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（1 國(guó)網(wǎng)甘肅省電力公司經(jīng)濟(jì)技術(shù)研究院， 蘭州 730050； 2 中國(guó)能源建設(shè)集團(tuán)甘肅省電力設(shè)計(jì)院有限公司， 蘭州 730050； 3 西安建筑科技大學(xué)土木工程學(xué)院， 西安 710055）

［摘要］為了研究對(duì)比空心圓鋼管柱和灌砂圓鋼管柱的抗彎承載能力和破壞形式，按足尺比例，對(duì)2個(gè)空心圓鋼管柱和1個(gè)灌砂圓鋼管柱進(jìn)行了抗彎承載力試驗(yàn)研究。分析結(jié)果表明，空心圓鋼管柱和灌砂圓鋼管柱破壞時(shí)，均在柱腳受壓側(cè)發(fā)生鼓曲，但是空心圓鋼管柱的鼓曲較灌砂圓鋼管柱嚴(yán)重，相比空心圓鋼管柱，灌砂圓鋼管柱的水平承載力基本沒(méi)有得到提高，但其抗側(cè)剛度比2個(gè)空心圓鋼管柱抗側(cè)剛度平均值提高6-90%左右?？梢?jiàn)，砂的填充對(duì)圓鋼管柱的水平承載力影響不大。

［關(guān)鍵詞］Q420高強(qiáng)度鋼管； 灌砂圓鋼管柱； 抗彎承載力； 抗側(cè)剛度

中圖分類(lèi)號(hào)：TU392文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2017)19-0102-06

Experimental study on bearing capacity of Q420 high-strength steel tube

Wang Shenggui1, Li Xiaoli1, Song Xiaowei1, Zhang Guangping2, Zhang Yongsheng1, Yang Junfen3

(1 State Grid Gansu Electric Power Company Economic and Technological Research Institute, Lanzhou 730050, China; 2 China Energy Construction Group Gansu Electric Power Design Institute Co.,  Ltd., Lanzhou 730050, China; 3 School of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China)

Abstract:In order to compare and study the bending bearing capacity and the failure form of hollow circular steel tube column and sand-filled circular steel tube column, bending capacity experimental study was conducted on 2 full-scale hollow circular steel tube columns and 1 full-scale sand\|filled circular steel tube column. The analysis results show that when failure occurs in the two kinds of columns, there is bulge failure at the compression side of column foot, and the hollow circular steel tube column features serious damage. Compared with hollow circular steel tube column, horizontal bearing capacity of sand\|filled circular steel tube column is not improved basically, but its lateral stiffness increases about 6-90% more than the average lateral stiffness value of 2 hollow circular steel tube columns. It can be seen that the filling of sand has little influence on the horizontal bearing capacity of circular steel tube column.

Keywords:Q420 high-strength steel tube; sand-filled circular steel tube column; moment-bearing capacity; lateral stiffness

 *國(guó)家電網(wǎng)公司2014年依托工程基建新技術(shù)研究項(xiàng)目（［2014］9）。

作者簡(jiǎn)介：王生貴，本科，高級(jí)工程師，注冊(cè)監(jiān)理師，Email:546925946@qq.com。