【摘要】：鋼筋混凝土橋墩在地震荷載作用下極易發(fā)生破壞,作為橋梁重要承重構件,橋墩的安全與穩(wěn)定關乎整個橋梁結構的安全正常使用。若結構主要承重構件破損嚴重且難以修復,即使結構還未倒塌,仍需拆除結構重建,從抗震防災的方面考慮,鋼筋混凝土橋墩應具有足夠的承載力和較好的延性,保證結構安全并較好的消耗地震輸入能量,避免在地震作用下發(fā)生破壞。橋墩延性影響因素眾多,本文主要就配筋率對鋼筋混凝土橋墩延性抗震性能影響進行相關數值模擬分析研究,主要內容及結論如下:(1)介紹了歷史中橋墩破壞典型案例與橋墩抗震性能研究的發(fā)展概況,概述了延性抗震性能分析的主要方法與內容。根據美國太平洋地震研究中心鋼筋混凝土柱抗震性能試驗數據庫(PEER-Structural Performance Database)低周反復荷載作用下鋼筋混凝土柱的試驗資料,分析了縱筋配筋率對鋼筋混凝土柱延性性能的影響規(guī)律。(2)基于實際工程項目,設置縱筋率模擬參數,利用ABAQUS有限元分析軟件進行低周反復模擬研究分析,通過改變縱筋配筋率后試件延性變化可知,位移延性系數隨著配筋率的增加而減小,耗能能力也隨之降低,而剛度呈增大趨勢,根據本文分析確定試件性能較優(yōu)配筋率范圍為0.82%~3.28%。(3)通過分析不同縱筋率與配箍率相互作用下對圓柱式橋墩的延性影響可知,增大縱筋率將提高圓柱式橋墩的承載力,且配箍率越大,該提升效果越明顯�？v筋布置形式對試件承載力、延性以及耗能影響效果不明顯,但考慮施工便利應合理選用鋼筋形式。
[Abstract]:Reinforced concrete pier is easy to be destroyed under earthquake load. As an important bearing member of bridge, the safety and stability of pier is related to the safe and normal use of the whole bridge structure. If the main bearing member of the structure is seriously damaged and difficult to repair, even if the structure has not collapsed, it is still necessary to remove and rebuild the structure. From the aspect of earthquake resistance and disaster prevention, the reinforced concrete pier should have sufficient bearing capacity and better ductility. To ensure the safety of the structure and good energy consumption earthquake input, to avoid damage under the earthquake. There are many factors affecting the ductility of bridge pier. This paper mainly studies the effect of reinforcement ratio on seismic behavior of reinforced concrete pier. The main contents and conclusions are as follows: (1) the typical cases of pier failure in history and the development of pier seismic performance research are introduced, and the main methods and contents of ductile seismic performance analysis are summarized. According to the experimental data of reinforced concrete columns under low cyclic loading (PEER-Structural Performance Database), the seismic behavior test database of reinforced concrete columns of Pacific Seismic Research Center of the United States of America is presented. The influence of reinforcement ratio of longitudinal reinforcement on ductility of reinforced concrete columns is analyzed. (2) based on the actual project, the simulation parameters of longitudinal reinforcement ratio are set up, and the low cycle repeated simulation analysis is carried out by using ABAQUS finite element analysis software. By changing the reinforcement ratio of longitudinal reinforcement, the ductility of the specimen can be seen that the displacement ductility coefficient decreases with the reinforcement ratio increasing, and the energy dissipation capacity decreases with the increase of reinforcement ratio, while the stiffness increases. According to the analysis in this paper, it is determined that the optimum reinforcement ratio of the specimen is 0.82and 3.28. (3) by analyzing the effect of the interaction of different longitudinal reinforcement ratio and hoop ratio on the ductility of cylindrical piers, Increasing the longitudinal reinforcement ratio will increase the bearing capacity of the cylindrical bridge pier, and the higher the hoop ratio is, the more obvious the lifting effect is. The effect of longitudinal reinforcement arrangement on the bearing capacity, ductility and energy consumption of the specimen is not obvious, but the form of steel bar should be selected reasonably considering the convenience of construction.
【學位授予單位】：西安科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U442.55

【參考文獻】

相關期刊論文 前10條

1 王文科;李雪紅;徐秀麗;史春;梁志雯;;基于Pushover的雙柱墩橋梁抗震延性能力分析[J];工程抗震與加固改造;2015年05期

2 宋波;李凱文;黃帥;;樁墩配筋率比對橋梁結構塑性區(qū)長度的影響[J];建筑科學與工程學報;2013年04期

3 黃崢;白植舟;;鋼筋混凝土橋墩延性影響因素理論研究[J];橋梁建設;2012年04期

4 魏標;李欣;李建中;;以位移為基礎的連續(xù)梁橋抗震設計[J];土木建筑與環(huán)境工程;2010年05期

5 張勤;貢金鑫;;彎剪破壞鋼筋混凝土柱的荷載-變形關系[J];建筑科學與工程學報;2010年03期

6 周科;冷艷玲;;汶川地震橋梁損毀分析及公路橋梁抗震設計初探[J];公路交通科技(應用技術版);2010年06期

7 孫治國;王東升;杜修力;司炳君;郭迅;;鋼筋混凝土橋墩塑性鉸區(qū)約束箍筋用量研究[J];中國公路學報;2010年03期

8 王東升;郭迅;孫治國;孟慶利;于德海;李曉莉;;汶川大地震公路橋梁震害初步調查[J];地震工程與工程振動;2009年03期

9 朱f^;江輝;;橋梁墩柱基于性能的抗震設計方法[J];土木工程學報;2009年04期

10 李鴻晶;陸鳴;溫增平;羅韌;;汶川地震橋梁震害的特征[J];南京工業(yè)大學學報(自然科學版);2009年01期

相關博士學位論文 前1條

1 馬穎;鋼筋混凝土柱地震破壞方式及性能研究[D];大連理工大學;2012年

相關碩士學位論文 前4條

1 徐鳳月;鋼筋混凝土橋墩抗震延性分析[D];安徽理工大學;2014年

2 李貴乾;鋼筋混凝土橋墩抗震性能試驗研究及數值分析[D];重慶交通大學;2010年

3 紀厚強;鋼筋混凝土橋墩抗震性能研究[D];長安大學;2010年

4 楚志堅;鋼筋混凝土矩形橋墩延性抗震計算研究[D];北京交通大學;2010年

，

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