【正文】
梁中,形成蜂窩組合梁,更能發(fā)揮其優(yōu)越性。將兩種材料組合到一起,可以充分發(fā)揮鋼材抗拉強度高,混凝土抗壓強度高的優(yōu)點。近幾十年來,鋼混凝土組合梁得到了廣泛的應(yīng)用,特別是在高層和超高層建筑、工業(yè)廠房和橋梁結(jié)構(gòu)中。與實腹構(gòu)件相比,蜂窩框架梁高度增大,抗彎承載力有很大的提高,具有較好的力學(xué)性能,適用于大跨度結(jié)構(gòu)中,另外,蜂窩構(gòu)件還具有自重輕、節(jié)省鋼材、美觀、經(jīng)濟效益顯著等優(yōu)點。在高層鋼結(jié)構(gòu)建筑中,樓層中管道的通過勢必會增加層高,而現(xiàn)有建筑管道大多在樓層下部通過,占有一定的高度。作為發(fā)展綠色建筑的一個重要突破口,大力推進綠色建筑勢必帶動建筑鋼結(jié)構(gòu)產(chǎn)業(yè)的發(fā)展,蜂窩構(gòu)件作為一種新型的鋼結(jié)構(gòu)形式具有較好的發(fā)展前景。鋼結(jié)構(gòu)作為一種低能耗建筑材料,隨著技術(shù)的發(fā)展和施工水平的提高,建筑鋼結(jié)構(gòu)新形式不斷出現(xiàn),逐漸向節(jié)約化、合理化發(fā)展,這樣在保證結(jié)構(gòu)的受力要求的同時也使材料得到充分利用,節(jié)約鋼材。 Finite element第一章 緒論 課題研究背景由于鋼結(jié)構(gòu)具有良好的力學(xué)性能,隨著鋼材產(chǎn)量、質(zhì)量和品種的發(fā)展,近年來鋼結(jié)構(gòu)在建筑結(jié)構(gòu)中應(yīng)用廣泛,大力發(fā)展鋼結(jié)構(gòu)已經(jīng)成為中國工程建設(shè)中的一項重大技術(shù)政策,鋼結(jié)構(gòu)建筑已經(jīng)成為建筑結(jié)構(gòu)的主要形式之一[1]。 Shear strength。 In bridge structure of the steelconcrete posite beam honeyb is formed by bining the main beams with bridge deck fully exert the advantages of the both materials.Over the past decades, the application of cellular steel structure has been changed from the single use of cellular beam and cellular column to various forms, such as the beamcolumn connections of cellular steel frame, cellular steel frame, cellular posite structure and so on. the cellular structure has been applied in the United States, Japan and some European countries, and the calculation method of cellular beam and steelconcrete posite beam is simply established in the appropriate specifications, but the corresponding calculation method is not accurate with some certain deviation. So far, there are no design specifications of the cellular beam and cellular posite beam in China, so the extensive and deep research and study on the cellular beam and steelconcrete posite cellular beam should be done in order to satisfy the needs of gradually increasing engineering applications and provide reference for the establishment of the corresponding design specifications. In this paper, study on shear strength and mechanical performance under bending .The shear force of cellular beam and steelconcrete posite cellular beam is conducted from following aspects:It theory the overseas related specifications, procedures and the domestic relevant design method provisions on the shear strength calculation method about cellular beam and posite cellular beams are analyzed and discussed, and their advantages and deficiencies are paratively analyzed to determine the research content of the paper. Based on the foreign scholars’ shear experiments’ researches of the cellular beam and posite cellular beam, numerical analysis is conducted with the finite element program, a calculation model of the cellular beam and steelconcrete posite beam is built. The analysis results are pared with the test results about the bearing capacity and curve, the established finite element model on the shear strength calculation is effective.The influence of hole shape, hole size, flange size and such parameters of , and cellular beam on shear strength parameters has been analyzed, the shear strength calculation of the cellular beam has been established by analyzing the shear strength of cellular beam with different parameters which provides reference for engineering applications. The differences between cellular beam and steelconcrete posite cellular beams have been analyzed, and