Secondly, a geometric nonlinear static finite element analysis program of cables, bars and beams is presented . an incremental iterative method based on the newton-raphson method is adopted here to solve the nonlinear equation . a calculation example is given to demonstrate the necessity of thinking over geometric nonlinear affect 其次,編制了索、梁、桿平面結(jié)構(gòu)系統(tǒng)的幾何非線性靜力分析程序,計(jì)算中采用了基于newton-raphson法的增量迭代法求解非線性方程組,并給出了算例。
Taking the long span continuous rigid-frame structure of the south bank approach spans of wuhan tianxingzhou changjiang river bridge as the research object, and using the large scale finite element analysis program ansys and two ways of modeling with solid element and spatial beam element, this paper respectively analyzes the dynamic characteristics of the rigid-frame structure of the approach spans, makes a study of the influences of rigidity changes and bearings failure of the thin-wall piers on the dynamic characteristics of the structure of the approach spans and also compares the results of numerical analysis of the two kinds of modeling 摘要以武漢天興洲長(zhǎng)江大橋南岸引橋大跨度連續(xù)剛構(gòu)為研究對(duì)象,運(yùn)用大型有限元分析程序ansys,采用實(shí)體模型與空間梁?jiǎn)卧獌煞N建模方式,分別分析了其動(dòng)力特性,探討了薄壁墩的剛度變化與支座失效對(duì)其動(dòng)力性能的影響,并對(duì)兩種模型的數(shù)值分析結(jié)果進(jìn)行了比較。
This paper analyzes how structure characteristic of old concrete pavement affects the load stress of asphalt overlay by the three dimensions finite element analysis program-adina . ( 2 ) the asphalt overlay design in rehabilitation of old cement concrete pavement asphalt overlay design not only relates the distress, structure characteristic, traffic and environment of the old pavement, but also requires reasonable mechanics model, correct material parameter, effective measure of preventing reflection cracking, and so on (2)舊水泥混凝土路面瀝青罩面改造中瀝青罩面層的設(shè)計(jì)舊路改造的罩面設(shè)計(jì)方法不僅涉及舊路面的損壞、結(jié)構(gòu)狀況、交通狀況、環(huán)境因素,而且還需要合適的力學(xué)分析模型、正確的材料參數(shù)、有效的防反射裂縫措施等,內(nèi)容廣泛、復(fù)雜多變,至今尚未有成熟的設(shè)計(jì)方法。