装配式混凝土梁钢套筒锚接接头抗弯性能研究
|
摘要
装配式结构凭借其施工质量有保障、生产效率高的优点发展迅速,但由于接头处受力的不连续性和不确定性,使得接头成为结构的薄弱环节。为了确保装配式结构安全推广和应用,采用模型试验和数值模拟相结合的方法,对混凝土梁钢套筒锚接接头的抗弯性能和破坏模式进行研究。结果表明:1)接头的受力过程分为线弹性、梁身混凝土开裂、钢筋与锚固胶滑移破坏等几个阶段; 2)接头最终的破坏形式是锚接钢筋与锚固胶之间的滑移破坏,结构破坏时钢筋应力接近其屈服强度,表明接头可以提供足够的锚固力; 3)可以采用黏聚力模型模拟钢套筒锚固接头抗弯受力过程,通过调整接头钢筋根数和直径可以满足不同截面大小的结构受力要求,可为该接头在装配式地下连续墙中的应用提供可能。
Prefabricated concrete structure has advantages of good construction quality and high production efficiency. However, because of discontinuous and uncertain stress at joint, the joint becomes the weak link of the structure. In order to guarantee the safe promotion and application of fabricated structure, by using the method that combined model test and numerical simulation, flexural behavior and failure mode of sleeve anchor joint are studied. The results show that:(1) The stress process of the joint can be divided into three stages, i.e. linear elasticity, cracking of beam concrete and sliding failure between steel bar and anchor adhesive.(2) The ultimate failure form of the joint is the sliding failure between anchor steel bar and anchor adhesive, and the stress of steel bar is close to its yield strength during structural failure, which indicates that the joint can provide sufficient anchoring force.(3) Cohesive model can be used to simulate the reinforced sleeve anchorage joint, and the number and diameter of steel bar can be adjusted to meet the structural stress requirements of different section sizes, which provides possibility for application of the joint in fabricated underground diaphragm wall.
Prefabricated concrete structure has advantages of good construction quality and high production efficiency. However, because of discontinuous and uncertain stress at joint, the joint becomes the weak link of the structure. In order to guarantee the safe promotion and application of fabricated structure, by using the method that combined model test and numerical simulation, flexural behavior and failure mode of sleeve anchor joint are studied. The results show that:(1) The stress process of the joint can be divided into three stages, i.e. linear elasticity, cracking of beam concrete and sliding failure between steel bar and anchor adhesive.(2) The ultimate failure form of the joint is the sliding failure between anchor steel bar and anchor adhesive, and the stress of steel bar is close to its yield strength during structural failure, which indicates that the joint can provide sufficient anchoring force.(3) Cohesive model can be used to simulate the reinforced sleeve anchorage joint, and the number and diameter of steel bar can be adjusted to meet the structural stress requirements of different section sizes, which provides possibility for application of the joint in fabricated underground diaphragm wall.
引文
[1] 薛伟辰,王东方.预制混凝土板、墙体系发展现状[J].工业建筑,2002,32(12):57.XUE Weichen,WANG Dongfang.Progress of precast concrete slab and wall systems[J].Industrial Construction,2002,32(12):57.
[2] 严薇,曹永红,李国荣.装配式结构体系的发展与建筑工业化[J].重庆建筑大学学报,2004,26(5):131.YAN Wei,CAO Yonghong,LI Guorong.Development of assembly-type RC structure and building industrialization[J].Journal of Chongqing Jianzhu University,2004,26(5):131.
[3] 韩超,郑毅敏,赵勇.钢筋套筒灌浆连接技术研究与应用进展[J].施工技术,2013,42(21):113.HAN Chao,ZHENG Yimin,ZHAO Yong.Research and application development of grout sleeve splicing for reinforcement[J].Construction Technology,2013,42(21):113.
[4] 郑永峰,郭正兴,孙志成.新型变形灌浆套筒连接接头性能试验研究[J].施工技术,2014,43(22):40.ZHENG Yongfeng,GUO Zhengxing,SUN Zhicheng.Experimental study of the behavior of grouted deformed pipe splice[J].Construction Technology,2014,43(22):40.
