【摘要】：文中研究了一種新型伸縮傳力轉(zhuǎn)裝置在大跨度多塔斜拉橋中應(yīng)用性能,這種裝置不僅能有效釋放主梁的縱向位移,還能承擔(dān)一定的彎矩并保證行車的平順性。文中以瓊州海峽大橋斜拉橋設(shè)計方案為依據(jù),研究伸縮傳力裝置對不同結(jié)構(gòu)形式多塔斜拉橋結(jié)構(gòu)性能的影響,并確定伸縮裝置的適用性。采用大型通用有限元分析軟件ANSYS分別建立不同跨度、塔數(shù)以及橋塔下塔柱高度等多種全橋模型,利用這些模型對比分析主跨跨中設(shè)置與不設(shè)置伸縮傳力裝置對結(jié)構(gòu)的影響。首先分析了幾何非線性因素對結(jié)構(gòu)設(shè)置伸縮傳力裝置后結(jié)構(gòu)內(nèi)力、位移改變量的影響；然后對各結(jié)構(gòu)模型在恒載、車輛活載及溫度荷載下的受力變形情況進行分析,得出伸縮傳力裝置對結(jié)構(gòu)內(nèi)力和變形的影響,并得出設(shè)置伸縮傳力裝置后結(jié)構(gòu)內(nèi)力改變量與跨度、橋塔下塔高和溫度變化值三個參數(shù)之間的擬合公式。采用考慮地震行波效應(yīng)的多點激勵時程分析法,對多塔斜拉橋跨中設(shè)置伸縮傳力裝置前后的結(jié)構(gòu)動力特性進行比較分析,研究伸縮傳力裝置對于結(jié)構(gòu)抗震性能的影響,進而研究伸縮傳力裝置對于多塔斜拉橋結(jié)構(gòu)在抗震方面的適用性。
[Abstract]:In this paper, the application performance of a new telescopic force transfer device in long-span multi-tower cable-stayed bridge is studied. This device can not only effectively release the longitudinal displacement of the main beam, but also bear a certain bending moment and ensure the ride comfort. Based on the design scheme of Qiongzhou Strait Bridge cable-stayed bridge, the influence of telescopic force transmission device on the structural performance of multi-tower cable-stayed bridge with different structural forms is studied in this paper, and the applicability of the telescopic device is determined. A variety of full bridge models, such as different span, tower number and tower column height under the bridge tower, are established by using the large-scale general finite element analysis software ANSYS. These models are used to compare and analyze the influence of the telescopic force transfer device in the middle of the main span on the structure. Firstly, the influence of geometric nonlinear factors on the internal force and displacement of the structure after the telescopic force transfer device is set up is analyzed. Then the stress and deformation of each structural model under dead load, vehicle live load and temperature load are analyzed, and the influence of telescopic force transfer device on the internal force and deformation of the structure is obtained, and the change amount and span of the internal force of the structure after the telescopic force transfer device is set up. The fitting formula between the three parameters of tower height and temperature variation under the bridge tower. The dynamic characteristics of the structure before and after the telescopic force transfer device in the span of multi-tower cable-stayed bridge are compared and analyzed by using the multi-point excitation time history analysis method considering the seismic traveling wave effect, and the influence of the telescopic force transfer device on the seismic performance of the structure is studied. Furthermore, the applicability of telescopic force transfer device to multi-tower cable-stayed bridge structure is studied.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U448.27

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本文編號：2493877