钢筋套筒灌浆连接件抗火性能研究
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摘要
目的研究高温条件下钢筋套筒灌浆连接件的连接性能,为采用钢筋套筒灌浆连接方式的装配式建筑在火灾后的性能评估提供理论依据.方法基于顺序耦合法和国际标准升温曲线ISO-834,采用ABAQUS软件对两种规格钢筋套筒灌浆连接构件的高温连接性能进行数值模拟.结果在轴向极限拉伸荷载作用下,当受火时间小于10 min时,灌浆料处于三向受压状态并形成较为明显的斜向受压带;当受火时间达到15 min时,部分灌浆料的最大主应力转变为拉应力;当受火时间大于30 min时,位于套筒中部的灌浆料逐渐转变为三向受拉状态,灌浆料斜向受压带随之消失,构件极限拉伸荷载仅为常温下的30%左右.结论随着受火时间的增加,钢筋套筒灌浆连接构件的极限拉伸荷载随之降低,且主要取决于灌浆料的应力状态.
The mechanical properties of steel sleeve grouting connector under high temperature condition was studied to provide reference for the after-fire structural performance evaluation of prefabricated buildings with steel sleeve grouting connector.Based on sequential-coupling method and international standard heating curve ISO-834,the ABAQUS numerical models of steel sleeve grouting connection members of two specifications were established,and the mechanical properties of steel sleeve grouting connector with different fire duration time were numerically analyzed.Under the action of axial ultimate tensile load,when the fire-exposure time is less than 10 min,the grouting material is in triaxial compression and forms a relatively obvious oblique compression zone.When the fire-exposure time reaches 15 min,the maximum-principal-stress of some grouting materials changes into tensile stress.When the fire-exposure time is greater than 30 min,the grouting material in the middle part of sleeve gradually turns into triaxial tensile state,and the inclined compression zone of grouting material gradually disappears,and the ultimate tensile load of steel sleeve grouting connector is only about 30% of that under normal temperature.The numerical result indicates that the ultimate tensile load of steel sleeve grouting connector decreases with the increase of fire duration time,mainly depending on the stress state of grouting material.
The mechanical properties of steel sleeve grouting connector under high temperature condition was studied to provide reference for the after-fire structural performance evaluation of prefabricated buildings with steel sleeve grouting connector.Based on sequential-coupling method and international standard heating curve ISO-834,the ABAQUS numerical models of steel sleeve grouting connection members of two specifications were established,and the mechanical properties of steel sleeve grouting connector with different fire duration time were numerically analyzed.Under the action of axial ultimate tensile load,when the fire-exposure time is less than 10 min,the grouting material is in triaxial compression and forms a relatively obvious oblique compression zone.When the fire-exposure time reaches 15 min,the maximum-principal-stress of some grouting materials changes into tensile stress.When the fire-exposure time is greater than 30 min,the grouting material in the middle part of sleeve gradually turns into triaxial tensile state,and the inclined compression zone of grouting material gradually disappears,and the ultimate tensile load of steel sleeve grouting connector is only about 30% of that under normal temperature.The numerical result indicates that the ultimate tensile load of steel sleeve grouting connector decreases with the increase of fire duration time,mainly depending on the stress state of grouting material.
引文
[1] PARK R.Seismic design and construction of precast concrete buildings in New Zealand[J].PCI journal,2002,47(5):60-75.
[2] LING J H,IZNI S I,GEORGE M.Feasibility study of grouted splice connector under tensile load[J].Construction and building materials,2015(83):154-162.
[3] ALI A S,AHMAD BAR,MOHD Z B J,et al.The relationship between interlocking mechanism and bond strength in elastic and inelastic segment of splice sleeve[J].Construction and building materials,2014(55):227-237.
[4] RAHMAN A B A,YOON L H,IBRAHIM I S,et al.Performance of grouted splice sleeves with tapered bars under axial tension[J].Applied mechanics and materials,2015(159):1176-1180.
[5] LAMPORT W B,JIRSA J O,YURA J A.Strength and behavior of grouted pile-to-sleeve connection[J].Journal of structural engineering,1991,117(8):2477-2498.
