【摘要】：增大截面加固法是加固鋼筋混凝土結構常用而有效的方法,大量運用于剪力墻結構加固工程中,通常有單面增大截面和雙面增大截面兩種方式。由于兩種加固方法的傳力途徑、受力特點不同,加固剪力墻的抗震性能會受到相應的影響,但是兩者在破壞形態(tài)、滯回特性、承載力、延性、剛度及耗能能力等方面存在的具體差異尚不清楚。因此研究單、雙面增大截面法加固剪力墻的抗震性能,探究兩者的加固效果,將完善我國剪力墻抗震加固領域的研究內容。本文根據(jù)現(xiàn)有的相關研究成果與規(guī)范,設計制作了未加固剪力墻、單面增大截面加固剪力墻與雙面增大截面加固剪力墻3片一字型剪力墻試件,各試件的軸壓比、剪跨比、配筋率均相同,通過擬靜力試驗對三者的抗震性能進行了研究,對比分析了單、雙面增大截面加固剪力墻試件的加固效果。試驗結果表明:(1)增大截面法加固一字型剪力墻試件的滯回特性、承載能力、延性、剛度及耗能能力與未加固一字型剪力墻試件相比均有一定幅度的提升,抗震性能得到明顯改善,加固效果良好,單、雙面增大截面加固法均能有效運用在剪力墻抗震加固工程中;(2)雙面與單面增大截面加固一字型剪力墻試件的抗震性能存在一定的區(qū)別,具體比值如下:初始剛度基本相等,極限承載力比值為1.26,破壞荷載比值為1.21,峰值點位移比為1.04,極限位移比值為1.01,位移延性系數(shù)比值為1.05,等效粘滯阻尼系數(shù)比值為1.09,可見雙面增大截面加固法對一字型剪力墻的抗震加固效果優(yōu)于單面增大截面加固法。在試驗研究的基礎上,采用有限元分析軟件ABAQUS對建立的3片剪力墻模型進行了低周反復加載全過程的數(shù)值模擬,得到了墻體的破壞形態(tài)、應力分布、滯回曲線與極限承載力,將所得結果與試驗結果進行對比分析,驗證了單、雙面增大截面加固法的加固效果和有限元模擬的可靠性。在此基礎上,對加固截面厚度不同的3片單面增大截面加固一字型剪力墻試件進行有限元拓展分析,研究了不同的加固截面厚度對單面增大截面加固一字型剪力墻抗震性能的影響規(guī)律。研究結果表明:(1)模擬結果的破壞形態(tài)特征與試驗相符,極限承載力誤差均在10%以內,有限元分析結果與試驗結果基本吻合,驗證了本文所建立的有限元模型與分析過程是合理可靠的,具有較高的準確性。(2)隨著加固截面厚度的增大,單面增大截面加固一字型剪力墻試件的承載能力與延性整體上呈現(xiàn)不斷上升的發(fā)展趨勢,增長幅度逐漸降低。且加固截面厚度為85mm的單面增大截面加固一字型剪力墻試件的抗震加固效果與加固截面厚度為70mm的雙面加固試件基本接近。綜上所述,增大截面加固法能夠顯著提高一字型剪力墻的抗震性能,是適用于剪力墻抗震加固的有效方法,而雙面增大截面加固法的抗震加固效果優(yōu)于單面增大截面加固法,可以通過增大加固截面厚度的方式使單面增大截面加固一字型剪力墻的抗震性能達到同樣的效果。本文對于增大截面法加固一字型剪力墻抗震性能的初步研究,將為實際剪力墻結構的合理加固提供參考,并為進一步探究增大截面法加固剪力墻的抗震性能,優(yōu)化剪力墻增大截面的加固方式奠定理論基礎,具有重要的研究價值。
[Abstract]:Increased cross-section reinforcement is a common and effective method to reinforce reinforced concrete structures. It is widely used in shear wall structures. There are usually two ways to increase the cross-section on one side and double sides. However, the specific differences between the two methods in failure mode, hysteretic behavior, bearing capacity, ductility, stiffness and energy dissipation capacity are still unclear. Therefore, the study on the seismic performance of shear walls strengthened by single-side and double-side enlarged cross-section method, and the study on the reinforcement effect of the two methods will improve the research content in the field of seismic strengthening of shear walls in China. Relevant research results and codes have been designed and manufactured. Three one-piece shear wall specimens are designed and manufactured. The axial compression ratio, shear span ratio and reinforcement ratio of each specimen are the same. The results show that: (1) The hysteretic behavior, bearing capacity, ductility, stiffness and energy dissipation capacity of the shear wall strengthened by enlarging section method are improved to a certain extent compared with those of the shear wall strengthened by non-strengthening section method. Double-sided enlarged cross-section reinforcement method can be effectively used in shear wall seismic reinforcement engineering; (2) There are some differences between double-sided and single-sided enlarged cross-section reinforcement of a zigzag shear wall specimen seismic performance, the specific ratio is as follows: the initial stiffness is basically equal, the ultimate bearing capacity ratio is 1.26, the failure load ratio is 1.21, the peak displacement ratio is 1.0. 4. The ultimate displacement ratio is 1.01, the displacement ductility ratio is 1.05, and the equivalent viscous damping ratio is 1.09. It can be seen that the seismic strengthening effect of double-sided enlarged section reinforcement method is better than that of single-sided enlarged section reinforcement method. The failure modes, stress distributions, hysteretic curves and ultimate bearing capacity of the wall are obtained by numerical simulation of the whole process of cyclic loading. The results are compared with the experimental results, which verify the reinforcement effect and the reliability of finite element simulation of the single-side and double-side enlarged section reinforcement method. Three specimens of one-way shear wall strengthened with one-way enlarged cross-section are analyzed by finite element method, and the influence of different thickness of strengthened cross-section on the seismic performance of one-way enlarged cross-section shear wall is studied. The results of finite element analysis are in good agreement with the test results, which proves that the finite element model and analysis process established in this paper are reasonable and reliable, and have high accuracy. (2) With the increase of the thickness of the reinforced section, the bearing capacity and ductility of the strengthened shear wall specimens with one-sided section increase gradually. In conclusion, the method of enlarging the cross-section can significantly improve the seismic performance of the I-shaped shear wall and is suitable for shear. The seismic strengthening effect of double-side enlarged section reinforcement method is better than that of single-side enlarged section reinforcement method. The seismic performance of single-side enlarged section reinforced I-shaped shear wall can achieve the same effect by increasing the thickness of reinforcement section. The preliminary study on seismic performance will provide reference for the reasonable reinforcement of shear wall structure, and lay a theoretical foundation for further study on the seismic performance of shear wall strengthened by enlarged section method, and optimize the reinforcement method of shear wall enlarged section, which has important research value.
【學位授予單位】：西南大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU398.2;TU352.11

