884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

李升才，章炯

（華僑大學(xué)土木工程學(xué)院， 泉州 362021）

 

［摘要］以偏心距為主要控制參數(shù)，對兩組共6個密置焊接環(huán)式復(fù)合箍筋約束高強(qiáng)混凝土柱進(jìn)行大、小偏心受壓靜力加載試驗(yàn)研究和有限元數(shù)值模擬對比分析。研究結(jié)果表明，焊接環(huán)式箍筋的約束作用可以較大地提高高強(qiáng)混凝土偏心受壓柱的極限承載力、延性性能和受壓區(qū)混凝土的極限壓應(yīng)變，對改善柱的受力和變形性能、提高結(jié)構(gòu)的抗震性能具有重要意義。

建議考慮密置焊接環(huán)式復(fù)合箍筋對混凝土的約束作用，適當(dāng)修改規(guī)范中偏心受壓柱極限承載力計算公式。

［關(guān)鍵詞］高強(qiáng)混凝土偏心受壓柱；焊接環(huán)式箍筋；約束作用；承載力；延性

中圖分類號：TU317+.1, TU398      文獻(xiàn)標(biāo)識碼：A      文章編號：1002-848X(2013)10-0071-05

 

Research on confinement effect of welding ring stirrups in eccentrically loaded high-strength concrete columns

Li Shengcai, Zhang Jiong

 (College of Civil Engineering, Huaqiao University, Quanzhou 362021, China)

 

Abstract: Using eccentricity as the main controlling parameter, two groups of six high-strength concrete columns confined by closely arranged welding composite ring stirrups were researched under large eccentric and small eccentric compression static loading tests, and comparative analysis of the columns by finite element numerical simulation was performed. The research results show that ultimate bearing capacity, ductility and concrete ultimate compressive strain of eccentrically loaded high-strength concrete columns are greatly improved by confinement effect of welding ring stirrups, which has great significance to improve the mechanical behavior and deformation property of columns, as well as the seismic performance of the structure. It is recommended to consider the confinement role of the closely arranged welding ring stirrups and appropriately adjust the ultimate bearing capacity calculation formula of eccentric compression column in the code.

Keywords: eccentrically loaded high-strength concrete column; welding ring stirrup; confinement effect; bearing capacity; ductility

*國家自然科學(xué)基金項(xiàng)目(50948036)，福建省自然科學(xué)基金計劃項(xiàng)目(E0810022)，福建省科技計劃重點(diǎn)項(xiàng)目(2012H0028)。

作者簡介：李升才，博士，教授，Email：lsc50605@hqu.edu.cn。

 

參考文獻(xiàn)

［1］YUENGAR S R, BESAYIP, REDDY K N. Stress-strain characteristic of concrete confined in steel binders ［J］. Magazine of Concrete Research, 1970, 22(72): 173-184.

［2］CHAN W W L. The ultimate strength and deformation of plastic hinges in reinforce framework ［J］. Magazine of Concrete Research, 1975, 27(21): 121-132.

［3］EID R, DANCYGIER A N. Confinement effectiveness in circular concrete columns ［J］. Engineering Structures, 2006, 28(13): 1885-1896.

［4］SATO Y, NAGATOMO K, NAKAMURA Y. Bond strengthening hooks for RC members with 1300mpa-class shear-reinforcing spirals. PartⅡ: Shear strength estimation based on the BCJC1166 guideline ［J］. Journal of Asian Architecture and Building Engineering, 2006, 5(2): 317-324.

［5］GIUSEPPE CAMPIONE, MARINELLA FOSSETTI. Compressive behavior of concrete elliptical columns confined by single hoops ［J］. Engineering Structures, 2007, 29(3): 408-417.

［6］史慶軒, 楊坤, 姜維山,等. 高強(qiáng)箍筋約束高強(qiáng)混凝土柱的偏心受壓試驗(yàn)研究［J］. 工業(yè)建筑, 2009, 39(10): 76-80.

［7］司炳君, 孫治國, 王東升,等. 高強(qiáng)箍筋約束高強(qiáng)混凝土柱抗震性能研究綜述［J］. 土木工程學(xué)報, 2009, 42(4): 1-9.

［8］過鎮(zhèn)海, 時旭東. 鋼筋混凝土原理和分析［M］. 北京: 清華大學(xué)出版社, 2003.

［9］SHEIKN S A, UZUMERI S M. Strength and ductility of tied concrete columns［J］. Journal of Structural Division, 1980, 106(5): 243-254.

［10］趙東. 高強(qiáng)箍筋約束混凝土偏心受壓構(gòu)件試驗(yàn)及非線性分析［D］. 西安: 西安建筑科技大學(xué), 2008.

［11］姜安慶, 蘇旭霖, 陸洲導(dǎo). 碳纖維布加固小偏心受壓鋼筋混凝土柱承載力分析［J］. 四川建筑科學(xué)研究, 2006, 32(3): 53-55.

［12］唐飛, 孫靜, 劉家蓬. 芳綸纖維布加固小偏心受壓混凝土柱試驗(yàn)研究［J］. 水利與建筑工程學(xué)報, 2009, 7(2): 95-98.

［13］尚守平, 蔣隆敏, 張毛心. 鋼筋網(wǎng)水泥復(fù)合砂漿加固RC偏心受壓柱的試驗(yàn)研究［J］. 建筑結(jié)構(gòu)學(xué)報, 2005, 26(2): 18-25,33.

［14］劉立新, 李洪彥, 張艷麗，等. 500MPa級鋼筋混凝土偏心受壓柱受力性能的試驗(yàn)研究［J］. 鄭州大學(xué)學(xué)報：工學(xué)版, 2007, 6(28): 30-32.

［15］MANDER J B, PRIESTLEY M J N, PARK R. Theoretical stress-strain model for confined concrete ［J］. Journal of Structural Engineering, 1988, 114(8): 1804-1826.