[6] AMIN E,TAKASHI Y,MAHER T.Grout-filled pipe splices for precast concrete construction[J].PCI journal,1995,40(1):82-93.
[7] ZHAO X L,GRUNDY P,LEE Y T.Grout sleeve connections under large deformation cyclic loading[C].Proceedings of fifth international society of offshore and polar engineering conference,2002.
[8] ELIYA H,GEORGE M.Non-proprietary bar splice sleeve for precast concrete construction[J].Engineer structures,2015,83:154-162.
[9] LING J H,ZUHAIRI A H.Performance of CS-sleeve under direct tensile load:part Ⅰ-failure modes[J].Malaysian journal of civil engineering,2008,20(1):89-106.
[10] 李锐,郑毅敏,赵勇.配置500MPa钢筋套筒灌浆连接预制混凝土柱抗震性能试验研究[J].建筑结构学报,2016,37(5):255-263.(LI Rui,ZHENG Yimin,ZHAO Yong.Experimental study on seismic behavior of prefabricated concrete columns with 500MPa steel sleeve grouting[J].Journal of building structures,2016,37(5):255-263.)
[11] 郑永峰,郭正兴,曹江.新型灌浆套筒的约束机理及约束应力分布[J].哈尔滨工业大学学报,2015,47(12):106-111.(ZHENG Yongfeng,GUO Zhengxing,Cao Jiang.Restriction mechanism and constrained stress distribution of new grouting sleeve[J].Journal of Harbin institute of technology,2015,47(12):106-111.)
[12] BEEBY A W.Safety of structures and a new approach to robustness[J].The structural engineer,1999,74(4):16-21.
[13] 王国庆.钢筋套筒灌浆连接高温性能试验研究[D].苏州:苏州科技大学,2017.(WANG Guoqing.Experiment study on connection behaviour of gout-filled pipe splices connector in high temperature[D].Suzhou:Suzhou University of Science and Technology,2017.)
[14] 宋晓勇.钢筋混凝土柱抗火性能分析与研究[D].长沙:湖南大学,2006.(SONG Xiaoyong.The analysis and research on fire resistance performance of reinforced concrete columns[D].Changsha:Hunan University,2006.)
[15] LIE T T,BAROS C.Method to calculate the fire resistance of circular reinforced concrete columns[J].ACI material journal,1991,88(12):84-91.
[16] 李引擎,马道贞,徐坚.建筑结构防火设计计算和构造处理[M].北京:中国建筑工业出版社,1991.(LI Yinqin,MA Daozhen,XU Jian.Fireproof design calculation and structural treatment of building structures[M].Beijing:China Building Industry Press,1991.)
[17] 过镇海,时旭东.钢筋混凝土的高温性能及其计算[M].北京:清华大学出版社,2003.(GUO Zhenhai,SHI Xudong.High temperature performance and calculation of reinforced concrete[M].Beijing:Tsinghua University Press,2003.)
[18] 胡海涛,董毓利.高温时高强混凝土强度和变形的试验研究[J].土木工程学报,2002,35(6):44-47.(HU Haitao,DONG Yuli.Experimental study on strength and deformation of high strength concrete at high temperature[J].China civil engineering journal,2002,35(6):44-47.)
[19] 周文君,刘永军,王雪.套筒灌浆钢筋高温抗拉性能数值模拟[J].水利与建筑工程学报,2016,14(5):170-176.(ZHOU Wenjun,LIU Yongjun,WANG Xue.Numerical simulation of high temperature tensile performance of sleeve grouting steelbar[J].Journal of water resources and architectural engineering,2016,14(5):170-176.)
[2] LING J H,IZNI S I,GEORGE M.Feasibility study of grouted splice connector under tensile load[J].Construction and building materials,2015(83):154-162.
[3] ALI A S,AHMAD BAR,MOHD Z B J,et al.The relationship between interlocking mechanism and bond strength in elastic and inelastic segment of splice sleeve[J].Construction and building materials,2014(55):227-237.
