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(1 青島理工大學(xué)土木工程學(xué)院, 青島 266033;2 青島理工大學(xué)工程質(zhì)量檢測(cè)鑒定中心, 青島 266033)

摘要: 提出了一種采用雙連接板的 L 形實(shí)體式方鋼管混凝土組合柱,為了研究其抗震性能,設(shè)計(jì)了 3 個(gè)采用不同的鋼管連接件的尺寸(寬度分別為 100mm 或 200mm)、不同軸壓比(0. 4 和 0. 6)的試件. 對(duì)各試件施以不同的豎向恒載,進(jìn)行了擬靜力試驗(yàn),討論了試驗(yàn)參數(shù)對(duì)試件抗震性能的影響. 結(jié)果表明:連接板寬度與水平峰值荷載和剛度呈正相關(guān),增加連接板寬度對(duì)兩者的提升很大,與延性和耗能能力呈負(fù)相關(guān),增大連接板寬度兩者有所下降,而且更寬的連接板會(huì)加劇強(qiáng)度退化和剛度退化;豎向恒載與水平峰值荷載和耗能能力呈負(fù)相關(guān),加大軸壓比導(dǎo)致兩者均變小,且加劇了剛度衰減,但是能在一定程度上改善延性,強(qiáng)度退化也更均勻. 通過(guò)有限元模擬研究了鋼管壁厚度、鋼管管徑和鋼材強(qiáng)度等級(jí)對(duì)組合柱受力性能的影響. 結(jié)果表明:增大鋼管壁厚度、鋼管管徑都可以顯著加強(qiáng) L形雙連接板實(shí)體式方鋼管混凝土組合柱的水平峰值荷載和剛度,但變形能力即延性也明顯下降;提高鋼材強(qiáng)度等級(jí)則能使水平峰值荷載和延性都得到改善.

關(guān)鍵詞: 鋼管混凝土組合柱; 雙連接板; 低周往復(fù)荷載試驗(yàn); 抗震性能; 水平峰值荷載

中圖分類號(hào):TU352. 1+1,TU398+. 9 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)10-0047-08

DOI:10. 19701 / j. jzjg. 20201323

Study on seismic performance of L-shaped solid concrete-filled square steel tubular composite columns with double connecting plates

YANG Xiaoming1, LI Jinhang1, HAN Xiaokun2, LIU Kai2

(1 School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China; 2 Engineering QualityInspection and Appraisal Center, Qingdao University of Technology, Qingdao 266033, China)

Abstract: An L-shaped solid concrete-filled square steel tubular composite column with double connecting plates wasproposed. In order to study its seismic performance, three specimens with different dimensions of steel tube connectors(width: 100mm or 200mm, respectively) and different axial compression ratios (0. 4 and 0. 6) were designed. Pseudostatic tests were carried out on each test-piece under different vertical dead loads, the impact of test parameters on theseismic performance of the test-piece was discussed. The results show that the width of the connecting plate is positivelycorrelated with stiffness and horizontal peak load, while increasing the width of the connecting plate greatly improves both,and is negatively correlated with ductility and energy dissipation capacity. Increasing the width of the connecting platedecreases both, and wider connecting plates can exacerbate strength and stiffness degradation; The vertical dead load isnegatively correlated with horizontal peak load and energy dissipation capacity. Increasing the axial compression ratio leadsto both becoming smaller and exacerbating the stiffness attenuation, but it can improve ductility to some extent, and thestrength degradation is more uniform. The effects of steel pipe wall thickness, pipe diameter, and steel strength grade onthe mechanical properties of composite columns were studied through finite element simulation. The result show thatincreasing the thickness and diameter of the steel tube wall can significantly enhance the horizontal peak load and stiffnessof the L-shaped solid concrete-filled square steel tubular composite columns with double connecting plate, but the ductilityalso significantly decrease; Increasing the strength grade of steel can improve both the horizontal peak load and ductility.

Keywords:concrete-filled steel tubular composite column; double connecting plate; low-cycle repeated load test; seismicperformance; horizontal peak load

第一作者:楊曉明,博士,研究員,主要從事鋼結(jié)構(gòu)研究、建筑結(jié)構(gòu)鑒定與加固,Email: yxmqd59@ 163. com.

[引用本文] 楊曉明,李金杭,韓孝坤,等. L 形雙連接板實(shí)體式方鋼管混凝土組合柱抗震性能研究[J]. 建筑結(jié)構(gòu),2023,53(10):47-54. YANG Xiaoming,LI Jinhang,HAN Xiaokun,et al. Study on seismic performance of L-shaped solid concrete-filledsquare steel tubular composite columns with double connecting plates[J]. Building Structure,2023,53(10):47-54.