【正文】
ucture simplified calculation, by which loading condition of structure parts is analyzed so as to make sure macro path of load distribution and transfer in the structure. The entire stiffness of the structure is preliminary identified with the aid of finite element analysis software so as to lay a solid foundation for rod selection and structure optimization. The putation of load condition of each rod is pleted in structure detail calculation, mainly calculation of axial force and bending moment which would provide theoretical support. The structure checking putation is the final audit of the project, mainly for the stability of the structure.We would describe fabrication process of the structure as independent chapters, including bar and node production, the assembly process of main beam, the measures of connection and leveling of entire structure, Bamboo adhesiveness, by which to show the actual manufacture process from various aspects.28第2部分 結(jié)構(gòu)設(shè)計(jì)說明 結(jié)構(gòu)概念設(shè)計(jì)本次比賽的題目是帶屋頂水箱的竹質(zhì)多層房屋結(jié)構(gòu),所采用的材料是竹質(zhì)材料,作品最終是要獲得結(jié)構(gòu)質(zhì)量與結(jié)構(gòu)剛度的最優(yōu)組合。模型的總體設(shè)計(jì)分豎向布置與模向布置。聯(lián)系生活實(shí)例,其中高塔,煙囪都是設(shè)計(jì)成底部大,頂部小, 這樣的結(jié)構(gòu)其穩(wěn)定性要比垂直型的好,又考慮到頂部水箱的面積為124*124mm,在方案二就將模型形式調(diào)整為上小下大,頂部面積為130*130mm,底部面積為200*200mm,利用結(jié)力學(xué)求解器可以看出兩者間的差異,(其中兩者定義相同的豎向荷載和地震簡化荷載條件) 圖 表一:方案一自由振動數(shù)據(jù)輸出表二:方案二自由振動數(shù)據(jù)輸出、表二做出的結(jié)構(gòu)自振位移變化曲線,由圖可以看出,樓層頂部變形明顯,而且方案二的位移變化優(yōu)于方案一,故模型做成下寬上窄的合理性得到了驗(yàn)證。用502膠水來粘的節(jié)點(diǎn)不能視來完全剛結(jié)點(diǎn),將其視為鉸結(jié)點(diǎn)更接近于實(shí)際的結(jié)果,通過結(jié)構(gòu)力學(xué)學(xué)習(xí)我們知道,在幾何圖形中三角形的最穩(wěn)定的,如果能讓一個平面形成一個三角形,那么這個平面就不會變形保持穩(wěn)定。橫向布置樓層間的布置是依據(jù)三角形的穩(wěn)定好,這樣既可以保證結(jié)構(gòu)不易變形也可以省材料。 軟件模擬下靜荷載分布圖 位移結(jié)算結(jié) 靜載作用下整體結(jié)構(gòu)位移圖從整體結(jié)構(gòu)的變形圖上可以看出,結(jié)構(gòu)的位移是均勻變化的,沒有突變,說明結(jié)構(gòu)在整體剛度的設(shè)計(jì)上是合理的,在桿件截面的選取上是合理的,通