钢筋混凝土的

ABSTRACT In this dissertation, the dynamic process, the constitutive relation and the action between reinforcing steel bar and the concrete are systematically studied on the basis of the former research.

本文在前人研究工作的基础上，对弹体侵彻、贯穿钢筋混凝土的动力学过程、本构模型和钢筋与混凝土之间的作用等问题进行了深入的研究。

Utilizing plane sectorial domain Hamilton system function via variable substitutes and eigenfunction expansion method, an analytical element is proposed in this paper for the crack analysis of reinforced concrete structures combining the bridging model and Dugdale model. Combined with finite element, nolinear crack problems of reinforced concrete structure can be analyzed.

利用平面扇形域哈密顿体系方程，通过分离变量法及共轭辛本征函数向量展开法，结合Dugdale模型和桥联力模型，推导了钢筋混凝土结构裂纹尖端的解析元列式，将此解析元与普通有限元结合，可用于分析钢筋混凝土的非线性断裂问题。

In the 20th cent. new forms of building have been devised, with the use of reinforced concrete and the development of geodesic and stressed-skin structures.

在20以上。新形式的建设已制订，使用钢筋混凝土的发展和大地测量，并强调皮肤结构。

Longitudinal reinforcement has been modeled with discrete element and stirrup has been modeled with smeared element. Smeared element, stirrup has been modeled using membrane element in or on concrete isoperimetric element. The constitutive relationship and failure criterion for concrete is the inter-facial model.

在建立钢筋混凝土的有限元模型时，混凝土采用的单元为八节点六面体等参单元，钢筋单元分为两种情况，纵向钢筋采用分离式钢筋单元，箍筋采用埋藏式钢筋单元，即箍筋作为附着在混凝土等参数单元内或单元上的"膜单元"。

Therefore, the author takes account the constructive features of the Reinforced Concrete structures to raise the concepts of identical and un-identical displacement field, and to establish new elements for plane and space RC structures, including plane quadrangle element with several tendons, plane triangle element with one tendon or several tendons, block element with several tendons and so on.

在深入研究已有钢筋混凝土组合与均匀二类单元，发现普遍存在没有充分考虑到钢筋实际作用的问题，从而导致了计算结果过于保守后，本文首先针对钢筋混凝土的构造特征，提出了同一位移场与非同一位移场的概念。

However,the mechanical properties of reinforced concrete is not available is very comprehensive,particularly in respect of concrete.

但是，对钢筋混凝土的力学性能掌握的还不是很全面，特别是混凝土。

The corrosion of steel reinforcing bars is always be a important problem in the Reinforced Concrete , especially when the RC structures are exposed to deteriorative environments , it could lead to corrosion of the reinforcing steel .

中文摘要钢筋腐蚀一直是传统钢筋混凝土的一个重要课题，尤其是在恶劣的腐蚀环境下，钢筋锈蚀会降低结构物的承载能力和寿命。

According to the similarity rule for the scale test, the experimentations of several scale projectiles perforating the RC targets are conducted.

按照相似准则对动能弹贯穿钢筋混凝土靶板进行了弹道试验研究，分析了钢筋混凝土的动态破坏特征，为数值模拟提供了可靠的试验数据。

The microstructure of the concrete is changed after FRT.

采用扫描电镜分析了混凝土的微观结构，结果表明，再碱化后，钢筋混凝土的粘结强度得到明显提高；电流、碳酸钠溶液浓度以及再碱化时间时再碱化后的粘结强度有显著影响；混凝土的微观结构发生了改变，孔隙率减小，有利于粘结强度的增加。

Current density, realkalisation time and concentration of sodium carbonate solution have significant effect on the bond strength after FRT.

采用拉拔试验，考虑到电流密度、再碱化时间、碳酸钠溶液浓度等因素研究了再碱化后钢筋混凝土的粘结强度。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。