[5] 李晓芝,田稳苓,孙文君.钢筋植筋黏结锚固性能的拉拔试验研究[J].河北工业大学学报,2010,39(4):113.LI Xiaozhi,TIAN Wenling,SUN Wenjun.Pull-out test study of the bonding characteristics of installed steel bar in concrete[J].Journal of Hebei University of Technology,2010,39(4):113.
[6] 黄远,朱正庚,黄登,等.钢筋半套筒灌浆连接的静力拉伸试验研究[J].华南理工大学学报(自然科学版),2016,44(2):26.HUANG Yuan,ZHU Zhenggeng,HUANG Deng,et al.Investigation into half grout sleeve splicing for rebars via static tensile test[J].Journal of South China University of Technology (Natural Science Edition),2016,44(2):26.
[7] 刘昌永,王庆贺,王玉银,等.带钢接头的装配式钢筋混凝土梁受弯性能研究[J].建筑结构学报,2013,34(增刊1):208.LIU Changyong,WANG Qinghe,WANG Yuyin,et al.Flexural behavior of precast reinforced concrete beams with steel end connectors[J].Journal of Building Structures,2013,34(S1):208.
[8] 孙常海,程东辉,何国玉.新型装配式混凝土梁抗剪性能数值分析[J].山西建筑,2017,43(28):49.SUN Changhai,CHENG Donghui,HE Guoyu.Numerical analysis of shear performance of pure dry assembled concrete beams[J].Shanxi Architecture,2017,43(28):49.
[9] 苏会锋,李习伟,王臣.全装配式地铁车站结构接头抗弯承载能力试验研究[J].铁道学报,2016,38(9):118.SU Huifeng,LI Xiwei,WANG Chen.Experimental study of flexural capacity of joints of structure of metro station with prefabricated concrete structure[J].Journal of the China Railway Society,2016,38(9):118.
[10] 李兆平,王臣,苏会锋,等.预制装配式地铁车站结构榫槽式接头力学性能研究[J].中国铁道科学,2015,36(5):7.LI Zhaoping,WANG Chen,SU Huifeng,et al.Mechanical property of tenon-groove joints for metro station constructed by prefabricated structure[J].China Railway Science,2015,36(5):7.
[11] MOY S S J,TAYLER C.The effect of precast concrete planks on shear connector strength[J].Journal of Constructional Steel Research,1996,36(3):201.
[12] 曾东洋,何川.地铁盾构隧道管片接头抗弯刚度的数值计算[J].西南交通大学学报,2004,39(6):744.ZENG Dongyang,HE Chuan.Numerical simulation of segment joint bending stiffness of metro shield tunnel[J].Journal of Southwest Jiaotong University,2004,39(6):744.
[13] 张厚美.装配整体式双层衬砌接头荷载试验与结构计算理论:南水北调中线穿黄隧洞结构计算模型研究[D].上海:同济大学,2000.ZHANG Houmei.Research on the loading test and structural models of prefabricated segment reinforced by secondary lining[D].Shanghai:Tongji University,2000.
[14] 工程结构加固材料安全性鉴定技术规范:GB 50728—2011[S].北京:中国建筑工业出版社,2012.Technical code for safety appraisal of engineering structural strengthening materials:GB 50728-2011[S].Beijing:China Architecture and Building Press,2012.
[15] 混凝土结构设计规范:GB 50010—2010[S].北京:中国建筑工业出版社,2011.Code for design of concrete structures:GB 50010-2010[S].Beijing:China Architecture and Building Press,2011.
[2] 严薇,曹永红,李国荣.装配式结构体系的发展与建筑工业化[J].重庆建筑大学学报,2004,26(5):131.YAN Wei,CAO Yonghong,LI Guorong.Development of assembly-type RC structure and building industrialization[J].Journal of Chongqing Jianzhu University,2004,26(5):131.
