本文關(guān)鍵詞：基于子結(jié)構(gòu)試驗方法的SMA-PRM阻尼器防高墩橋梁地震碰撞效能研究　出處：《西南科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 子結(jié)構(gòu)試驗仿真程序 SMA-PRM阻尼器 高墩橋梁 減振效能

【摘要】：實際震害表明,工程結(jié)構(gòu)地震破壞往往只發(fā)生在結(jié)構(gòu)的某些部位或構(gòu)件上,其它部分仍處于完好或基本完好的狀態(tài)。子結(jié)構(gòu)試驗方法作為一種最新的結(jié)構(gòu)抗震試驗方法,提出將結(jié)構(gòu)中容易破壞的、有復(fù)雜非線性的部分作為試驗子結(jié)構(gòu)進行物理試驗,而處于完好或基本完好的線性部分作為計算子結(jié)構(gòu)用計算機進行模擬分析,實現(xiàn)了物理試驗和數(shù)值模擬計算的有機結(jié)合,不僅能夠模擬結(jié)構(gòu)在地震作用下的真實反應(yīng),而且顯著降低了對試驗設(shè)備和試驗?zāi)Ｐ偷囊�。本文基于子結(jié)構(gòu)試驗方法的基本思想和高墩橋梁模型振動臺試驗結(jié)果,利用Matlab/simulink軟件建立并驗證了子結(jié)構(gòu)試驗仿真程序,并將其用于形狀記憶合金金屬橡膠(Shape Memory Alloy Pseudo-rubber Metal,SMA-PRM)阻尼器防高墩橋梁地震碰撞的減振效能研究。本文主要研究內(nèi)容為:(1)進行了SMA-PRM阻尼器不同頻率、位移幅值的往復(fù)加載試驗,研究了SMA-PRM阻尼器的力學(xué)性能,并建立了其本構(gòu)關(guān)系模型。(2)基于子結(jié)構(gòu)試驗方法的基本思想,依據(jù)高墩橋梁(設(shè)置SMA-PRM阻尼器)模型振動臺試驗結(jié)果,利用Matlab/simulink軟件建立高墩橋梁(設(shè)置SMA-PRM阻尼器)子結(jié)構(gòu)試驗仿真程序,并驗證了其有效性,實現(xiàn)了子結(jié)構(gòu)試驗方法的數(shù)值仿真。(3)運用高墩橋梁(設(shè)置SMA-PRM阻尼器)子結(jié)構(gòu)試驗仿真程序,將高墩橋梁模型地震碰撞振動臺試驗臺面輸入的3條地震動(EI Centro地震動、Taft地震動和人造地震動)作為輸入,進行了子結(jié)構(gòu)試驗仿真分析,并與不同碰撞間隙(0.01m和0.015m)的高墩橋梁模型振動臺試驗結(jié)果進行對比,探討了SMA-PRM阻尼器防高墩橋梁地震碰撞的減振效能。研究結(jié)果表明在高墩橋梁中設(shè)置SMA-PRM阻尼器后,能夠防止相鄰跨橋梁發(fā)生地震碰撞,有效降低高墩橋梁的整體地震反應(yīng),從而提高了高墩橋梁的整體抗震性能。
[Abstract]:The actual earthquake damage shows that the earthquake damage of engineering structure usually occurs only in some parts or components of the structure. The other parts are still in good condition or basically intact. The substructure test method, as a kind of latest seismic test method, is put forward to destroy easily in the structure. The parts with complex nonlinearity are used as test substructures for physical tests, while the linear parts which are in good or basic integrity are simulated and analyzed by computer as computational substructures. The organic combination of physical experiment and numerical simulation can not only simulate the real response of structure under earthquake. Moreover, the requirements for test equipment and test model are significantly reduced. This paper is based on the basic idea of substructure test method and the test results of high pier bridge model vibration table. The simulation program of substructure test is established and verified by Matlab/simulink software. It was used in shape Memory Alloy Pseudo-rubber Metal of shape memory alloy. SMA-PRM) dampers are used to study the effectiveness of anti-seismic impact of high-pier bridges. The main contents of this paper are: 1) the SMA-PRM dampers are carried out at different frequencies. The mechanical properties of SMA-PRM damper are studied by reciprocating loading test of displacement amplitude, and the constitutive relation model of SMA-PRM damper is established, which is based on the basic idea of substructure test method. According to the test results of high pier bridge (with SMA-PRM damper) model vibration table test. The simulation program of substructure test of high pier bridge (with SMA-PRM damper) is established by using Matlab/simulink software, and its validity is verified. The numerical simulation of substructure test method is realized. 3) the substructure test simulation program of high pier bridge (with SMA-PRM damper) is implemented. The input of three seismic motions (ei Centro ground motion and artificial ground motion) from the seismic impact table test table of the high pier bridge model is taken as the input. The simulation analysis of substructure test is carried out, and the results are compared with the shaking table test results of high pier bridge model with different impact clearance of 0.01m and 0.015m. In this paper, the effectiveness of SMA-PRM dampers in preventing seismic collisions of bridges with high piers is discussed. The results show that the installation of SMA-PRM dampers in bridges with high piers can prevent the seismic collisions of adjacent bridges. The whole seismic response of high pier bridge is reduced effectively, and the overall seismic performance of high pier bridge is improved.
【學(xué)位授予單位】：西南科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U442.55

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