钢筋

Triggering off the free oscillation of the reinforced bar by amplifying the triggering signal of the piezoelectric ceramic sensor by the emitter coupled oscillation circuit , we have measured the oscillation frequency of various reinforced bars, and then we can calculate the magnitude of the corresponding pre stressing force accor.

论述了振动法测量钢筋的预应力的新方法，振动触及压电陶瓷传感器产生的电信号，通过双稳态触发振荡电路，经放大后启动钢筋自由振动。根据弦线振动频率和所受张力之间的关系，测量出不同型号不同长度的各类钢筋的频率，从而得出对应钢筋的预应

Category III new steel (400 MPA rolled ribbed bar) straighten cutter, cold-rolled and twisted steel machinery, drawing spiral steel machinery, steel stripping rib straight thread rolling machine, concrete pipe machinery, and more varieties and more models available for users Choice, quality, reliable, affordable, timely service, the establishment of a sound quality management system to ensure product quality and stability control, and through the China Quality Certification Center certification.

新III级钢（400MPA热轧带肋钢筋）调直切断机，冷轧扭钢筋机械，冷拔螺旋钢筋机械，钢筋剥肋直螺纹滚丝机，混凝土制管机械，多品种多型号可供用户选择，质量可靠，价格低廉，售后服务及时，建立了完善的质量管理体系，确保产品质量得到稳定控制，并通过了中国质量认证中心的认证。

The paper also indicates that influence of vertical crack on reinforcement rustiness is smaller than lengthwise crack, concrete basicity, concrete carbonate and so on.

钢筋锈蚀是导致钢筋混凝土结构耐久性等级下降的主要原因之一，本文根据工程调查，分析了混凝土状况对钢筋锈蚀程度的影响，认为垂直裂缝对钢筋锈蚀的影响程度远小于纵向裂缝、混凝土碱度、碳化等其它因素。

It is pointed out that for construction and supervision companies, they should study related specification, and recheck the yieldstrength ratio during sampling detection for steel bars.

施工单位和质量监督部门对受力钢筋的屈强比值在认识上存在误区，认为钢筋强度越高质量越好，忽略了钢筋的变形性能在钢筋混凝土结构中的作用。

According to the three-dimensional finite element analysis, the graph of axis force on steel, the graph of Z displacement on steel and the graph of whole transmogrification on girder are drawn.

通过模型分析计算得出的结果，得到钢筋轴力的分布图，相应的钢筋Z向位移曲线和梁的整体变形图，钢筋应力及混凝土平均应力曲线图，最后根据分析结果推导出钢筋应力与荷载的关系公式。

This article, based on the analysis of the data from the experiment on"double concrete beams", has shown the availability of using the"ladderlike concrete fabric" or"double steel" after treatment, and it has explained its properties of strength, crack and deflection.

本文根据对&双钢筋混凝土&小梁的试验资料的分析，提出了在普通钢筋混凝土受弯构件中采用经过构造处理后形成的&梯格状钢筋网&即&双钢筋&的可行性。阐述了双钢筋构件的强度、裂缝及变形的特点。

Cracking patterns, streel bars's stress distribution and force-displacement curves at beams ends resulted from the experiments indicate that at location of plastic hinge area the main cracks developed sufficiently and the stress of steel bars was peak values, and no bonding failure of steel bars is found within core region of assemblies.

有限元分析所得裂缝分布、钢筋应力分布以及梁端力－位移曲线反映出，高强钢筋混凝土框架梁柱组合件在低周反复荷载作用下梁端塑性铰区裂缝开展充分，钢筋应力最大，核芯区内钢筋未发生粘结破坏。

Results of pulling test reveal that the nominal strength ratio of corroded hot-rolled steel bar over uncorroded one is approximately equal to the ratio of maximum residual sectional area over the uncorroded one.And the rupture extension ratio of corroded hot-rolled steel bar is exponentially decreased with the maximum sectional loss ratio.The effect of stress concentration caused by corrosion pits has a significant influence on the decrease of rupture extension ratio but it is ignorable on the nominal strength ratio.

实验结果表明：锈蚀钢筋与未锈钢筋的名义强度比可近似取锈后钢筋的最大残余面积率，受锈坑应力集中的影响甚微；锈蚀钢筋的断后延伸率随最大截面损失率呈指数下降，受锈坑应力集中的影响显著。

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华神机械&是专业制造&华神牌：井字架、提升机、钢筋切断机、钢筋调直切断机、钢筋弯曲机、箍筋成型机、钢筋对焊机、电焊机、卷扬机、砖瓦煤炭粉碎机、多功能滚动式弯管机等机械设备。

The durability of concrete structure in general air environment, including concrete carbonization mechanism and influencing factors, steel corrosion mechanism and influences to the structural mechanical performance, cracks of concrete caused by the expansion of corrosion and the relation between width of crack and amount of corrosion, and the life estimation of reinforced concrete structure. At the same time, the paper introduced durability paint for concrete of xichang Cable-stayed bridge.

一般大气环境下普通钢筋混凝土结构的耐久性，包括混凝土碳化机理及影响因素、钢筋锈蚀机理及对结构力学性能影响、混凝土锈胀开裂及裂缝宽度与锈蚀量之间的关系以及钢筋混凝土结构寿命评价等，并利用以上理论对西昌斜拉桥钢筋混凝土塔柱进行了预测分析。

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。