斜腹板鋼桁架加固混凝土框架柱的計(jì)算與分析
發(fā)布時(shí)間：2018-11-13 14:00
【摘要】：鋼筋混凝土結(jié)構(gòu)在建筑行業(yè)中的發(fā)展應(yīng)用雖然只有100多年歷史,但到目前為止,鋼筋混凝土結(jié)構(gòu)已成為我國(guó)應(yīng)用最多的一種結(jié)構(gòu)形式,與此同時(shí),中國(guó)也是世界上使用其最多的國(guó)家。然而鋼筋混凝土結(jié)構(gòu)的使用壽命受外界影響較大,如材料和施工質(zhì)量不滿足要求使建筑物處于亞狀態(tài),潮濕的使用環(huán)境、混凝土開裂等會(huì)加速鋼筋的銹蝕,地震等自然災(zāi)害更是直接縮短了其使用周期。在我國(guó),一般民用建筑的設(shè)計(jì)基準(zhǔn)期為50年,重要建筑的設(shè)計(jì)基準(zhǔn)期為100年。那么以設(shè)計(jì)基準(zhǔn)期推算,已有的混凝土結(jié)構(gòu),目前大多數(shù)正處在維修加固和改造的高峰時(shí)期。然而作為一門新興學(xué)科—混凝土結(jié)構(gòu)加固學(xué),僅是近十幾年才提及的事,結(jié)構(gòu)試驗(yàn)研究、理論分析及規(guī)范編制等基礎(chǔ)理論工作,目前均處在起步階段。因此,進(jìn)行相關(guān)方面的計(jì)算和研究來填補(bǔ)目前加固領(lǐng)域的不足是迫在眉睫的事。鑒于外包鋼加固法具有技術(shù)成熟、受力可靠、施工簡(jiǎn)便、現(xiàn)場(chǎng)工作量小等優(yōu)點(diǎn),本文針對(duì)斜腹板鋼桁架加固混凝土框架柱主要進(jìn)行了三個(gè)方面的研究：(1)推導(dǎo)加固柱截面等效抗彎剛度和等效抗壓剛度的計(jì)算公式,并驗(yàn)證其可行性；(2)模擬水平往復(fù)荷載和不同軸壓作用下,鋼筋混凝土框架柱及其斜腹板鋼桁架加固柱的受力性能；(3)模擬水平往復(fù)荷載和同一軸壓作用下,當(dāng)外包角鋼截面面積相同,肢長(zhǎng)、肢厚不同時(shí)對(duì)鋼筋混凝土框架柱加固效果的影響。經(jīng)計(jì)算及ABAQUS模擬分析表明：(1)加固柱截面等效抗彎剛度EI等于考慮剛度退化后的鋼筋混凝土柱截面抗彎剛度ηEcIc與斜腹板鋼桁架加固構(gòu)件的彈性抗彎剛度EgIg之和,加固柱截面等效抗壓剛度EA等于鋼筋混凝土柱截面抗壓剛度EcAc與斜腹板鋼桁架加固構(gòu)件的抗壓剛度EgAg之和；(2)隨著軸壓比的增大,混凝土框架柱及其斜腹板鋼桁架加固柱的極限承載力逐漸增大,但耗能能力和抗震性能逐漸變��；(3)斜腹板鋼桁架對(duì)鋼筋混凝土框架柱有較好的加固效果,使其具有更高的極限承載力、耗能能力和抗震性能；(4)當(dāng)外包角鋼截面面積相同時(shí),改變其肢長(zhǎng)、肢厚對(duì)斜腹板鋼桁架加固柱的極限承載力、耗能能力及抗震性能幾乎不產(chǎn)生影響。經(jīng)計(jì)算分析表明：斜腹板鋼桁架加固混凝土框架柱可以明顯提高原混凝土框架柱的極限承載力、耗能能力和抗震性能,是一種行之有效的加固方法,應(yīng)廣泛應(yīng)用于實(shí)際的維修加固工程當(dāng)中。
[Abstract]:Although the development and application of reinforced concrete structure in the construction industry is only over 100 years old, the reinforced concrete structure has become one of the most widely used structural forms in China, at the same time, China is also the world's most used country. However, the service life of reinforced concrete structure is greatly affected by the outside world, such as the material and construction quality does not meet the requirements to make the building in a sub-state, wet use environment, concrete cracking and so on will accelerate the corrosion of steel bars. Earthquake and other natural disasters are directly shortened its life cycle. In China, the basic design period of general civil buildings is 50 years, and that of important buildings is 100 years. Based on the design reference period, most of the existing concrete structures are in the peak period of repair and reinforcement. However, as a new discipline, the reinforcement of concrete structures is only mentioned in the past ten years. The basic theoretical work, such as structural test research, theoretical analysis and standardization, is now in its infancy. Therefore, it is urgent to make relevant calculation and research to fill the deficiency in the field of reinforcement. In view of the advantages of outsourced steel reinforcement method, such as mature technology, reliable force, simple construction and small workload, etc. In this paper, three main aspects of reinforced concrete frame columns strengthened with inclined web steel truss are studied: (1) the equivalent flexural stiffness and equivalent compressive stiffness of reinforced columns are derived, and the feasibility is verified; (2) simulating the mechanical behavior of reinforced concrete frame column and steel truss reinforced column with inclined web under horizontal reciprocating load and different axial compression; (3) under the same axial compression and horizontal reciprocating load, the reinforcement effect of reinforced concrete frame column is affected by