本文選題：砌體結(jié)構(gòu) + 抗震加固�。� 參考：《北方工業(yè)大學》2017年碩士論文

【摘要】：在我國部分村鎮(zhèn)地區(qū)依然存在大量沒有經(jīng)過抗震設(shè)計的普通磚砌體房屋,一旦在地震中破壞倒塌,極大的威脅人民群眾的財產(chǎn)生命安全。隨著經(jīng)濟社會的發(fā)展,出現(xiàn)并發(fā)展了多種針對磚砌體結(jié)構(gòu)的抗震加固方法,拉結(jié)筋加固是一種有效的加固方法,該方法能夠減少對房屋正常使用的影響,但拉結(jié)筋加固對磚砌體結(jié)構(gòu)整體性能的影響有待進一步研究。本文嘗試將普通磚砌體房屋數(shù)值模擬與模型試驗結(jié)果進行對比,在此基礎(chǔ)上對拉結(jié)筋加固的砌體房屋進行全面地數(shù)值模擬研究。本文以某高校學生公寓改造工程為實例,選取該學生公寓走廊一側(cè)兩個宿舍為原型,開展了以下研究內(nèi)容:1、以1:2比例縮尺建立了未采取抗震設(shè)防措施的雙層雙開間磚砌體房屋模型。對磚砌體試驗?zāi)Ｐ瓦M行了 6度罕遇地震作用下的擬動力試驗,得到了試驗?zāi)Ｐ偷奈灰�、恢�?fù)力響應(yīng);進行低周反復(fù)加載試驗得到了試驗?zāi)Ｐ偷臏厍�、骨架曲線和剛度退化曲線,并研究了模型裂縫開展和破壞情況。2、使用ABAQUS軟件建立與試驗?zāi)Ｐ统叽缫恢碌拇u砌體結(jié)構(gòu)數(shù)值模型,對其進行地震作用時程分析和低周反復(fù)加載,并將地震作用和擬靜力模擬結(jié)果與試驗結(jié)果進行了對比分析,驗證了該模型參數(shù)及本構(gòu)模型的選取。3、在ABAQUS模型基礎(chǔ)上,模擬采用拉結(jié)筋加固的模型,通過拉結(jié)筋使軸壓比分別增加0.1～0.4。對不同軸壓比的加固模型進行7度罕遇地震作用下的時程分析,獲得了加固模型的位移、加速度反應(yīng)并進行對比;進行低周反復(fù)加載試驗?zāi)M,得到了加固模型的極限承載力、極限位移、骨架曲線和剛度退化曲線。結(jié)果表明采用拉結(jié)筋加固的磚砌體房屋在7度罕遇地震作用下抗震性能較好,加固模型比未加固房屋的極限承載力、延性有明顯提升,并且隨軸壓比增大效果增加,增加0.2～0.3的軸壓比時增強效果最為明顯,增加的軸壓比超過0.4時效果已不明顯。
[Abstract]:There are still a large number of ordinary brick masonry buildings without seismic design in some villages and towns of our country. Once destroyed and collapsed in the earthquake, the lives of people's property are threatened greatly. With the development of economy and society, a variety of seismic reinforcement methods for brick masonry structures have emerged and developed. Tensile reinforcement is an effective reinforcement method, which can reduce the impact on the normal use of buildings. However, the effect of tensile reinforcement on the overall performance of brick masonry structure needs further study. This paper attempts to compare the numerical simulation of ordinary brick masonry building with the results of model test, and on the basis of this, makes a comprehensive numerical simulation study on the masonry building strengthened with tensile reinforcement. In this paper, two dormitories on one side of the hallway of the college apartment are selected as the prototype, taking the renovation project of a college student apartment as an example. In this paper, the following research content: 1 is carried out, and the model of double-decked brick masonry building without seismic fortification measures is set up with the 1:2 scale. The pseudo-dynamic test of brick masonry test model under the action of 6 degrees rare earthquake is carried out, and the displacement and restoring force response of the test model are obtained, and the hysteretic curve of the test model is obtained by low-cycle repeated loading test. The skeleton curve and stiffness degradation curve, and the crack development and failure of the model are studied. The numerical model of brick masonry structure consistent with the size of the test model is established by Abaqus software, and the seismic time history analysis and low cycle repeated loading are carried out on the model. The seismic action and pseudostatic simulation results are compared with the experimental results, and the parameters of the model and the selection of the constitutive model are verified. The model of tension and reinforcement is used in the simulation on the basis of Abaqus model. The axial compression ratio is increased by 0.1% and 0.4% respectively. The time history analysis of the reinforcement model with different axial compression ratio under the action of 7 degrees rare earthquake is carried out, and the displacement and acceleration responses of the reinforcement model are obtained and compared, and the ultimate bearing capacity of the strengthening model is obtained by the simulation of low cycle repeated loading test. Limit displacement, skeleton curve and stiffness degradation curve. The results show that the brick masonry buildings strengthened with tensile reinforcement have better seismic performance under the rare earthquake of 7 degrees, and the ultimate bearing capacity and ductility of the strengthening model are obviously improved than that of the unstrengthened buildings, and the effect increases with the increase of axial compression ratio. The enhancement effect is the most obvious when the axial pressure ratio of 0.2% is increased, but the effect is not obvious when the axial pressure ratio is more than 0.4.
【學位授予單位】：北方工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU352.11;TU364

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