[4] RAHMAN A B A,YOON L H,IBRAHIM I S,et al.Performance of grouted splice sleeves with tapered bars under axial tension[J].Applied mechanics and materials,2015(159):1176-1180.
[5] LAMPORT W B,JIRSA J O,YURA J A.Strength and behavior of grouted pile-to-sleeve connection[J].Journal of structural engineering,1991,117(8):2477-2498.
[6] AMIN E,TAKASHI Y,MAHER T.Grout-filled pipe splices for precast concrete construction[J].PCI journal,1995,40(1):82-93.
[7] ZHAO X L,GRUNDY P,LEE Y T.Grout sleeve connections under large deformation cyclic loading[C].Proceedings of fifth international society of offshore and polar engineering conference,2002.
[8] ELIYA H,GEORGE M.Non-proprietary bar splice sleeve for precast concrete construction[J].Engineer structures,2015,83:154-162.
[9] LING J H,ZUHAIRI A H.Performance of CS-sleeve under direct tensile load:part Ⅰ-failure modes[J].Malaysian journal of civil engineering,2008,20(1):89-106.
[10] 李锐,郑毅敏,赵勇.配置500MPa钢筋套筒灌浆连接预制混凝土柱抗震性能试验研究[J].建筑结构学报,2016,37(5):255-263.(LI Rui,ZHENG Yimin,ZHAO Yong.Experimental study on seismic behavior of prefabricated concrete columns with 500MPa steel sleeve grouting[J].Journal of building structures,2016,37(5):255-263.)
[11] 郑永峰,郭正兴,曹江.新型灌浆套筒的约束机理及约束应力分布[J].哈尔滨工业大学学报,2015,47(12):106-111.(ZHENG Yongfeng,GUO Zhengxing,Cao Jiang.Restriction mechanism and constrained stress distribution of new grouting sleeve[J].Journal of Harbin institute of technology,2015,47(12):106-111.)
[12] BEEBY A W.Safety of structures and a new approach to robustness[J].The structural engineer,1999,74(4):16-21.
[13] 王国庆.钢筋套筒灌浆连接高温性能试验研究[D].苏州:苏州科技大学,2017.(WANG Guoqing.Experiment study on connection behaviour of gout-filled pipe splices connector in high temperature[D].Suzhou:Suzhou University of Science and Technology,2017.)
[14] 宋晓勇.钢筋混凝土柱抗火性能分析与研究[D].长沙:湖南大学,2006.(SONG Xiaoyong.The analysis and research on fire resistance performance of reinforced concrete columns[D].Changsha:Hunan University,2006.)
[15] LIE T T,BAROS C.Method to calculate the fire resistance of circular reinforced concrete columns[J].ACI material journal,1991,88(12):84-91.
[16] 李引擎,马道贞,徐坚.建筑结构防火设计计算和构造处理[M].北京:中国建筑工业出版社,1991.(LI Yinqin,MA Daozhen,XU Jian.Fireproof design calculation and structural treatment of building structures[M].Beijing:China Building Industry Press,1991.)
[17] 过镇海,时旭东.钢筋混凝土的高温性能及其计算[M].北京:清华大学出版社,2003.(GUO Zhenhai,SHI Xudong.High temperature performance and calculation of reinforced concrete[M].Beijing:Tsinghua University Press,2003.)
[18] 胡海涛,董毓利.高温时高强混凝土强度和变形的试验研究[J].土木工程学报,2002,35(6):44-47.(HU Haitao,DONG Yuli.Experimental study on strength and deformation of high strength concrete at high temperature[J].China civil engineering journal,2002,35(6):44-47.)
[19] 周文君,刘永军,王雪.套筒灌浆钢筋高温抗拉性能数值模拟[J].水利与建筑工程学报,2016,14(5):170-176.(ZHOU Wenjun,LIU Yongjun,WANG Xue.Numerical simulation of high temperature tensile performance of sleeve grouting steelbar[J].Journal of water resources and architectural engineering,2016,14(5):170-176.)