the same cross section area, long limb and different limb thickness. The results of calculation and ABAQUS simulation show that: (1) the equivalent flexural stiffness (EI) of reinforced concrete columns is equal to the sum of the flexural stiffness 畏 EcIc of reinforced concrete columns and the elastic flexural stiffness EgIg of steel truss members strengthened by inclined web steel truss. The equivalent compressive stiffness (EA) of the reinforced column section is equal to the sum of the compressive stiffness (EcAc) of the reinforced concrete column section and the compressive stiffness (EgAg) of the steel truss members strengthened with inclined web plates. (2) with the increase of axial compression ratio, the ultimate bearing capacity of concrete frame columns and steel truss reinforced columns with inclined web plate increases gradually, but the energy dissipation capacity and seismic performance become smaller; (3) the steel truss with inclined web plate has better reinforcement effect on reinforced concrete frame column, which makes it have higher ultimate bearing capacity, energy dissipation capacity and seismic performance; (4) when the cross section area of angle steel is the same, the ultimate bearing capacity, energy dissipation capacity and seismic performance of inclined web steel truss strengthened column are almost unaffected by changing the limb length and limb thickness. The calculation and analysis show that reinforced concrete frame columns with inclined web steel truss can obviously improve the ultimate bearing capacity, energy dissipation capacity and seismic performance of the original concrete frame columns, so it is an effective reinforcement method. It should be widely used in practical maintenance and reinforcement projects.
【學(xué)位授予單位】：沈陽建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU375
本文編號(hào)：2329350
[Abstract]:Although the development and application of reinforced concrete structure in the construction industry is only over 100 years old, the reinforced concrete structure has become one of the most widely used structural forms in China, at the same time, China is also the world's most used country. However, the service life of reinforced concrete structure is greatly affected by the outside world, such as the material and construction quality does not meet the requirements to make the building in a sub-state, wet use environment, concrete cracking and so on will accelerate the corrosion of steel bars. Earthquake and other natural disasters are directly shortened its life cycle. In China, the basic design period of general civil buildings is 50 years, and that of important buildings is 100 years. Based on the design reference period, most of the existing concrete structures are in the peak period of repair and reinforcement. However, as a new discipline, the reinforcement of concrete structures is only mentioned in the past ten years. The basic theoretical work, such as structural test research, theoretical analysis and standardization, is now in its infancy. Therefore, it is urgent to make relevant calculation and research to fill the deficiency in the field of reinforcement. In view of the advantages of outsourced steel reinforcement method, such as mature technology, reliable force, simple construction and small workload, etc. In this paper, three main aspects of reinforced concrete frame columns strengthened with inclined web steel truss are studied: (1) the equivalent flexural stiffness and