本文選題：框剪結(jié)構(gòu) + 預(yù)應(yīng)力效應(yīng)　； 參考：《蘭州交通大學(xué)》2017年碩士論文

【摘要】：后張預(yù)應(yīng)力混凝土結(jié)構(gòu),現(xiàn)有的規(guī)范和規(guī)程都是基于端部無(wú)約束梁的工作原理建立的公式來(lái)對(duì)其進(jìn)行結(jié)構(gòu)抗裂驗(yàn)算、截面承載力計(jì)算,因此對(duì)簡(jiǎn)支梁、連續(xù)梁及沒(méi)有側(cè)向約束影響的預(yù)應(yīng)力結(jié)構(gòu)比較適用,而對(duì)于有側(cè)向約束的預(yù)應(yīng)力結(jié)構(gòu),豎向構(gòu)件的側(cè)向約束對(duì)預(yù)應(yīng)力梁的軸向變形有一定的約束作用,因而影響預(yù)應(yīng)力在梁內(nèi)的傳遞,造成預(yù)應(yīng)力損失,導(dǎo)致預(yù)應(yīng)力梁的有效預(yù)應(yīng)力降低�？蚣艚Y(jié)構(gòu)中采用預(yù)應(yīng)力結(jié)構(gòu),剪力墻側(cè)向剛度比較大,對(duì)有效預(yù)應(yīng)力的影響較大。本文以蘭州市榆中縣新世界商業(yè)中心工程為背景,采用等效荷載法,通過(guò)有限元軟件SAP2000,研究了框剪結(jié)構(gòu)中單跨、多跨、多層預(yù)應(yīng)力梁在側(cè)向約束作用下的預(yù)應(yīng)力損失,探討不同張拉方案下預(yù)應(yīng)力梁的預(yù)應(yīng)力損失規(guī)律,結(jié)合國(guó)內(nèi)外研究成果從設(shè)計(jì)和施工構(gòu)造方面給出了減小側(cè)向約束對(duì)預(yù)應(yīng)力效應(yīng)影響的措施,主要結(jié)論如下:(1)剪力墻側(cè)向剛度越大,梁內(nèi)預(yù)應(yīng)力損失值越大;隨著梁的跨度增大,梁內(nèi)預(yù)應(yīng)力損失值越大;不同大小的張拉力作用下梁內(nèi)預(yù)應(yīng)力損失值近似相同,張拉力的大小對(duì)預(yù)應(yīng)力效應(yīng)沒(méi)有影響。(2)隨著跨數(shù)的增多,側(cè)向構(gòu)件越多,側(cè)向約束越大,跨內(nèi)最大預(yù)應(yīng)力損失值越大;多跨結(jié)構(gòu)中剪力墻靠近中間跨時(shí)梁中的最大預(yù)應(yīng)力損失值最小,即較大側(cè)向約束構(gòu)件靠近中間處越近側(cè)向約束對(duì)預(yù)應(yīng)力效應(yīng)的影響越小。(3)多層結(jié)構(gòu)整體一次張拉時(shí),梁中最大預(yù)應(yīng)力損失值出現(xiàn)在最低層;多層結(jié)構(gòu)逐層澆筑逐層張拉時(shí),梁中最大預(yù)應(yīng)力損失值出現(xiàn)在最頂層。(4)不同的張拉施工方法、合理的施工順序組成的混合施工能避免結(jié)構(gòu)整體澆筑一次張拉法及逐層澆筑逐層張拉法所出現(xiàn)的最不利影響。
[Abstract]:For post-tensioned prestressed concrete structures, the existing codes and regulations are based on the formula established by the working principle of the end unconstrained beam to calculate the crack resistance of the structure and the bearing capacity of the section. Continuous beams and prestressed structures without lateral constraints are more suitable, but for prestressed structures with lateral constraints, the lateral constraints of vertical members have a certain constraint on the axial deformation of prestressed beams. Therefore, the transmission of prestress in the beam is affected, which results in the loss of the prestress and the reduction of the effective prestress of the prestressed beam. In frame shear structure, the lateral stiffness of shear wall is relatively large, which has a great influence on effective prestress. Based on the project of New World Commercial Center in Yuzhong County, Lanzhou City, this paper studies the prestressing loss of single-span and multi-story prestressed beams in frame-shear structures under lateral restraint by using equivalent load method and finite element software SAP2000. This paper probes into the law of prestress loss of prestressed beams under different tensioning schemes, and puts forward some measures to reduce the influence of lateral restraint on the prestress effect from the aspects of design and construction structure combined with the domestic and foreign research results. The main conclusions are as follows: (1) the larger the lateral stiffness of the shear wall, the greater the loss value of the prestressing force in the beam; the greater the loss value of the prestress in the beam is with the increase of the span of the beam; The magnitude of tensile force has no effect on the prestress effect. (2) with the increase of the number of spans, the more lateral members, the greater the lateral constraint, the greater the maximum loss of prestress in the span; In multi-span structure, the maximum prestress loss value of shear wall near intermediate span beam is the minimum, that is, the larger lateral restrained member is near the middle, the smaller the influence of lateral constraint on the prestressing effect. (3) when the multistory structure is in a single tension, The maximum prestress loss value in the beam appears in the lowest layer, and the maximum prestress loss value in the beam appears at the top layer when the multi-story structure is tensioned layer by story. (4) different construction methods of tensioning, The mixed construction composed of reasonable construction sequence can avoid the most adverse effects of the one-time tensile method and the storie-by-layer tensile method of the whole structure.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU973

