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首页 » 注册资格考试 » 2024年公路水运试验检测师考试 » 2024年桥隧试验检测考试 » [原创]桥梁复习资料(精华版)
happenyoung - 2007/2/3 16:23:00
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song2007 - 2007/2/4 11:22:00
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wangzhengzhan - 2007/2/5 10:04:00
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童星 - 2007/2/6 9:47:00

桥涵工程检测试验规程 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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一、桥涵工程试验检测的内容Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü
            

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1、施工准备阶段的试验检测项目 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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桥位放祥测量; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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钢材原材料试验; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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钢结构连接性能试验; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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预应力锚具、夹具和连接器实验; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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水泥性能试验; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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⑥ 混凝土粗细集料试验; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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⑦ 混凝土配合比试验; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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⑧ 砌体材料性能试验; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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台后压实标准试验; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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其它成品、半成品试验检测; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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2.施工过程中的试验检测 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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地基承载力试验检测; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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基础位置、尺寸和标高检测; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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钢筋位置尺寸和标高检测; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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钢筋加工检测; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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混凝土强度抽样试验; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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⑦ 桩基检测; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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⑧ 墩、台位置、尺寸和标高检测; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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⑨ 上部结构(构件)位置、尺寸检测; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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⑩ 预制构件张拉、运输和安装强度控制试验; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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11预应力张拉控制检测; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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12 桥梁上部结构标高、变形、内力(应力)监测; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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13支架内力、变形和稳定性监测; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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14钢结构连接加工检测 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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钢构件防护涂装检测。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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3.施工完成后的试验检测 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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①桥梁总体检测; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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②桥梁荷载试验; Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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③桥梁使用性能监测 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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二、桥涵工程试验检测的依据Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü
            

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公路桥位勘测设计规范(JTJ 062-91); Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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公路工程地址勘察规范(JTJ 064-98); Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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预应力用锻具、夹具和连接器(GB/T14370-93Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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公路桥梁预应力钢绞线用YM锚具、连接器规格系列(JT329.1-1997); Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

公路桥梁预应力钢绞线用锚具、连接器试验方法及检验规则(JT329.2-1997Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

三、桥涵质量等级评定的方法Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü
            

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1.桥涵质量等级评定单元的划分Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü
            

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“质量检评标准”按桥涵工程建设规模大小、结构部位和施工工序将建设项目划分为单位工程、分部工程和分项工程,逐级进行工程质量等级评定。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

2.工程质量评分方法 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

施工单位在各分项工程完工后,按照“质量检评标准”所列基本要求、实测项目和外观鉴定进行自检,填写“分项工程质量检验评定表”,提交完整、真实的自检资料,由监理工程师确认;质量监督部门根据抽查资料和确认的施工启检资料进行质量等级评定。工程质量评定的分项工程为基本评定单元,采用百分制进行评分;在分项工程评分的基础上,逐级计算各相应分部工程、单位工程的评分值和建设项伺中单位工程的优良率。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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3.工程质量等级评定方法 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

工程质量评定分为优良、合格和不合格三个等级,应按分项、分部、单位工程和建设项目逐级评定。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

1)分项工程质量等级评定 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

分项工程评分在85分以上者为优良;70分及以上、85分以下者为合格;70分以下者为不合格。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

经检查评为不合格的分项工程,允许进行加固、补强、返工或整修,当满足设计要求后,可以重新评定其质量等级,但只可复评为合格。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

2)分部工程质量等级评定 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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所属各项工程全部合格,其加权平均分达85分及以上,且所含主要分项工程全部评为优良时,则该分部工程评为优良;如分项工程全部合格,但加权平均分为85分以下,或加权平均分虽在85分以上,但主要分项工程未全部达到优良标准时,则该分部工程评为合格;如分项工程未全部达到合格标准时,则该分部工程评为不合格。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

3)单位工程质量等级评定 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

所属各分部工程全部合格,其加权平均分达85分及以上,且所含主要分部工程全部评为优良时,则该单位工程评为优良;如分部工程全部合格,但加权平均分为85分以下,或加权平均分虽在85分及以上,但主要分部工程未全部达到优良标准时,则该单位工程评为合格;如分部工程未全部达到合格标准时,则该单位工程为不合格。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

4)建设项目质量等级评定 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

所属单位工程全部合格且优良率在80%及以上时,则该建设项目评为优良;如单位工程全部合格,但优良率在80%以下时,则该建设项目评为合格;如单位工程未全部合格,则该建设项目评为不合格。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

四、石料力学性能试验方法Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü
    Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

1)石料单轴抗压强度试验(JTJ054-94)

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石料的单轴抗压强度,是指将石料(岩块)制备成50mm*50mm*50mm的正方体(或直径和高度均为50mm的圆柱体)试件,经吸水饱和后,在单轴受压并按规定的加载条件下,达到极限破坏时,单位承压面积的强度。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

试验时是用切石机或钻石机从岩石试样或岩芯中制取标准试件,用游标卡尺精确地测出受压面积,按规定方法浸水饱和后,放在压力机上进行试验,加荷速率为0.5~1.0MPa/sÛú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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6个试件试验结果的算术平均值作为抗压强度测定值,如6个试件中的2个与其他4个的算术平均值相差3倍以上时,则取试验结果相近的4个试件的算术平均值作为抗压强度测定值。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

