建筑學(xué)論文鋼管混凝土構(gòu)件的動(dòng)態(tài)剛度理論

1、鋼管混凝土構(gòu)件的動(dòng)態(tài)剛度理論 鋼管混凝土構(gòu)件的動(dòng)態(tài)剛度理論 a load strength coefficient related stiffness theory of cfst components【中文摘要】 鋼管混凝土構(gòu)件是由薄鋼管和填入的混凝土組成。鋼管混凝土具有一般套箍混凝土的強(qiáng)度高、重量輕、耐疲勞、耐沖擊等優(yōu)點(diǎn),另外還有很多獨(dú)有的優(yōu)點(diǎn):省去支模、拆模的工作和材料,簡(jiǎn)化支架,縮短工期,另外,制作鋼管遠(yuǎn)比制作鋼筋骨架省工省料。在鋼管和混凝土共同工作時(shí),混凝土在套箍作用下處于三向受力狀態(tài),其抗壓強(qiáng)度和變形能力有所增強(qiáng),其剛度也有所增強(qiáng);同時(shí),由于穩(wěn)定性較差的鋼管內(nèi)填了混凝土,使其穩(wěn)定性

2、得到了很大的提高,也增強(qiáng)了其剛度?，F(xiàn)在常用算法和國(guó)內(nèi)外規(guī)程對(duì)鋼管混凝土構(gòu)件的剛度計(jì)算,通常情況下并未考慮二者協(xié)同工作對(duì)剛度的正面影響,因此與工程實(shí)踐不能很好地吻合?；谝陨显?文中提出了一個(gè)剛度隨荷載強(qiáng)度系數(shù)變化的計(jì)算理論,把剛度系數(shù)與荷載強(qiáng)度系數(shù)的關(guān)系假設(shè)為某種函數(shù)關(guān)系。通過(guò)試驗(yàn)和相關(guān)工程數(shù)據(jù)收集,使用數(shù)據(jù)篩選與回歸分析等手段,得出兩者的解析關(guān)系式。再用有限元模擬鋼管混凝土構(gòu)件的受彎時(shí)的力學(xué)行為,進(jìn)而得出材料、構(gòu)件尺寸等對(duì)剛度系數(shù)的影響,最終得出鋼管混凝土構(gòu)件動(dòng)態(tài)剛度理論的數(shù)學(xué)表達(dá)式。該動(dòng)態(tài)剛度理論為鋼管混凝土構(gòu)件的設(shè)計(jì)和計(jì)算提供理論依據(jù),并將進(jìn)一步促進(jìn)鋼管混凝土結(jié)構(gòu)的推廣和應(yīng)用,為相關(guān)設(shè)

3、計(jì)規(guī)程提供參考?！居⑽恼?the cfst component is consisted of thin steel tube and concrete filled in it. not only have cfst components the advantages other cooper concrete components have such as high strength, impact strength and fatigue strength and lower self-weight, but also have their exclusive virtues tha

4、t they economize the work and materials of putting up and stripping formwork, reducing bracket and saving time. and also, comparing with making tendon bracket, bonding steel tube should gobble up less time and materialsat steel cube and concretes teamwork time, cooper concrete is on states of triaxi

5、al compression, so its compressive strength, deformability and stiffness are enhanced. at the same time, the thin steel tubes stability is large improved and its stiffness is also enhanced for the reason that concrete filled in it. however, no normal algorithms or codes refer to the benefit to their

6、 mechanics performance when they co-operation. as a result, the computation usually does not dower into with the actual value of engineeringa theory is proposed that the components stiffness factor is some function of the stress level based on the arguments above. by sift out groups of credent data

7、from those collected and surveyed from experiment and then analyze them, a regular function about stiffness and stress level will be constructed. to take a step forward, series of models were designed in some fem software which simulated the mechanics behaviors of cfst components when bend to obtain