study on the influence of concrete slabs on shear strength of cellular beam has been done. By calculating posite cellular beams’ shear strength with different concrete slab sizes and different connection degrees and bining theoretical analysis with numerical fitting method, a shear strength calculation method of the steelconcrete posite cellular beams is given considering the function of concrete slabs and the effect of the connection degree.By analyzing the mechanical performance of the steelconcrete posite cellular beams under the joint force of bending and shearing the related formula of posite cellular beams is established to instruct the design. a new form under more reasonable force is put forward by heightening the position of the vertical position of the holes in posite cellular beams. Key words: Cellular beam。通過對鋼混凝土蜂窩組合梁在彎矩和剪力共同作用下的受力性能分析,建立了蜂窩組合梁彎剪相關(guān)公式,為設(shè)計做指導(dǎo);通過改變蜂窩組合梁孔洞豎向位置,提出受力更加合理的蜂窩組合梁新形式。對比蜂窩梁和鋼混凝土蜂窩組合梁工作性能,分析混凝土板對蜂窩梁抗剪承載力的影響。以已有的蜂窩梁和蜂窩組合梁抗剪實驗研究為基礎(chǔ),利用有限元軟件建立蜂窩梁和鋼混凝土蜂窩組合梁計算模型,驗證了本文建立的有限元模型對蜂窩梁和蜂窩組合梁抗剪計算的有效性。我國現(xiàn)在尚無蜂窩梁與蜂窩組合梁的設(shè)計規(guī)范,為滿足逐漸增多的工程需要,和為相應(yīng)規(guī)范的推出提供參考,應(yīng)對蜂窩梁及鋼混凝土蜂窩組合梁進行廣泛和深入的研究。近幾十年來,蜂窩鋼結(jié)構(gòu)從蜂窩梁、蜂窩柱單獨使用向蜂窩梁柱節(jié)點、蜂窩框架和蜂窩組合結(jié)構(gòu)等多種形式轉(zhuǎn)變。鋼混凝土蜂窩組合梁抗剪性能研究摘 要:蜂窩梁是H型鋼或工字型鋼腹板沿折線切割后錯位焊接所形成的一種鋼結(jié)構(gòu)構(gòu)件形式。蜂窩梁具有抗彎承載力高,利用孔洞穿越管道可以降低層高,具有較好的力學(xué)、美學(xué)和經(jīng)濟效益等優(yōu)點,在建筑結(jié)構(gòu)中通過栓釘把鋼梁和混凝土樓板連接形成組合樓板,在橋梁中將主梁與橋面板連接形成鋼混凝土蜂窩組合梁,可以充分發(fā)揮鋼梁與混凝土兩種材料的優(yōu)點。蜂窩結(jié)構(gòu)在美國、日本以及歐洲一些國家的高層建筑,工業(yè)廠房中應(yīng)用較多,并將蜂窩梁和鋼混凝土蜂窩組合梁簡化計算方法納入相應(yīng)規(guī)程,但是相應(yīng)計算方法并不精確,存在一定誤差。本文對蜂窩梁和鋼—混凝土蜂窩組合梁抗剪性能以及彎剪共同作用下的受力性能進行了以下幾方面研究:從理論上分析和論述了國外相關(guān)規(guī)范、規(guī)程以及國內(nèi)相關(guān)設(shè)計方法中對蜂窩梁和蜂窩組合梁抗剪強度計算的規(guī)定,對比分析它們的優(yōu)點和存在的不足,確定本文的研究內(nèi)容。分析了六邊形孔、圓形孔和矩形孔蜂窩梁的孔型、開孔大小、翼緣尺寸等參數(shù)對抗剪性能的影響,對不同參數(shù)下的蜂窩梁進行抗剪承載力分析,建立了蜂窩梁抗剪強度計算公式,為工程應(yīng)用提供參考。通過不同混凝土板尺寸、不同連接程度蜂窩組合梁的計算,采用理論分析與數(shù)值擬合相結(jié)合的方法給出了考慮混凝土板作用和連接程度影響的鋼混凝土蜂窩組合梁抗剪強度計算方法。關(guān)鍵詞:蜂窩梁;鋼混凝土蜂窩組合梁;抗剪強度;彎剪相關(guān)性;有限元AbstractCellular beam is a kind of the steel structure formed by dislocation welding after cutting along the broken line of or web. Cellular beam possesses high flexural capacity and reduces the story by crossing the pipe through the hole. It is well mechanical, aesthetical and economical. In the building structure the connected floor is formed by bining steel beams with concrete floor by stud。 Steelconcrete posite beam。 correlation。近幾年來,國家大力提倡低碳綠色建筑,特別是國家“十二五”規(guī)劃的提出,加快了低碳綠色建筑的發(fā)展步伐。因此,鋼結(jié)構(gòu)的應(yīng)用越來越注重采用材料強度高、結(jié)構(gòu)形式經(jīng)濟合理、承載力大的新型結(jié)構(gòu)形式。隨著高層鋼結(jié)構(gòu)設(shè)計理論和建造技術(shù)的成熟,鋼結(jié)構(gòu)建筑總體造價的降低,以及國家鼓勵鋼結(jié)構(gòu)應(yīng)用的政策使得高層建筑鋼結(jié)構(gòu)、大跨度鋼結(jié)構(gòu)和輕型鋼結(jié)構(gòu)建筑在我國獲得前所未有的發(fā)展,高層以及多層建筑、辦公樓運用鋼材建造主體結(jié)構(gòu)也不斷增加。在鋼結(jié)構(gòu)高層建筑中,蜂窩框架梁腹板開孔后,利用孔洞通過管道,有效的解決了管道占用樓層高度的問題。在建筑結(jié)構(gòu)中,通過剪力連接件將框架鋼梁與混凝土樓板連接可以形成組合樓板,在橋梁結(jié)構(gòu)中將鋼結(jié)構(gòu)主梁與混凝土橋面板連接形成鋼混凝土組合梁。鋼材具有抗拉和抗壓強度高的優(yōu)點,但是在應(yīng)用中一般截面小、穩(wěn)定性差,容易發(fā)生失穩(wěn)破壞;混凝土具有抗壓強度高的優(yōu)點,但是與抗壓強度相比,抗拉強度很低,較小的拉力下即產(chǎn)生裂縫,使其失去抗拉強度。同時,通過組合作用防止鋼梁整體失穩(wěn),彌補了混凝土抗拉強度低的缺點。近年來,國內(nèi)外將蜂窩梁和蜂窩組合梁應(yīng)用于土木工程領(lǐng)域的實例越來越多,各國學(xué)者越來越重視對蜂窩構(gòu)件的研究。國內(nèi)學(xué)者對蜂窩構(gòu)件也進行了較多的研究,尚未形成一套完整的理論計算方法納入到規(guī)范中,至使國內(nèi)在應(yīng)用蜂窩構(gòu)件時,或是借鑒其他國家的簡化計算方法,或是按實腹的設(shè)計方法進行設(shè)計,尚無一個相對成熟的標準來衡量設(shè)計的可靠性和經(jīng)濟性。蜂窩梁和蜂窩組合梁開孔口,孔口削弱,抗剪性能受多方面因素影響,受力性