本文選題：置換加固 + 卸荷　； 參考：《山東建筑大學(xué)》2017年碩士論文

【摘要】：近幾十年來(lái),我國(guó)的建筑業(yè)取得了突飛猛進(jìn)的發(fā)展和巨大的成就,與此同時(shí)我國(guó)的工程質(zhì)量問(wèn)題也較為嚴(yán)重,由于局部混凝土強(qiáng)度不足而產(chǎn)生的工程質(zhì)量問(wèn)題所占比例較大。置換混凝土加固法通常用于局部混凝土有嚴(yán)重缺陷的混凝土構(gòu)件的加固,能從根本上解決混凝土強(qiáng)度不足的問(wèn)題。剪力墻結(jié)構(gòu)具有剛度大、抗震性能好的優(yōu)點(diǎn),在住宅等高層建筑中占據(jù)了重要的地位。因此研究鋼筋混凝土剪力墻結(jié)構(gòu)在置換加固中的內(nèi)力變化具有一定的現(xiàn)實(shí)意義。抽柱工程主要用于建筑使用功能改變,需要增大使用空間的托換工程。研究抽柱過(guò)程中建筑結(jié)構(gòu)的內(nèi)力變化可以為類似的工程提供一定的試驗(yàn)依據(jù)。本文主要對(duì)三個(gè)工程的施工及施工過(guò)程的內(nèi)力變化進(jìn)行了研究,并對(duì)試驗(yàn)進(jìn)行了PKPM計(jì)算及有限元模擬,將模擬結(jié)果與試驗(yàn)結(jié)果做了對(duì)比分析。首先對(duì)工程背景情況做了簡(jiǎn)要概述,并介紹了主要施工過(guò)程及試驗(yàn)方案。然后采用PKPM結(jié)構(gòu)系列軟件對(duì)工程結(jié)構(gòu)進(jìn)行了內(nèi)力計(jì)算,并與試驗(yàn)獲得的數(shù)據(jù)進(jìn)行對(duì)比分析,比較了軟件模擬與試驗(yàn)結(jié)果的差別。A工程結(jié)果表明:剔除T型墻的腹板墻后對(duì)翼緣墻垛的軸力影響較大,對(duì)其他鄰近墻體的軸力影響較小,剔除腹板墻上部的暗梁后對(duì)與暗梁相連的連梁的彎矩影響較大,對(duì)其他構(gòu)件的內(nèi)力影響較小。B工程結(jié)果表明:當(dāng)墻肢較短且鄰近剛度較大的墻肢時(shí),剔除墻體后該墻體的軸力將通過(guò)內(nèi)力重分布分配到其他鄰近的墻體上,結(jié)構(gòu)構(gòu)件內(nèi)力、位移變化較小。C工程結(jié)果表明:對(duì)于具有坡屋頂?shù)捻攲咏Y(jié)構(gòu),在“拱”效應(yīng)的有利作用下,當(dāng)抽掉下部柱后,周邊梁的彎矩變化減小,梁位移大約可以減少28%。最后介紹了置換混凝土加固法的優(yōu)缺點(diǎn),提出在類似工程下可以利用T型剪力墻的翼緣墻肢的有利作用采用免支撐加固法,從而減輕置換加固法存在的施工工藝復(fù)雜、加固成本高、施工技術(shù)難度高等問(wèn)題。
[Abstract]:In recent decades, the construction industry of our country has made great progress and great achievement, at the same time, the engineering quality problem of our country is also more serious, because of the partial concrete strength insufficiency, the engineering quality problem accounts for a large proportion. The replacement concrete reinforcement method is usually used to reinforce concrete members with serious defects in local concrete, which can fundamentally solve the problem of insufficient concrete strength. Shear wall structure has the advantages of high stiffness and good seismic performance, and plays an important role in high-rise buildings such as residential buildings. Therefore, it is of practical significance to study the change of internal force of reinforced concrete shear wall structure in replacement reinforcement. Pillar extraction project is mainly used to change the function of building, and needs to increase the use space of the underpinning project. The study of the variation of the internal force of the building structure during the pumping process can provide a certain experimental basis for similar projects. In this paper, the internal force changes of the construction and construction process of the three projects are studied, and the PKPM calculation and finite element simulation of the test are carried out, and the simulation results are compared with the experimental results. Firstly, the background of the project is briefly summarized, and the main construction process and test plan are introduced. Then, the internal force of the engineering structure is calculated by using the PKPM structure series software, and the data obtained from the test are compared and analyzed. The difference between software simulation and test results is compared. The engineering results show that after removing the web wall of T-shaped wall, the axial force of flange wall is greatly affected, and the axial force of other adjacent walls is less affected. After removing the dark beam on the web wall, the bending moment of the connected beam connected with the dark beam is greatly affected, and the engineering results show that when the wall limb is shorter and the stiffness is larger, the influence on the internal force of other members is small. After removing the wall, the axial force of the wall will be redistributed to other adjacent walls through the internal force distribution. The engineering results show that the internal force and displacement of the structural members change less. The engineering results show that: for the top structure with sloping roof, Under the favorable effect of "arch" effect, when the lower column is removed, the bending moment of the peripheral beam decreases, and the beam displacement can be reduced by 28%. Finally, the advantages and disadvantages of the replacement concrete reinforcement method are introduced, and the advantages of the flange wall limb of the T-type shear wall can be used in similar projects, so as to reduce the complexity of the construction technology of the replacement reinforcement method. The cost of reinforcement is high, the construction technology is difficult and so on.
【學(xué)位授予單位】：山東建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU746.3

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