Aim for the topic - study of prestressed lightweight concrete platform , from selecting style of the platform , to matching concrete material and admixture , to designing and building the model , to carrying out experiments of temperature field and stress performance , and analysis of finite element , some research work have been done as follows : 1 本文針對“輕質(zhì)高強(qiáng)預(yù)應(yīng)力混凝土平臺的研究”這一課題,從罐體結(jié)構(gòu)型式的確定,混凝土基本材料及外加劑的選配,模型的設(shè)計制作,到模型結(jié)構(gòu)在各種外荷載及溫度荷載作用下的受力性能試驗(yàn)研究及罐體結(jié)構(gòu)的有限元分析,展開了如下幾個方面的研究: 1
Because the experimental bridge is an arcade bridge which is comprised of three four - arched bridges , micro - expansive lightweight concrete , micro - expansive ordinary concrete and ordinary concrete are used in each four - arched bridge respectively in order to comprehend the performance of light expanded lightweight aggregate concrete profoundly and contrast effects of different materials 為了更好地掌握輕質(zhì)微膨脹砼的加固性能以及對比不同加固材料的加固效果,針對實(shí)橋?yàn)?孔1聯(lián),共計3聯(lián)的特點(diǎn),各聯(lián)的加固分別采用了輕質(zhì)微膨脹砼、普通微膨脹砼和普通砼三種不同材料。
Referring to the forms of floor solution abroad , autoclaved lightweight concrete ( alc ) floor used in low buildings and precast alc composite slab used in middle buildings are put forward . furthermore , the calculational methods and corresponding analyses are discussed . ( 4 ) research on design method of low light gauge steel constructions in north america 本文研究全工業(yè)化的輕鋼龍骨體系在低、多層住宅中的結(jié)構(gòu)性能,以結(jié)構(gòu)體系創(chuàng)新為出發(fā)點(diǎn),開展一系列理論研究,并以相應(yīng)試驗(yàn)來檢驗(yàn)理論分析結(jié)果,對推動輕鋼龍骨體系在我國的應(yīng)用具有理論和應(yīng)用價值。
Being lightweight aggregate , the chemical mineral constituents and physical mechanics properties of lytag are analyzed . meanwhile properties of haydite concrete using lytag as coarse aggregate are also studied . the influences on lightweight concrete qualities by introducing wollastonite and chemical admixtures are researched which proves the important roles of wollastonite and admixtures in construction of concrete platforms 分析了作為輕骨料的粉煤灰陶粒的化學(xué)、礦物成分和物理力學(xué)性能以及用它作為粗骨料配制出的輕質(zhì)混凝土的各項(xiàng)特性;研究了摻入硅灰和減水劑等外加劑對混凝土的強(qiáng)度、耐久性和新拌混凝土可工作性的影響;說明了硅灰和化學(xué)外加劑在海洋平臺混凝土施工中不可或缺的作用。