腾达试验仪器厂

　　一、钢筋残余变形测定仪产品简介：

　　■**标准JGJ107-2010《钢筋机械连接技术规程》规定，通过圆柱套筒机械连接的两根钢筋，在单向拉伸试验中，接头的变形性能等级是一级时要求：残余变形u0≤0.10mm（钢筋直径d≤Φ32mm）和u0≤0.14mm（钢筋直径d＞Φ32mm）。实际工作中测量到的残余变形一般在0.030mm至0.080mm之间。残余变形量很小。

　　■钢筋残余变形测试仪只有采用双侧引伸计测量得到的数据才是A准确的；

　　■双侧引伸计和钢筋之间只有采用弹性连接（例如：弹簧和皮筋套），这样测量得到的数据才是A可靠的。多次实验证明：采用机械式刚性连接虽然连接方便，但是测量的数据误差大，大于1%，重复性差，数据A靠，不能通过计量检定。

　　Product introduction:

　　■**The standard JGJ107-2010"Technical Specifications for the Mechanical Connection of Steel Bars"stipulates that in a unidirectional tensile test,the deformation performance level of the joint is required when the two steel bars are mechanically connected through a cylindrical sleeve:residual deformation u0≤0.10mm(rebar diameter d≤Φ32mm)and u0≤0.14mm(rebar diameter d>Φ32mm).The residual deformation measured in actual work is generally between 0.030mm and 0.080mm.The amount of residual deformation is small.

　　■The data of the steel bar residual deformation tester is accurate only when it is measured by a double-sided extensometer;

　　■Only elastic connection between extensometer and rebar(for example:spring and rubber band),the data obtained by this measurement is reliable.Many experiments have proved that although the mechanical rigid connection is convenient for connection,the measured data has a large error,greater than 1%,poor repeatability,data A is reliable,and cannot pass the measurement verification.

　　二、钢筋残余变形测定仪主要指标：

　　■满足标准：JGJ107-2010《钢筋机械连接技术规程》（2010.10.01实施）

　　■标定仪器：GWB-200B高精度引伸计标定器（量程0～25mm，分辨率0.0002mm）钢铁研究总院制造

　　■测量钢筋直径（mm）：φ5～φ40

　　■测量分辨值（mm）：0.001

　　■精度等级：1级

　　■数显表显示含义：

　　均值：表示PV1和PV2两路的平均值

　　PV1：表示A路引伸计变形测量值

　　PV2：表示**路引伸计变形测量值

　　Second,the main indicators of the residual deformation detector

　　■Meet the standard:JGJ107-2010"Technical Regulations for Mechanical Rebar Connections"(implemented on 2010.10.01)

　　■Calibration instrument:GWB-200B high precision extensometer calibrator(range 0~25mm,resolution 0.0002mm)Manufactured by Central Iron and Steel Research

　　■Diameter of reinforcement(mm):φ5～φ40

　　■Measurement resolution(mm):0.001

　　■Accuracy level:1 level

　　■The meaning of the digital display:

　　Mean:The average value of PV1 and PV2

　　PV1:the deformation measurement value of the A-channel extensometer

　　PV2:indicates the deformation measurement value of**road extensometer

　　三、钢筋残余变形测定仪主要特点：

　　■钢筋机械连接残余变形测试仪由两只高精度可变标距引伸计，灵敏度保持一致，组成双侧引伸计，直接测量试样的两侧平均变形量，测量结果准确；

　　■两只引伸计测量标距可调，范围50～260mm，量程5mm或10mm；

　　■四位三排两输入高精度数显表，电路部分采用24位A/D高精度IC芯片设计，实时显示两只引伸计的真实变形量，数值稳定可靠；

　　■数显表设置简单，带有密码锁设定功能，避免误操作改动设定值；

　　■双侧引伸计和钢筋之间采用弹性连接（例如：弹簧和皮筋套），试样夹持方便，使用寿命长；

　　■本仪器由**人员根据实际情况精心设计，结构合理，非常适合于建筑质检部门检测使用。

　　Third,the main characteristics of the steel bar residual deformation tester

　　■Residual deformation tester for mechanical connection of steel bars consists of two high-precision variable-gauge extensometers with the same sensitivity.It consists of two-sided extensometers,which directly measure the average deformation of the two sides of the sample,and the measurement results are accurate;

　　■The measurement distance of two extensometers is adjustable,ranging from 50 to 260mm,and the range is 5mm or 10mm;

　　■Four-digit,three-row,two-input high-precision digital display meter,the circuit part adopts 24-bit A/D high-precision IC chip design,real-time display of the real deformation of the two extensometers,and the values are stable and reliable;

　　■The digital display meter is simple to set and has a password lock setting function to avoid misoperation to change the setting value;

　　■The elastic connection between the extensometer on both sides and the steel bar(such as spring and rubber band cover)is convenient for sample clamping and long service life;

　　■This instrument is carefully designed by**personnel according to the actual situation,and the structure is reasonable,which is very suitable for testing and use by the building quality inspection department.

　　四、钢筋残余变形测定仪主要配置：

　　■可变标距引伸计两只；

　　■高精度数显表一台；

　　■常用工具附件一套；

　　■使用说明书一份；

　　■仪器包装箱一个（340×230×110mm）。

　　Fourth,the main configuration of the residual deformation detector

　　■Two variable gauge extensometers;

　　■One high-precision digital display meter;

　　■One set of commonly used tools;

　　■One instruction manual;

　　■Instrument packing box(340×230×110mm).