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

（寧波大學(xué)土木與環(huán)境工程學(xué)院， 寧波 315211）

［摘要］冷彎薄壁型鋼分別與重組竹、竹膠板通過結(jié)構(gòu)粘結(jié)劑復(fù)合成工字形組合梁，以竹板厚度、梁截面高度、薄壁型鋼壁厚及翼緣寬度為參數(shù)，對(duì)冷彎薄壁型鋼-重組竹組合梁、冷彎薄壁型鋼-竹膠板組合梁這兩種試件進(jìn)行彎曲性能試驗(yàn)，圍繞組合梁破壞形態(tài)、整體性能差異、承載力能力及其影響因素、短期集中荷載作用下變形情況進(jìn)行比較。結(jié)果表明，兩種鋼-竹組合梁試件整體工作性能均表現(xiàn)良好，組合效應(yīng)突出，具有較高的承載力及良好的延性；冷彎薄壁型鋼-重組竹組合梁破壞形態(tài)比較單一，與此相比冷彎薄壁型鋼-竹膠板組合梁破壞形態(tài)則較為多樣；組合梁抗彎承載力與材料力學(xué)性能密切相關(guān)，同時(shí)隨著竹板厚度、梁截面高度、薄壁型鋼壁厚及翼緣寬度的增加，承載能力有效提高，且在同等情況下冷彎薄壁型鋼-竹膠板組合梁提高的幅度明顯大于冷彎薄壁型鋼-重組竹組合梁；兩種組合梁按編號(hào)對(duì)應(yīng)相比較，試驗(yàn)參數(shù)基本相同的條件下，冷彎薄壁型鋼-重組竹組合梁的正常使用極限狀態(tài)和承載能力極限狀態(tài)下的承載力均高于冷彎薄壁型鋼-竹膠板組合梁，平均提高約35%。

［關(guān)鍵詞］冷彎薄壁型鋼；  重組竹； 竹膠板； 組合梁； 受彎性能

中圖分類號(hào)：TU398-9文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)16-0107-07

Comparative analysis of flexural behavior of steel-bamboo composite beams based on different kinds of bamboo plates

MAO Ming, ZHANG Jialiang, TONG Keting, LI Yushun

(School of Civil and Environmental Engineering, Ningbo University, Ningbo 315211, China)

Abstract:Cold-formed thin-walled steel had combined with recombined bamboo or bamboo plywood into I-section composite beams. Thickness of bamboo, the height of beam, the thickness of steel and the width of flange were set as the main parameters. Flexural performance tests were experimented between cold-formed thin-walled steel-recombined bamboo composite beam specimens and cold-formed thin-walled steel-bamboo plywood composite beam specimens, which was compared around with failure modes for composite beams, overall performance differences, bearing capacity and its influencing factors, deformation under short-term concentrated load of composite beams. The experimental results indicate that both types of steel-bamboo composite beams have good overall performance, combination effect highlights, high bearing capacity and good ductility. Cold-formed thin-walled steel-recombined bamboo composite beams have a single failure mode, while cold-formed thin-walled steel-bamboo plywood composite beams have different damage patterns. Composite beams bending capacity closely related to material mechanics properties. With the increase of the thickness of bamboo, the height of beam, the thickness of steel and the width of flange, bearing capacity is effectively improved. And under the same conditions, the increase of cold-formed thin-walled steel-bamboo plywood composite beams is significantly larger than cold-formed thin-walled steel-recombined bamboo composite beams. Comparing two kinds of composite beams by number, with all test parameters basically the same, the bearing capacity under normal conditions and ultimate bearing capacity of the cold-formed thin-walled steel-recombined bamboo composite beams are all higher than those of cold-formed thin-walled steel-bamboo plywood composite beams, with an average increase of about 35%.

Keywords:cold-formed thin-walled steel;  recombined bamboo; bamboo plywood; composite beam; flexural behavior

*國(guó)家自然科學(xué)基金項(xiàng)目（51678310，51978345）。

作者簡(jiǎn)介：茅鳴，碩士，工程師，Email:maoming0130@163.com;通訊作者：李玉順，博士，教授，Email:lys0451@163.com。