equivalent compressive stiffness of reinforced columns are derived, and the feasibility is verified; (2) simulating the mechanical behavior of reinforced concrete frame column and steel truss reinforced column with inclined web under horizontal reciprocating load and different axial compression; (3) under the same axial compression and horizontal reciprocating load, the reinforcement effect of reinforced concrete frame column is affected by the same cross section area, long limb and different limb thickness. The results of calculation and ABAQUS simulation show that: (1) the equivalent flexural stiffness (EI) of reinforced concrete columns is equal to the sum of the flexural stiffness 畏 EcIc of reinforced concrete columns and the elastic flexural stiffness EgIg of steel truss members strengthened by inclined web steel truss. The equivalent compressive stiffness (EA) of the reinforced column section is equal to the sum of the compressive stiffness (EcAc) of the reinforced concrete column section and the compressive stiffness (EgAg) of the steel truss members strengthened with inclined web plates. (2) with the increase of axial compression ratio, the ultimate bearing capacity of concrete frame columns and steel truss reinforced columns with inclined web plate increases gradually, but the energy dissipation capacity and seismic performance become smaller; (3) the steel truss with inclined web plate has better reinforcement effect on reinforced concrete frame column, which makes it have higher ultimate bearing capacity, energy dissipation capacity and seismic performance; (4) when the cross section area of angle steel is the same, the ultimate bearing capacity, energy dissipation capacity and seismic performance of inclined web steel truss strengthened column are almost unaffected by changing the limb length and limb thickness. The calculation and analysis show that reinforced concrete frame columns with inclined web steel truss can obviously improve the ultimate bearing capacity, energy dissipation capacity and seismic performance of the original concrete frame columns, so it is an effective reinforcement method. It should be widely used in practical maintenance and reinforcement projects.
【學(xué)位授予單位】：沈陽建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU375
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 徐良進(jìn);毛小勇;張翔;;外包鋼加固鋼筋混凝土梁的抗火性能研究[J];常州工學(xué)院學(xué)報(bào);2014年04期
2 韓超;;在結(jié)構(gòu)設(shè)計(jì)中剛度理論的作用和體現(xiàn)[J];民營(yíng)科技;2014年06期
3 王妮;陳宗平;燕柳斌;陳宇良;;角鋼桁架型鋼混凝土梁純扭試驗(yàn)及損傷分析[J];建筑結(jié)構(gòu);2014年09期
4 張紹武;李妍;許丕元;許哲;;預(yù)制鋼桁架加固鋼筋混凝土框架試驗(yàn)[J];沈陽建筑大學(xué)學(xué)報(bào)(自然科學(xué)版);2014年02期
5 張吉兆;房霆宸;王偉;;外包鋼加固簡(jiǎn)支混凝土柱的屈曲臨界荷載計(jì)算[J];工業(yè)建筑;2013年10期
6 光軍;;剛度理論在既有結(jié)構(gòu)改造加固設(shè)計(jì)中的應(yīng)用[J];建筑結(jié)構(gòu);2013年S1期
7 李俊華;唐躍鋒;劉明哲;于長(zhǎng)海;蕭寒;;外包鋼加固火災(zāi)后鋼筋混凝土柱的試驗(yàn)研究[J];工程力學(xué);2012年05期
8 歐陽煜;戚繼亮;蔡志鴻;;外包鋼加固低強(qiáng)混凝土偏壓柱試驗(yàn)研究[J];建筑結(jié)構(gòu);2011年06期
9 彭小婕;于安林;方有珍;;混凝土損傷塑性模型的參數(shù)分析[J];蘇州科技學(xué)院學(xué)報(bào)(工程技術(shù)版);2010年03期
10 李云貴;黃吉鋒;;鋼筋混凝土結(jié)構(gòu)重力二階效應(yīng)分析[J];建筑結(jié)構(gòu)學(xué)報(bào);2009年S1期
相關(guān)碩士學(xué)位論文 前4條
1 關(guān)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(xué);2010年
2 王蒙;簡(jiǎn)支H型鋼加固混凝土組合梁剛度分析和截面優(yōu)化設(shè)計(jì)[D];天津大學(xué);2009年
3 龍凌;外包鋼筋混凝土加固鋼筋混凝土柱的有限元分析[D];華中科技大學(xué);2007年
4 馬健成;外包鋼加固混凝土柱與鋼梁連接節(jié)點(diǎn)力學(xué)性能研究[D];同濟(jì)大學(xué);2007年
，本文編號(hào)：2329350
本文鏈接：http://sikaile.net/jingjilunwen/jianzhujingjilunwen/2329350.html
最近更新
教材專著