另外,有显著层理的岩石,取垂直与平行于层理方向的试件各一组,取其强度平均值作为试验结果。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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2)石料磨耗率试验 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

磨耗性是石料抵抗撞击、剪切和摩擦等综合作用的性能,用磨耗率来定量描述它。石料磨耗试验有两种方法:我国现行试验规程(JTJ 054-94) 规定,石料磨耗试验以?式试验法为标准方法。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

洛杉矾式磨耗试验又称搁板式磨耗试验。该试验机是由一个直径为711mm、长为508mm的圆鼓和鼓中一个搁板所组成。试验用的试样是按一定规格组成的级配石料,总质量为5000g。当试样加入磨耗鼓的同时,加入12个钢球,钢球总质量为5000g。,磨耗鼓以30~33r/min的转速旋转,在旋转时,由于搁板的作用,可将石料和钢球带到高处落下。经旋转500次后,将石料试样取出,用2mm圆孔筛筛去石屑,并洗净烘干称其质量。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

取两次平行试验结果的算术平均值作为测定值,当采用洛杉矾式方法时,两次试验误差应不大于2%,否则须重新试验。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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五、混凝土收缩、徐变测试方法。Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü
            

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收缩的测定。在工程应用中,通常是测定以干缩为主的总收缩值。按我国现行行业标 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

准(JTJ053-94)中T0526-94 规定,是用1oommxloommx515mm试件,经3d标准养护后,在温度为202,相对湿度为(605)%条件下,测定3d7d14d28d60d90d180d等不同龄期的收缩值。Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü
            

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对预应力混凝土桥梁构件而言、为降低徐变可采取下列措施:①选用小的水灰比,并保证潮湿养生条件,使水泥充分水化,形成密实结构的水泥石;②选用级配优良的集料,并作较高的集浆比,提高混凝土的弹性模量;③选用快硬高强水泥,并适当采用早强剂,提高混凝土早期强度;④推迟预应力张拉时间。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

六、钢筋试验检测Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü
            

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钢筋常规抽验项目及基本方法 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

1)屈服强度和抗拉强度 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

钢筋拉伸试验在试验机上进行时,当测力度盘的指针停止转动后恒定负载或第一次回转的最小负荷即为所求屈服点的荷载。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

屈服强度(σS)以MPa表达,井按下式计算。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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式中:Fs——相当于所求屈服应力时的荷载,NÛú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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A0——试件原截面面积,mm2Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

中碳钢和高碳钢没有明显的屈服点,采用分级加荷,求出弹性直线段相应于小等级负荷的平均伸长增量,由此计算出偏离直线段后各级负荷的弹性伸长。从总伸长中减去弹性伸长即为残余伸长。通常以残余伸长0.2%的应力作为屈服强度,表示为σ0.2,并按下式计算。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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式中: F0.2——相当于所求应力的荷载,NÛú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

A0Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü
        
试件原横截面积,mm2Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

抗拉强度是向试件连续加荷直至拉断,由测力度盘或拉伸曲线上读出最大负荷Fb,抗拉强度(σb)以MPa表达,按下式计算。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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式中:FbÛú¦šë×ùyA bbs.3c3t.comŸÒëjîü
        
一式件拉断前的最大荷载,NÛú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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A0——试件原横截面积,mm2Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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2)塑性 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

工程中钢材塑性指标通常用伸长率和断面收缩率表示,钢筋一般可进行伸长率单项抽验,当试件拉断后标距长度的增量与原标距长度之比的百分率即为伸长率,伸长率(δ)以%表达,并按下式计算: Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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式中:L1一一试件拉断后标距部分的长度,mmÛú¦šë×ùyA bbs.3c3t.comŸÒëjîü
            

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L0一一试件原标距长度,mmÛú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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n一一Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü
        
长、短比例试件的伸长率分别以δ5Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü
        
、δ10表示,定标距试件伸长率应附该标距长度数值的角注,如L100mm200mm则(伸长率分别以δ100 、δ200表示之。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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3)冷弯性能试验 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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它是钢筋在常温条件下进行的一项工艺性试验。用于检验钢材试件环绕弯心弯曲至规定 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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角度是否有裂纹、起层或断裂等现象,若无则认为合格。如钢材含碳、磷量较高或受过不正常的热处理,则冷弯试验往往不能合格。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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钢筋及预应力钢丝弯曲是以其规定的弯心半径、弯曲角度和反复弯曲次数,采用弯曲机或圆口台钳等设备进行。弯心半径与钢筋的直径有关,选择不当对弯曲试验的结果影响甚大。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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4)钢筋的接头及加工允许偏差检测Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü
            

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钢筋接头一般应采用焊接,螺纹筋可采用挤压套管接头。钢筋的纵向焊接应优选闪光对焊,也可采用电弧焊(帮条焊、搭接焊、熔槽帮条焊等)。 Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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钢筋接头的检验)焊接前必须根据施工条件进行试焊,按不同的焊接方法至少抽取每组3个试样进行基本力学性能检验。Ûú¦šë×ùyA bbs.3c3t.comŸÒëjîü

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