發(fā)布時(shí)間：2018-11-24 12:56

【摘要】：為研究高強(qiáng)U形外包鋼-混凝土組合梁在靜載作用下的受彎性能,對(duì)3根完全剪力連接的混凝土強(qiáng)度等級(jí)為C60、C80和外包鋼板強(qiáng)度等級(jí)為Q420、Q460的簡(jiǎn)支組合梁進(jìn)行了兩點(diǎn)對(duì)稱(chēng)集中加載試驗(yàn).分析了試件在彈性與彈塑性階段的受力過(guò)程、荷載-撓度關(guān)系、U形外包高強(qiáng)鋼板與內(nèi)部高強(qiáng)混凝土應(yīng)變的分布規(guī)律、外包鋼板與組合梁端部滑移、裂縫發(fā)展情況以及破壞形態(tài)等;基于試驗(yàn)結(jié)果,提出了高強(qiáng)U形外包鋼-混凝土組合梁正截面受彎承載力計(jì)算方法.研究結(jié)果表明:在靜載作用下,高強(qiáng)U形外包鋼-混凝土組合梁的受彎承載力比普通外包鋼組合梁提高60%以上,位移延性系數(shù)分別為2.16、2.76和2.34,說(shuō)明高強(qiáng)U形外包鋼-混凝土組合梁受彎性能良好.
[Abstract]:In order to study the flexural behavior of high strength U-shaped steel and concrete composite beams under static load, the concrete strength grade of three complete shear connections is C60C80 and the strength grade of the steel sheet is Q420. A two-point symmetrical concentrated loading test was carried out on the simply supported composite beam of Q460. The stress process, load-deflection relationship, strain distribution of U-shaped high strength steel plate and internal high strength concrete, slip of steel sheet and end of composite beam are analyzed. Fracture development and failure form; Based on the experimental results, a method for calculating the flexural bearing capacity of the normal section of high strength U-shaped steel-concrete composite beams is presented. The results show that the flexural capacity of high strength U-shaped steel-concrete composite beams is more than 60% higher than that of ordinary steel composite beams under static loading, and the displacement ductility coefficients are 2.16 ~ 2.76 and 2.34, respectively. It shows that high strength U-shaped steel-concrete composite beams have good flexural behavior.
【作者單位】： 江蘇大學(xué)土木工程系;東南大學(xué)土木工程學(xué)院;
【基金】：國(guó)家杰出青年基金資助項(xiàng)目(50725828) 江蘇省“六大人才高峰”項(xiàng)目(2010-JZ-008) 河南省交通運(yùn)輸科技計(jì)劃項(xiàng)目(2012P43)
【分類(lèi)號(hào)】：TU398.9

【參考文獻(xiàn)】

中國(guó)期刊全文數(shù)據(jù)庫(kù) 前7條

1 張彥玲;閻貴平;安明U，

本文編號(hào)：2353794