1) Region of negative bending moment
负弯矩分布区
2) negative moment
负弯矩区
1.
In order to study the behavior of external prestressed beams under negative moments,two beams flexure behaviors under negative moment were tested.
为了研究体外预应力组合梁负弯矩区抗弯承载能力,完成了2片体外预应力梁在负弯矩作用下的受弯性能试验。
2.
In order to study the effect of web openings on the behavior of composite beams under negative moment,three perforated and one unperforated cantilever composite beams were designed and tested.
为研究腹板开洞对负弯矩区组合梁受力性能的影响,对三根腹板开洞外挑组合梁和一根对比梁进行了试验研究,考虑是否开洞、洞口大小、洞口补强等参数的影响。
3.
In recent years, the steel-concrete composite girder bridge is more and more applied in the continuous beam structure, the continuous bridge received the very big negative moment function in the bridge pier.
因此,对曲线钢—混凝土组合梁负弯矩区的抗裂性能进行综合研究,是合理进行桥梁设计的需要。
3) hogging moment region
负弯矩区
1.
Finite element analysis on flexural loading capacity of composite slim beam with deep deck in the hogging moment region;
负弯矩区深肋组合扁梁抗弯性能的有限元分析
2.
In this paper,a artificial neural model is made on ultimate bearing capacity forcasting of hogging moment region of continuous composite beam,learning parameters are optimized and some specimen are studied and forecasted with the model that the results is satisfactory.
确定连续组合梁负弯矩区极限承载力预测的人工神经网络模型,优化学习参数,并用该网络模型对样本进行学习与预测。
4) negative moment area
负弯矩区
1.
Methods for controlling crack width of concrete slab in negative moment area of continuous composite bridges;
连续结合梁桥负弯矩区混凝土板裂缝宽度控制方法研究
2.
Using prestressed measures to deal with negative moment area of the continuous composite beam;
用预应力措施处理连续结合梁中负弯矩区
5) negative bending moment area
负弯矩区
1.
Keywords:composite beams;negative bending moment area;crack;nonlinear finite elemen
在模拟组合梁负弯矩区工作性能的单跨倒置简支组合梁试验的基础上,结合普通钢筋混凝土构件的有限元非线性分析方法,引进钢梁单元,采用涂抹式裂缝模型和正交各向异性的混凝土材料模型,建立了针对模拟组合梁负弯矩区的单跨倒置简支组合梁的裂缝非线性模型,以试验梁为对象进行了非线性分析及裂缝模拟,其计算结果与试验结果吻合良好。
2.
The model test results indicated that the SFRSSC composite layers may effectively decrease the moment in the negative bending moment area in the service phase and enhance the cracking moments by 51.
模型试验结果表明,钢纤维自应力混凝土产生的自应力可明显降低连续梁负弯矩区使用阶段的弯矩值,用钢纤维自应力混凝土加固的连续叠合T形梁负弯矩区混凝土的开裂弯矩较用普通混凝土加固提高51。
6) concrete flange in tension
负弯矩区
1.
The investigation results showed that reinforcement content, force ratio, and space of stud connectors are the main influence factors on the crack width of concrete flange in tension of composite beams.
对四根反向加载钢—混凝土简支组合梁和两根两跨连续钢—混凝土组合梁进行了试验研究,对组合梁负弯矩区的工作性能进行了探讨。
补充资料:负二项分布
负二项分布
negative binomial distribution
概率为p的B即旧d石试验(及moulh幼aIs)概形中第;次“成功”以前失败次数的分布;在这种场合通常称之为1、,习l分布(Pascaldjs川bu石on),它是r分布(步田u一曲tribution)在离散情形的类似.当:二l时,负二项分布重合于几何分布(罗。“r州c dis川bu-石on)负二项分布经常出现于与分布参数的随机化有关的问题中;例如,如果Y是一随机变量,以义为条件时有带随机参数几的R血期1分布( Poisson distri-bo石on),而又又有密度为 一二一x;一,。一,x>o,环>o r(拜)的r分布,那么y的边缘分布将是参数尹二召,p=:/(l+“)的负二项分布.负二项分布还可作为翻扣分布(P6lya distribution)的极限形式. 有负二项分布,且分别以p与::,…,r。为参数的n个独立随机变量x;,…,x。之和,也是负二项分布的,且以p与;,+…十;,为参数.对于大的r及小的q,若:q一兄,负二项分布可用参数为又的Poisson分布逼近.负二项分布的许多性质都由它是广义化的PO讹。n分布这一事实所规定.【补注】亦见二项分布(b止lon五目此tribution).负二项分布「此,肠陀愉目丽闭业州h心佣;0,.”眼月研Oe6HHOM““研oe paCnPe琴理IUIel 取非负整数k=0,1,一的随机变量X按公式 。。v_,_、_了r+k一1、_r,,_、* P{X=k}=l“t’1夕r(l一夕)盆(*) \k/‘定义的一种概率分布(probabU沁dis州b以jon),其中O
0是实值参数.负二项分布的生成函数(罗nemting丘川ction)与特征函数(chalacte山tic fLInc-tion)分别由下二式定义: P(z)=Pr(l一qz)一r, f(r)=夕r(l一叮e“)一r,其中q=l一p.数学期望与方差分别等于;q/p与r打声.负二项分布的分布函数在k=O,1,…处的值,依下列关系式由刀分布(忱扭一曲tri加tion)函数在点p处的值所确定: F(k)=p{X
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