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(shì)。預(yù)應(yīng)力裝配式設(shè)計(jì)與施工是實(shí)現(xiàn)這個(gè)目標(biāo)的有效途徑。目前,國(guó)內(nèi)外針對(duì)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(jiàn)針對(duì)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(diǎn)為研究對(duì)象,在節(jié)點(diǎn)中部采用無(wú)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(kāi)展以下工作：(1)首先,總結(jié)提出了預(yù)應(yīng)力裝配節(jié)點(diǎn)的建模方法�；贠penSEES平臺(tái),采用Truss單元對(duì)預(yù)應(yīng)力筋建模；為模擬梁柱界面開(kāi)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(zhǎng)度的合理取值范圍；通過(guò)與試驗(yàn)?zāi)Ｐ偷臏厍�(xiàn)進(jìn)行對(duì)比,驗(yàn)證了本文提出的節(jié)點(diǎn)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(jì)原則。為對(duì)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(jì)算方法。并依據(jù)我國(guó)現(xiàn)行規(guī)范按VIII度烈度設(shè)防,分別設(shè)計(jì)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(guò)非線(xiàn)性分析對(duì)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(guò)Pushover分析對(duì)比了等同截面抗彎性能的兩種結(jié)構(gòu)的頂點(diǎn)位移與基地剪力關(guān)系曲線(xiàn),研究表明在較小變形下,兩者的曲線(xiàn)基本重合,隨著頂點(diǎn)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(guò)非線(xiàn)性時(shí)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(duì)預(yù)應(yīng)力裝配式結(jié)構(gòu)的性能影響不大�？傊�,通過(guò)對(duì)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(shí)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(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TU352.11

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 寧超列;段忠東;;OpenSees中三種非線(xiàn)性梁柱單元的研究[J];低溫建筑技術(shù);2009年03期

2 葉列平;陸新征;馬千里;汪訓(xùn)流;繆志偉;;混凝土結(jié)構(gòu)抗震非線(xiàn)性分析模型、方法及算例[J];工程力學(xué);2006年S2期

3 郭彤;宋良龍;;腹板摩擦式自定心預(yù)應(yīng)力混凝土框架梁柱節(jié)點(diǎn)的理論分析[J];土木工程學(xué)報(bào);2012年07期

相關(guān)碩士學(xué)位論文 前2條

1 陳理卿;預(yù)壓裝配式預(yù)應(yīng)力混凝土結(jié)構(gòu)框架塑性鉸機(jī)理研究及非線(xiàn)性分析[D];合肥工業(yè)大學(xué);2009年

2 代杰;基于Pushover的既有鋼筋混凝土框架結(jié)構(gòu)抗震性能評(píng)估方法研究[D];西南交通大學(xué);2009年

，

本文編號(hào)：1738078