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張慶凱;王革;葉玲;;預(yù)應(yīng)力超靜定結(jié)構(gòu)側(cè)向約束的理論分析[J];低溫建筑技術(shù);2014年08期

2 李玉瑩;傅傳國(guó);梁書亭;孫修禮;;利用改進(jìn)綜合內(nèi)力法計(jì)算現(xiàn)代預(yù)應(yīng)力混凝土結(jié)構(gòu)[J];建筑結(jié)構(gòu);2008年06期

3 王春武;孟少平;;預(yù)應(yīng)力混凝土框架結(jié)構(gòu)的側(cè)向約束分析[J];工業(yè)建筑;2007年08期

4 樓黔秋,簡(jiǎn)政,高曉梅;側(cè)向約束對(duì)預(yù)應(yīng)力樓蓋受力性能的影響[J];西北水力發(fā)電;2005年03期

5 張瑞云,曹雙寅;側(cè)向約束對(duì)體外預(yù)應(yīng)力加固框架梁承載能力影響分析[J];工業(yè)建筑;2005年04期

6 吳勝達(dá),秦士洪,李唐寧,高順,李玲;重慶浪高凱悅大酒店預(yù)應(yīng)力寬扁梁設(shè)計(jì)[J];建筑結(jié)構(gòu);2004年07期

7 劉榮桂,陸春華,雷麗恒,呂志濤;現(xiàn)代預(yù)應(yīng)力結(jié)構(gòu)耐久性(碳化)模型研究[J];工業(yè)建筑;2004年04期

8 陳矛;有粘結(jié)預(yù)應(yīng)力安全殼結(jié)構(gòu)預(yù)應(yīng)力設(shè)計(jì)簡(jiǎn)述[J];特種結(jié)構(gòu);2004年01期

9 陳樹(shù)華,欒偉偉;側(cè)向柱對(duì)預(yù)應(yīng)力框架影響的等效彈簧模型[J];哈爾濱工程大學(xué)學(xué)報(bào);2003年06期

10 熊學(xué)玉,蔡躍,黃鼎業(yè),王燕華;預(yù)應(yīng)力轉(zhuǎn)換層桁架大梁受柱抗側(cè)剛度影響分析[J];建筑結(jié)構(gòu);2003年05期

相關(guān)碩士學(xué)位論文 前1條

1 陳傳鼎;預(yù)應(yīng)力混凝土框架梁側(cè)向約束影響的研究[D];合肥工業(yè)大學(xué);2008年

，

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