建筑图纸基础梁上部和下部钢筋锚固分别是多少?

2024-10-29 08:55:50
推荐回答(4个)
回答(1):

楼层的上翻梁和正位的梁一样

负筋锚固进入柱内≧0.4La+弯折15d或0.4LaE+弯折15d(抗震)

底筋锚固进入柱内≧0.4La+弯折15d或0.4LaE+弯折15d(抗震)

梁式筏基上翻梁 一般梁板端都挑出柱轴外,底筋、负筋到头都弯折15d。

正常梁的锚固长度如下所述:

框架梁:底筋进入支座内直锚长度满足≧Lah或LaE9(抗震)就采用直锚;如果直锚米长度不满足要求采用弯锚,弯锚的直线长度≧0.4La+弯折15d或0.4LaE+弯折15d(抗震)。

上部钢筋进入支座内直锚长度满足≧Lah或LaE9(抗震)就采用直锚;如果直锚米长度不满足要求采用弯锚,弯锚的直线长度≧0.4La+弯折15d或0.4LaE+弯折15d(抗震)。

扩展资料

在基础梁的现有计算方法中,较有代表性的是以下两种:

1、对墙下基础梁,现有观点认为,可视承台梁以上墙体为半无限平面弹性体,基础梁与墙体(半无限弹性体)共同变形,视基础梁为桩顶荷载作用下的倒置弹性地基梁,按弹性理论求解基础梁的反力,经简化后作为作用在基础梁上的荷载,然后按普通连续梁计算内力。

2、对柱下条形基础梁,现有观点认为,可视为弹性地基梁计算,即将桩顶反力作为集中力作用在梁上,柱为梁的支座,按普通连续梁分析其内力,桩顶反力按弹性地基架计算确定。

对于以上两种不同情况的基础梁,现有观点在计算过程中,均曾视其为弹性地基梁,所不同者,墙下基础梁视为倒置弹性地基梁,而柱下基础梁则视为弹性地基梁。但应指出的是,现有观点的以上处理方法,是与弹性地基梁的定义不符合的。

参考资料来源:百度百科-地梁

参考资料来源:百度百科-11G101-1

回答(2):

  1. 基础梁(JL)当端部有外伸时:

  ①  下部钢筋伸至尽端后弯折,从柱内侧算起直段长度≥La时,弯折长度12d;从柱内侧算起直段长度<La时,应满足≥0.4Lab,弯折长度15d。

  ② 上部钢筋无需全部伸至尽端,施工单位根据设计平法标注施工,连续通过的钢筋伸至外尽端后弯折12d ;在支座处截断的钢筋从柱内侧算起直段长度应≥La。

  2.   基础梁(JL)当端部无外伸时:

  ①  柱下条形基础基础梁(JL)下部钢筋可伸至尽端基础底板中锚固,从柱内侧算起直段长度≥La;当不能满足 以上要求时,从柱内侧算起直段长度应≥0.4Lab,并伸至杯尽端弯折,弯折长度15d。

  ②  梁板式筏形基础基础梁(JL)下部钢筋可伸至尽端后弯折,从柱内侧算起直段长度应≥0.4Lab,弯折长度15d。

  ③  上部钢筋全部伸至尽端后弯折, 从柱内侧算起直段长度应≥0.4Lab,并伸至板尽端弯折,弯折长度15d。当直段长度≥La时可不弯折。

  3.  梁板式筏形基中础基次梁(JCL)端部构造:

  ①  当端部有外伸时,下部钢筋伸至尽端后弯折,从支座内侧算起直段长度≥La时,弯折段长度12d ;从支座内侧算起直段长度<La时,直段长度当按铰接时应≥0.35Lab,当充分利用钢筋抗拉强度时应≥0.6Lab,弯折长度15d。上部钢筋无需全部伸至尽端,施工单位根据设计平法标注施工,连续通过的钢筋伸至外伸尽端后弯折12d ;在支座处截断的钢筋从支座内侧算起直段长度应≥La。

  ②  当端部无外伸时,下部钢筋全部伸至尽端后弯折15d,从支座内侧算起直段长度,当按铰接时≥0.35Lab,当充分利用钢筋抗拉强度时≥0.6Lab;上部钢筋伸入支座内12d,且至少过支座中线。

  13G101-11(G101系列图集施工常见问题答疑图解)

回答(3):

钢筋锚固长度,自己看图集才准确,网友答题有时马虎
基础梁无外伸时,伸至基础梁尽端弯折15d
基础梁有外伸时,且Ln'+hc≦La时,钢筋伸至端部后弯折15d;当>La时弯折12d(Ln'+hc=柱子内侧到基础梁尽端距离)
La可以查图集锚固长度表,都有对应

回答(4):

钢筋直径的35倍

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