钢筋

In order to meet the current rapid development of the construction industry, reinforced concrete structure of the growing number of situations, to meet the requirements of a large number of steel connections, my company and the Beijing Architecture Design and Research Institute of the success of research and development with international and domestic advanced level reinforced rib peeling rolling straight thread forming series of mechanical and connecting sleeve, bar straight screw connection technology has the following characteristics: 1, on the neutral good, stable performance, high joint strength.

为适应当前建筑业的迅速发展，钢筋混凝土结构日益增多的形势，满足大量钢筋连接的要求，我公司与北京建筑设计研究院成功研制、开发了具有国际国内先进水平的钢筋剥肋滚轧直螺纹成型系列机械和连接套筒，钢筋直螺纹连接技术具有以下特点： 1、对中性好、性能稳定、接头强度高。

The application and construction technology of full strength steel bar thread connection technology in control center works of Yellow River Division Project are discussed from reinforcement incision, assembling, reinforcement joint and other aspects.

从钢筋下料、钢筋套丝、钢筋连接几方面论述了等强钢筋螺纹连接技术在引黄控制调度中心应用中的施工工艺，指出此方法既保证了接头质量，又加快了施工进度，具有广泛的应用前景。

According to the national conditions of our country and the great changes of building construction market at present,some proposals concerning with the popularization of grade Ⅲ steel bar with strength of 400 MPa,developing the small diame...

根据我国国情及建筑市场的变化，提出了大力推广强度为 4 0 0MPa的Ⅲ级钢筋，发展小直径Ⅱ，Ⅲ级钢筋，优化或淘汰冷加工钢筋，发展与钢筋有关的配套技术等建议。可供建筑设计部门及治金企业参考。

The results show that BS 460MPa grade reinforced bar can be produced all from Q235 or 20MnSi billet by the remained heat treatment process but the production cost of the former is lower. When the water pressure minishes, the intensities of reinforced bar reduce; the higher the temperature at the entrance of cooling bed is, the lower the intensities are. Therefore, the commendatory process parameters are that five stages coolers should be opened, water pressure should be all 1.8～2.0MPa and the temperature at the entrance of cooling bed of Q235 reinforced bar should lower than 650℃. The typical microstructure(Q235): the surface layer is tempered sorbite; the transition layer is pearlite and ferrite, and the partial ferrite is acicular; the core is pearlite and ferrite and the grain fineness is 8～10 grade. The yield strength is reduced by 10～20MPa after natural ageing and it can be simulated by artificial ageing(100℃×2h or 200℃×1h).

结果表明，Q235和20MnSi钢都可以利用余热处理工艺生产出性能合格的钢筋，但前者的生产成本较低；水压减小，钢筋强度降低，上冷床温度越高，强度越低，推荐5段水冷器全开，水压均为1.8～2.0MPa，Q235钢筋的上冷床温度应控制在650℃以下；钢筋典型的金相组织（Q235）表层为回火索氏体，过渡层为珠光体+铁素体且部分铁素体呈针状，心部为珠光体+铁素体，晶粒度8～10级；自然时效后屈服强度下降10～20MPa，用人工时效可以模拟自然时效，工艺是100℃×2h或200℃×1h。

The iron array electrode covered with concrete as a new electrochemical technique is applied to map the potential imaging and to investigate on the iron electrode corrosion process under concrete: In Cl- solution the corrosion of the iron array electrode covered with concrete had been prevented for a short term since the concrete protection, but the corrosion still occurreed and developed after immersed for a long time.

由于混凝土的隔离和高绝缘性，常规的电化学技术、微探针扫描技术均难于获得在腐蚀介质的浸泡下混凝土/钢筋界面，特别是不同深处的混凝土/钢筋界面的电位分布。本文提出用阵列电极法并结合电子技术和微机控制技术，获得同一水平面上混凝土/钢筋界面以及不同深处的混凝土/钢筋界面的电位分布立体信息图。

The main type of the reinforced bar is HRB335, and the stirrup bar is HPB235.The foundation type of this structure is reinforced concrete individual foundation .

框架受力钢筋主要采用HRB335级钢筋，箍筋主要采用HPB235级钢筋；基础采用钢筋混凝土柱下独立基础。

Guangyu Construction Machinery Co., Ltd., founded in 1995 to the production of reinforcing steel cutting machine, bar bending machine, steel stirrup bending machine, bar Straightening machine, wipe-ray machine, impact rammer, as the main product.

光裕建筑机械有限公司，始建于1995年，以生产钢筋切断机、钢筋弯曲机、钢筋箍筋弯曲机、钢筋调直机、抹光机、冲击夯、为主要产品。

In fact, there are a lot of shortcomings such as beams and for larger cross-section of the beam, particularly steel-reinforced self-respect a lot, so the installation of steel beams in the beam must be installed after the end of the template, the beam side of the module should be installed in bars Complete collection experience and qualified after installation.

其实这样有很大的缺点，因为针对与梁截面面积较大的梁，钢筋特别密集，钢筋自重很大，所以在梁钢筋安装必须在梁底模板安装后进行，梁的侧模应在钢筋安装完毕并经验收合格后才安装。

In a market economy, enterprises must attach great importance to technological progress, and to take practical actions to achieve universal adoption of concrete admixtures; scored with ribbed steel bars of variable cross-section to replace the glossy steel as the production of prestressed Concrete products and reinforced concrete products, reinforced; concrete mixing system to the early realization of microcomputer control; by roll welding machine to replace the hand-made steel skeleton of banding; centrifugal molding, product testing, as well as a phase of water pressure of the pressurized pipe to achieve the conservation process of automatic control ; vigorously promote energy conservation, etc.

在市场经济条件下，企业必须高度重视技术进步，并采取可行的措施，尽快实现普遍采用混凝土外加剂；用带肋刻痕的变截面钢筋取代光面钢筋作为生产预应力混凝土制品和钢筋混凝土制品的配筋；混凝土搅拌系统要尽早实现微机控制；用滚焊机取代手工绑扎制作钢筋骨架；离心成型、产品水压检验以及一阶段制管的加压养护过程实现自动控制；大力推广节能养护窑等等。

Based on the multi-layer shell element model that is now widely used in the nonlinear analysis for the shear wall structure,different constitutive models of concrete and reinforcement are discussed in this paper.Selected in this discussion were two models:a new constitutive model for concrete,referred as microplane model,which could precisely simulate the nonlinear behaviors of concrete under complicated stress conditions,and a constitutive model for reinforcement,which could accurately modeling the hysteretic behaviors of the reinforcement.Some shear wall tests were analyzed to demonstrate the precision of the proposed model.

在适用于剪力墙结构非线性分析的分层壳墙单元模型基础上，对其中的混凝土本构模型和钢筋本构模型进行讨论，采用一种能较好的模拟混凝土在多轴复杂应力状态下特性的microplane模型和一种能够全面反映钢筋在往复载荷下各种复杂受力特性的钢筋本构模型，分别模拟混凝土和钢筋的力学行为特征。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。