【參考文獻】

中國期刊全文數(shù)據(jù)庫 前10條

1 封卉梅;趙軍;白書興;;不同纖維片材加固鋼筋混凝土剪力墻試驗研究[J];施工技術;2015年17期

2 史慶軒;王斌;王朋;田建勃;;T形截面RC剪力墻雙向抗震性能對比分析[J];西安建筑科技大學學報(自然科學版);2014年02期

3 王曉燕;蘇益聲;燕柳斌;;一字形型鋼高強混凝土短肢剪力墻抗震性能試驗研究[J];建筑結構學報;2014年02期

4 錢稼茹;宋曉璐;馮葆純;張以超;王海寧;;噴涂混凝土夾心剪力墻抗震性能試驗研究及有限元分析[J];建筑結構學報;2013年10期

5 潘鵬;鄧開來;石苑苑;苗啟松;李文峰;王濤;;低配筋剪力墻單邊抗震加固試驗研究[J];工程抗震與加固改造;2013年02期

6 任錚鉞;王立久;孫治國;;建筑模網(wǎng)混凝土墻體抗震試驗研究與有限元分析[J];工程力學;2012年12期

7 黃建鋒;朱春明;龔治國;張富文;;增大截面法加固震損鋼筋混凝土框架的抗震性能試驗研究[J];土木工程學報;2012年12期

8 鄧宗才;曾洪超;;層內混雜FRP加固混凝土剪力墻抗震性能試驗[J];北京工業(yè)大學學報;2012年10期

9 鄧開來;潘鵬;石苑苑;苗啟松;李文峰;王濤;;老舊住宅中低配筋剪力墻抗震性能試驗研究[J];土木工程學報;2012年S1期

10 劉勛;施衛(wèi)星;王進;;傳統(tǒng)抗震加固技術和新型抗震加固技術的總結與對比[J];結構工程師;2012年02期

中國博士學位論文全文數(shù)據(jù)庫 前4條

1 柯曉軍;新型高強混凝土組合柱抗震性能及設計方法研究[D];西安建筑科技大學;2014年

2 劉祖強;型鋼混凝土異形柱框架抗震性能及設計方法研究[D];西安建筑科技大學;2012年

3 皮天祥;鋼筋混凝土剪力墻小跨高比連梁抗震性能試驗和設計方法研究[D];重慶大學;2008年

4 蔣隆敏;鋼筋網(wǎng)高性能水泥復合砂漿加固RC柱在靜載與低周反復荷載作用下的性能研究[D];湖南大學;2006年

中國碩士學位論文全文數(shù)據(jù)庫 前10條

1 劉超;HPFL加固不同軸壓比RC剪力墻抗震性能研究[D];湖南工業(yè)大學;2016年

2 李政;梁增大截面加固后框架結構的受力性能研究[D];西安科技大學;2015年

3 李龐;剪力墻開洞粘鋼加固的力學性能有限元分析研究[D];長安大學;2014年

4 賈茗子;某框架—剪力墻結構的抗震鑒定與加固研究[D];北京交通大學;2013年

5 周少淵;增設剪力墻抗震加固方法的研究與應用[D];華南理工大學;2011年

6 封卉梅;不同類型片材加固剪力墻性能比較研究[D];鄭州大學;2011年

7 關志賢;濕式外包鋼加固鋼筋混凝土柱非線性有限元分析研究[D];華南理工大學;2010年

8 趙宏強;加大截面法加固混凝土構件的動力性能研究[D];西安科技大學;2008年

9 馬燕杰;柱加大截面、粘鋼、碳纖維加固框架節(jié)點對比分析[D];同濟大學;2007年

10 盛光遠;粘鋼加固鋼筋混凝土剪力墻抗震性能研究[D];同濟大學;2006年

，

本文編號：2247013