本文選題：預(yù)應(yīng)力裝配式 + 殘余變形　； 參考：《大連理工大學(xué)》2015年碩士論文

【摘要】：建造工業(yè)化與抗災(zāi)可恢復(fù)是結(jié)構(gòu)工程發(fā)展的目標(biāo)與趨勢。預(yù)應(yīng)力裝配式設(shè)計與施工是實現(xiàn)這個目標(biāo)的有效途徑。目前,國內(nèi)外針對預(yù)應(yīng)力裝配式結(jié)構(gòu)的研究主要集中在構(gòu)件層面,鮮見針對結(jié)構(gòu)體系抗震性能的研究。本文以預(yù)應(yīng)力裝配節(jié)點為研究對象,在節(jié)點中部采用無粘結(jié)高強(qiáng)預(yù)應(yīng)力筋,上下位置布置耗能鋼筋,用以平衡結(jié)構(gòu)損傷控制與耗能能力之間關(guān)系。本文聚焦該形式的預(yù)應(yīng)力裝配式結(jié)構(gòu)的整體抗震性能,據(jù)此開展以下工作：(1)首先,總結(jié)提出了預(yù)應(yīng)力裝配節(jié)點的建模方法�；贠penSEES平臺,采用Truss單元對預(yù)應(yīng)力筋建模；為模擬梁柱界面開裂行為,將交界面梁端區(qū)域設(shè)置為只承壓的區(qū)域,并確定了該區(qū)域長度的合理取值范圍；通過與試驗?zāi)Ｐ偷臏厍�進(jìn)行對比,驗證了本文提出的節(jié)點建模方法的可靠性。(2)其次,探索提出了預(yù)應(yīng)力裝配式結(jié)構(gòu)的設(shè)計原則。為對比預(yù)應(yīng)力裝配式結(jié)構(gòu)與現(xiàn)澆結(jié)構(gòu)的抗震性能,本文提出了梁柱截面具有相同截面尺寸及極限彎矩的原則,給出了不同預(yù)應(yīng)力度下的預(yù)應(yīng)力鋼筋與耗能鋼筋面積的計算方法。并依據(jù)我國現(xiàn)行規(guī)范按VIII度烈度設(shè)防,分別設(shè)計了一榀四層現(xiàn)澆混凝土框架和預(yù)應(yīng)力裝配式框架。(3)最后,通過非線性分析對比研究了預(yù)應(yīng)力裝配框架與現(xiàn)澆框架的抗震性能以及耗能鋼筋配筋率的影響。通過Pushover分析對比了等同截面抗彎性能的兩種結(jié)構(gòu)的頂點位移與基地剪力關(guān)系曲線,研究表明在較小變形下,兩者的曲線基本重合,隨著頂點位移增加,預(yù)應(yīng)力裝配式結(jié)構(gòu)的抗力低于現(xiàn)澆結(jié)構(gòu)。通過非線性時程分析發(fā)現(xiàn),相同截面極限彎矩的兩種結(jié)構(gòu),大震下結(jié)構(gòu)最大響應(yīng)基本相同,但預(yù)應(yīng)力裝配式結(jié)構(gòu)的殘余變形遠(yuǎn)小于現(xiàn)澆結(jié)構(gòu),增加耗能鋼筋面積對預(yù)應(yīng)力裝配式結(jié)構(gòu)的性能影響不大�？傊�,通過對比研究表明預(yù)應(yīng)力裝配式結(jié)構(gòu)的整體抗震性能與現(xiàn)澆結(jié)構(gòu)基本相同,但殘余變形遠(yuǎn)遠(yuǎn)小于現(xiàn)澆結(jié)構(gòu),可實現(xiàn)災(zāi)后功能的快速恢復(fù)。
[Abstract]:Construction industrialization and disaster resilience are the goal and trend of structural engineering development.Prestressing assembly design and construction is an effective way to achieve this goal.At present, the research on prestressing prefabricated structures is mainly focused on the member level, and rarely on the seismic performance of structural systems.In this paper, the prestressing assembly joints are studied, the unbonded high strength prestressed tendons are used in the middle of the joints, and the energy dissipation bars are arranged in the upper and lower positions to balance the relationship between the damage control and the energy dissipation capacity of the structures.This paper focuses on the overall seismic behavior of the prestressing prestressing assembly structure. According to the following work: 1) firstly, the modeling method of the prestressing assembly joint is summarized.Based on the OpenSEES platform, the prestressed tendons are modeled by Truss element, and in order to simulate the interface cracking behavior of Liang Zhu, the end region of the interface beam is set to the region with only bearing pressure, and the reasonable range of the length of the zone is determined.Comparing with the hysteretic curve of the test model, the reliability of the proposed method is verified. Secondly, the design principle of prestressing prefabricated structure is discussed.In order to compare the seismic behavior of prestressing prefabricated structure and cast-in-place structure, the principle that Liang Zhu section has the same cross section size and ultimate bending moment is put forward in this paper, and the calculation method of the area of prestressed steel bar and energy-consuming steel bar under different prestressing degree is given.According to the current code of our country, according to the intensity of VIII, a four-story cast-in-place concrete frame and a pre-stressed prefabricated frame are designed respectively.Through nonlinear analysis, the effects of seismic behavior of prestressed assembly frame and cast-in-place frame on reinforcement ratio of energy dissipation bar are compared and studied.Through Pushover analysis, the curves of the relationship between the vertex displacement and the static shear force of two kinds of structures with the same cross-section flexural performance are compared. The results show that the curves of the two structures basically coincide with each other when the deformation is small, and with the increase of the vertex displacement,The resistance of prestressing prefabricated structure is lower than that of cast-in-place structure.Through nonlinear time history analysis, it is found that the maximum response of two structures with the same ultimate moment of cross section is basically the same, but the residual deformation of prestressing prefabricated structure is much smaller than that of cast-in-place structure.Increasing the area of energy dissipation steel bar has little effect on the performance of prestressing assembly structure.In a word, the comparative study shows that the seismic behavior of prestressing prefabricated structure is basically the same as that of cast-in-place structure, but the residual deformation is much smaller than that of cast-in-place structure, which can realize the rapid recovery of post-disaster function.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU352.11

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本文編號：1738078