8、 the numerical effect of their materials and size. at last, a stress level related stiffness function of cfst component was finally obtained【中文關(guān)鍵詞】 鋼管混凝土構(gòu)件; 荷載強(qiáng)度系數(shù); 動(dòng)態(tài)剛度; 解析表達(dá)式 【英文關(guān)鍵詞】 cfst component; load strength coefficient; load strength coefficient related stiffness; regular function 【畢業(yè)論文目錄】摘要

9、 3-4 abstract 4 第一章 緒論 7-17 1.1 引言 7-8 1.2 鋼管混凝土構(gòu)件的分類(lèi)及特點(diǎn) 8-10 1.2.1 鋼管混凝土構(gòu)件的分類(lèi) 8 1.2.2 鋼管混凝土結(jié)構(gòu)的特點(diǎn) 8-10 1.3 鋼管混凝土結(jié)構(gòu)的研究現(xiàn)狀及工程應(yīng)用 10-14 1.3.1 研究現(xiàn)狀 10-11 1.3.2 工程應(yīng)用 11-14 1.4 鋼管混凝土結(jié)構(gòu)發(fā)展方向 14-16 1.5 本文研究的必要性 16 1.6 本文研究的內(nèi)容 16-17 第二章 鋼管混凝土構(gòu)件靜態(tài)剛度算法枚舉 17-24 2.1 規(guī)程中的剛度算法 17-20 2.1.1 美國(guó)鋼結(jié)構(gòu)協(xié)會(huì)aisc-lrfd（94）規(guī)程 17-18

10、 2.1.2 歐洲標(biāo)準(zhǔn)協(xié)會(huì)eurocode 4 (ec4-1994)規(guī)程 18 2.1.3 日本建筑協(xié)會(huì)aij鋼管混凝土構(gòu)造設(shè)計(jì)施工指針（1997） 18-19 2.1.4 工程建設(shè)標(biāo)準(zhǔn)化協(xié)會(huì)鋼管混凝土結(jié)構(gòu)設(shè)計(jì)與施工規(guī)程（cecs28:90) 19 2.1.5 中國(guó)電力行業(yè)標(biāo)準(zhǔn)鋼混凝土組合結(jié)構(gòu)設(shè)計(jì)規(guī)程(dl/t5085-1999) 19-20 2.1.6 國(guó)家建筑材料工業(yè)局標(biāo)準(zhǔn)鋼管混凝土結(jié)構(gòu)設(shè)計(jì)與施工規(guī)程（jcj01-89) 20 2.2 其它剛度算法 20-22 2.2.1 蔡紹懷提出的算法 20-21 2.2.2 鐘善桐提出的算法 21-22 2.2.3 韓林海提出的算法 22 2.3 小

11、結(jié) 22-24 第三章 動(dòng)態(tài)剛度法 24-54 3.1 荷載強(qiáng)度系數(shù) 24-25 3.2 極限抗彎承載力 25-27 3.2.1 套箍效應(yīng)系數(shù) 25-26 3.2.2 極限抗彎承載力 26-27 3.3 構(gòu)件內(nèi)力與變形的微分關(guān)系 27-29 3.4 構(gòu)件模擬實(shí)驗(yàn) 29-37 3.4.1 幾何 29 3.4.2 材料 29-30 3.4.3 約束及荷載 30-32 3.4.4 后處理 32-34 3.4.5 數(shù)據(jù)處理 34-37 3.5 對(duì)比分析 37-49 3.5.1 對(duì)比實(shí)驗(yàn) 37-42 3.5.2 驗(yàn)證實(shí)驗(yàn) 42-49 3.6 回歸分析程序簡(jiǎn)介 49-52 3.7 小結(jié) 52-54 3.7.1 套箍效應(yīng)系數(shù) 52 3.7.2 極限抗彎承載力 52 3.7.3 動(dòng)態(tài)剛度 52-54 第四章 動(dòng)態(tài)剛度法的應(yīng)用 54-63 4.1 應(yīng)用原理 54