[3] 韩超,郑毅敏,赵勇.钢筋套筒灌浆连接技术研究与应用进展[J].施工技术,2013,42(21):113.HAN Chao,ZHENG Yimin,ZHAO Yong.Research and application development of grout sleeve splicing for reinforcement[J].Construction Technology,2013,42(21):113.
[4] 郑永峰,郭正兴,孙志成.新型变形灌浆套筒连接接头性能试验研究[J].施工技术,2014,43(22):40.ZHENG Yongfeng,GUO Zhengxing,SUN Zhicheng.Experimental study of the behavior of grouted deformed pipe splice[J].Construction Technology,2014,43(22):40.
[5] 李晓芝,田稳苓,孙文君.钢筋植筋黏结锚固性能的拉拔试验研究[J].河北工业大学学报,2010,39(4):113.LI Xiaozhi,TIAN Wenling,SUN Wenjun.Pull-out test study of the bonding characteristics of installed steel bar in concrete[J].Journal of Hebei University of Technology,2010,39(4):113.
[6] 黄远,朱正庚,黄登,等.钢筋半套筒灌浆连接的静力拉伸试验研究[J].华南理工大学学报(自然科学版),2016,44(2):26.HUANG Yuan,ZHU Zhenggeng,HUANG Deng,et al.Investigation into half grout sleeve splicing for rebars via static tensile test[J].Journal of South China University of Technology (Natural Science Edition),2016,44(2):26.
[7] 刘昌永,王庆贺,王玉银,等.带钢接头的装配式钢筋混凝土梁受弯性能研究[J].建筑结构学报,2013,34(增刊1):208.LIU Changyong,WANG Qinghe,WANG Yuyin,et al.Flexural behavior of precast reinforced concrete beams with steel end connectors[J].Journal of Building Structures,2013,34(S1):208.
[8] 孙常海,程东辉,何国玉.新型装配式混凝土梁抗剪性能数值分析[J].山西建筑,2017,43(28):49.SUN Changhai,CHENG Donghui,HE Guoyu.Numerical analysis of shear performance of pure dry assembled concrete beams[J].Shanxi Architecture,2017,43(28):49.
[9] 苏会锋,李习伟,王臣.全装配式地铁车站结构接头抗弯承载能力试验研究[J].铁道学报,2016,38(9):118.SU Huifeng,LI Xiwei,WANG Chen.Experimental study of flexural capacity of joints of structure of metro station with prefabricated concrete structure[J].Journal of the China Railway Society,2016,38(9):118.
[10] 李兆平,王臣,苏会锋,等.预制装配式地铁车站结构榫槽式接头力学性能研究[J].中国铁道科学,2015,36(5):7.LI Zhaoping,WANG Chen,SU Huifeng,et al.Mechanical property of tenon-groove joints for metro station constructed by prefabricated structure[J].China Railway Science,2015,36(5):7.
[11] MOY S S J,TAYLER C.The effect of precast concrete planks on shear connector strength[J].Journal of Constructional Steel Research,1996,36(3):201.
[12] 曾东洋,何川.地铁盾构隧道管片接头抗弯刚度的数值计算[J].西南交通大学学报,2004,39(6):744.ZENG Dongyang,HE Chuan.Numerical simulation of segment joint bending stiffness of metro shield tunnel[J].Journal of Southwest Jiaotong University,2004,39(6):744.
[13] 张厚美.装配整体式双层衬砌接头荷载试验与结构计算理论:南水北调中线穿黄隧洞结构计算模型研究[D].上海:同济大学,2000.ZHANG Houmei.Research on the loading test and structural models of prefabricated segment reinforced by secondary lining[D].Shanghai:Tongji University,2000.
[14] 工程结构加固材料安全性鉴定技术规范:GB 50728—2011[S].北京:中国建筑工业出版社,2012.Technical code for safety appraisal of engineering structural strengthening materials:GB 50728-2011[S].Beijing:China Architecture and Building Press,2012.
[15] 混凝土结构设计规范:GB 50010—2010[S].北京:中国建筑工业出版社,2011.Code for design of concrete structures:GB 50010-2010[S].Beijing:China Architecture and Building Press,2011.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |