進行模擬的基礎上,采用此高聳結構的豎向集中質量多自由度簡化模型和三維整體有限元模型,對此高聳結構頂部假設設置FPS-TMD的風振控制效率進行了較為系統的分析,并對采用兩類有限元模型進行風振控制的分析結果進行了對比。本文主要研究的內容如下:對摩擦擺調諧質量阻尼器(FPS-TMD)系統的力學特征、自治動力特性進行了相關研究及部分計算公式的推導,闡明了FPS-TMD系統自身的靜動力學特性。在此基礎上推導建立了多高層結構頂部帶FPS-TMD系統與主體結構相結合的結構體系,在風荷載作用下的風致時程動力分析的相關數值方法及動力分析策略。利用諧波疊加法,結合對廣州新電視塔進行風洞實驗的分析結果,利用準定常假定對與主體結構的順風向荷載進行數值模擬,應用廣州新電視塔的豎向集中質量多自由度簡化模型。假設其頂部設置FPS-TMD被動控制系統,通過選用FPS-TMD系統的不同參數,如FPS-TMD系統質量、滑道半徑、不同摩擦系數模型等,對此高聳結構進行了風振響應及風振控制效率的參數化分析。數值分析表明通過選用適當的FPS-TMD系統參數,對主體結構的風振位移和風致加速度控制效率明顯。通過對大型通用有限元軟件SAP2000的摩擦擺隔振阻尼器單元,進行改進和擴充,采取一系列分析工況的組合,實現了利用SAP2000軟件,進行高層建筑和高聳結構頂部設置FPS-TMD系統的風振時程動力分析方法。同時采用廣州新電視塔三維整體有限元模型,選用多種不同的風振控制模型,對此高聳結構進行了在選用不同模型工況下的風振響應及風振控制效率分析,對各類不同分析工況下的風振控制結果進行了對比分析。采用三維有限元整體模型的數值分析表明,用多重質量塊的FPS-MTMD系統,以及設置雙向FPS-TMD系統后,對本文中所涉及的分析工況而言風振控制效率接近。但設置雙向FPS-TMD系統時,可以有效抵御來自包括順風向和橫風向荷載的共同作用。通過本文綜合分析表明,本文提出的FPS-TMD系統可以有效地減少風荷載對主體結構的風致振動響應,同時FPS-TMD系統因為具有良好的穩定性和自復位、自限位功能。FPS-TMD系統作為一種有效的被動減振裝置,可以有效地利用于高層建筑和高聳結構的風振控制體系中。
[Abstract]:In recent years, with the rapid development of our country's economy, many applications of lightweight high-strength materials, high-rise buildings and high-rise structures are moving toward higher and higher heights, elongated, light-weight, high-strength and small damping, resulting in the above-mentioned structural rigidity being more flexible and more sensitive to wind load. Side-shift and wind-induced acceleration under strong wind load are obviously increased, and wind load tends to be the main control load to control the structural design of such high-flexible buildings (structures). In order to control the high-rise building and the high-rise structure, a large wind-induced side-shift and wind-induced acceleration are generated under the action of strong wind, so as to meet the requirements for deformation and comfort of the structure under strong wind action. In this paper, a novel friction pendulum tuning mass damper (FPS-TMD) passive control system is formed by combining the common friction pendulum (FPS) seismic isolation system and the common FM mass damper (TMD) passive control system in seismic engineering. and the aim of wind vibration control on the main body structure is achieved by placing the high-rise building and the top of the high-rise structure. Based on the theoretical analysis of the static dynamic characteristics of FPS-TMD system, this paper introduces the new FPS-TMD system at the top of the high-rise structure, and gives a detailed analysis and deduction of the wind-vibration response theory under wind load. Based on the analysis of the theoretical analysis of the thesis, based on the simulation of the wind load of the high-rise building, the multi-degree-of-freedom simplified model and the three-dimensional integral finite element model of the high-rise structure are adopted. At the top of this high-rise structure, the wind vibration control efficiency of FPS-TMD is analyzed, and the results of wind vibration control using two kinds of finite element models are compared. The main contents of this paper are as follows: The mechanical characteristics and autonomous power characteristics of the friction pendulum tuned mass damper (FPS-TMD) system are studied and some calculation formulas are derived, and the static and dynamic characteristics of FPS-TMD system are expounded. On the basis of this, the structure system of FPS-TEX system and the main body structure in the top of the multi-layer structure is deduced, and the relevant numerical method and dynamic analysis strategy of the wind-induced time-range dynamic analysis under wind load are established. Based on the analysis of the wind tunnel experiment of Guangzhou New TV Tower by harmonic superposition method, a numerical simulation of the wind tunnel load with the main structure is carried out by using the quasi-stationary assumption, and the multi-degree-of-freedom simplified model of the vertical concentrated mass of the new TV tower in Guangzhou is applied. Assuming that the top of the system is equipped with FPS-TMD passive control system, the wind vibration response and wind vibration control efficiency of the high-rise structure are analyzed by selecting different parameters of FPS-TMD system, such as FPS-TMD system mass, slideway radius, different friction coefficient model, etc. Numerical analysis shows that the wind-vibration displacement and the wind-induced acceleration control efficiency of the main body structure are obviously improved by selecting the appropriate FPS-TMD system parameters. Through the improvement and expansion of the friction pendulum vibration isolation damper unit of the large-scale general-purpose finite element software SAP2000, a series of combination of analysis conditions is adopted to realize the wind-vibration time-range dynamic analysis method for the high-rise building and the top of the high-rise structure by using the SAP2000 software. At the same time, the three-dimensional integral finite element model of Guangzhou New TV Tower is adopted, and a variety of different wind vibration control models are selected, and the wind vibration response and the wind vibration control efficiency analysis under different model conditions are selected for the high-rise structure. The wind vibration control results under different analysis conditions were compared and analyzed. Numerical analysis of the three-dimensional finite element model shows that the wind vibration control efficiency is close to the analysis conditions involved in this paper after the FPS-MTMD system with multiple mass blocks and the two-way FPS-MTMD system are set up. However, in the case of a two-way FPS-TMD system, it is possible to effectively resist the common effects of loads from both downwind and crosswind directions. Through the comprehensive analysis of this paper, the FPS-TMD system proposed in this paper can effectively reduce the wind-induced vibration response of wind load on the main structure, and the FPS-TMD system has good stability and self-resetting and self-limiting function. FPS-TMD system is a kind of effective passive vibration damping device, which can be used effectively in the wind vibration control system of high-rise buildings and high-rise structures.
【學位授予單位】：廣州大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU973.213

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