本文關(guān)鍵詞：預(yù)制混凝土框架梁柱自復(fù)位混合接頭抗震性能研究　出處：《蘭州理工大學(xué)》2013年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 預(yù)制混凝土框架 承載力 自復(fù)位 混合接頭 抗震性能

【摘要】：傳統(tǒng)的鋼筋混凝土結(jié)構(gòu)抗震設(shè)計(jì)主要是依靠結(jié)構(gòu)構(gòu)件自身的剛度、強(qiáng)度以及延性來(lái)抵抗地震作用,使結(jié)構(gòu)滿足“小震不壞、中震可修、大震不倒”的抗震防目標(biāo)。但往往由于地震的不確定性與復(fù)雜性,致使建筑結(jié)構(gòu)遭遇比設(shè)防烈度更大的地震作用,以致結(jié)構(gòu)構(gòu)件出現(xiàn)嚴(yán)重破損。此外,建筑結(jié)構(gòu)遭受設(shè)防烈度的地震作用雖沒(méi)有倒塌,但有部分構(gòu)件因其破壞位置的關(guān)鍵性和破壞的嚴(yán)重性難以加固修復(fù)。 本文在對(duì)國(guó)內(nèi)外有關(guān)自復(fù)位結(jié)構(gòu)體系的設(shè)計(jì)規(guī)程以及自復(fù)位體系的理論與試驗(yàn)研究等方面進(jìn)展總結(jié)的基礎(chǔ)上,主要對(duì)一種無(wú)阻尼的預(yù)制混凝土框架梁柱自復(fù)位混合接頭(框架梁柱之間僅采用無(wú)粘結(jié)預(yù)應(yīng)力鋼絞線拼接)進(jìn)行了抗震性能分析。采用ABAQUS有限元軟件建立了6個(gè)預(yù)制混凝土框架梁柱自復(fù)位混合接頭有限元模型,首先施加單調(diào)載荷對(duì)節(jié)點(diǎn)模型的承載力進(jìn)行了參數(shù)分析,主要考察初始預(yù)應(yīng)力、梁端配筋率及配箍率和鋼絞線布置對(duì)節(jié)點(diǎn)承載力的影響；進(jìn)而選取合適參數(shù)建立若干模型,對(duì)其施加往復(fù)載荷,考察初始預(yù)應(yīng)力、鋼絞線布置和加設(shè)消能鋼筋對(duì)節(jié)點(diǎn)自復(fù)位性能以及耗能性能的影響。有限元模擬分析結(jié)果表明：該類(lèi)接頭具有與整澆式節(jié)點(diǎn)相當(dāng)?shù)某跏紕偠群统休d力,且在結(jié)構(gòu)發(fā)生一定的位移后,結(jié)構(gòu)具有良好的自復(fù)位性能,但該類(lèi)節(jié)點(diǎn)耗能性能比較差；轉(zhuǎn)角達(dá)到4%時(shí),框架柱與框架梁大部分均處于彈性狀態(tài)。
[Abstract]:The traditional seismic design of reinforced concrete structures mainly depends on the stiffness, strength and ductility of the structural members to resist the earthquake action, so that the structure can be satisfied with "small earthquake is not bad, moderate earthquake can be repaired." However, because of the uncertainty and complexity of earthquake, the building structure is subjected to earthquake action with greater intensity than fortification, resulting in serious damage of structural members. Although the earthquake action of the fortified intensity of the building structure has not collapsed, some of the components are difficult to be strengthened and repaired because of the critical damage location and the severity of the damage. This paper summarizes the design rules of the self-reset structural system and the theoretical and experimental research of the self-reset system at home and abroad. A kind of undamped prefabricated concrete frame Liang Zhu self-reset hybrid joint is mainly used (only unbonded prestressed steel strands are used between the frame Liang Zhu). The seismic behavior analysis was carried out. Six finite element models of Liang Zhu self-reset hybrid joint of precast concrete frame were established by using ABAQUS finite element software. First, the bearing capacity of the joint model is analyzed by monotone load, and the effects of initial prestress, reinforcement ratio at the end of beam, hoop ratio and steel strand arrangement on the bearing capacity of the joint are investigated. Then the appropriate parameters are selected to establish some models, and the reciprocating load is applied to investigate the initial prestress. The effect of steel strand arrangement and energy dissipation bar on the self-reset performance and energy dissipation performance of the joints. The finite element simulation results show that the joints have the same initial stiffness and bearing capacity as the cast-in-place joints. After a certain displacement of the structure, the structure has good self-reset performance, but the energy dissipation performance of this kind of joints is relatively poor. When the rotation angle reaches 4, most of the frame columns and beams are in elastic state.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TU352.11;TU375

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