高性能复合砂浆薄层加固RC梁的耐火极限试验研究

陈大川; 罗杰; 尚守平

doi:10.13204/j.gyjz200906024

高性能复合砂浆薄层加固RC梁的耐火极限试验研究

doi: 10.13204/j.gyjz200906024

1.
1. 湖南大学土木工程学院,长沙 410082;
2.
2. 湖南省建工集团第二工程有限公司,长沙 410000

基金项目:

湖南省自然科学基金项目(20063137426);湖南省科技厅科技计划重点项目(06sk4057)

详细信息

作者简介:
陈大川，男，1967年8月出生，副教授。E-mail:10-roger@126.com

计量
- 文章访问数: 74
- HTML全文浏览量: 4
- PDF下载量: 71
- 被引次数: 0
出版历程
- 收稿日期: 2009-01-08
- 刊出日期: 2009-06-20

EXPERIMENTAL INVESTIGATION ON DURATION OF FIRE RESISTANCE OF RC BEAM REINFORCED WITH HIGH-PERFORMANCE FERROCEMENT LAMINATE

1.
1. Civil Engineering College,Hunan University,Changsha 410082,China;
2.
2. No. 2 Engineering Co. ,LTD,Hunan Construction Engineering Group Corporation,Changsha 410000,China

摘要

摘要: 高性能复合砂浆钢筋网薄层(简称HPFL)加固混凝土构件是一种新型的加固方法，该方法采用的高性能复合砂浆为无机材料，具有众多优良特点。为研究HPFL加固RC梁在高温-外力共同作用时剪切销钉对界面粘结性能的影响，对6根三面U形(在梁的受拉面和侧面进行加固)加固RC梁进行了高温试验，所有加固试件分为三组，第一组两根试件未植入剪切销钉，第二组两根试件植入剪切销钉，剪切销钉间距较大，第三组两根试件也植入剪切销钉，剪切销钉间距较小。试验后，比较它们的耐火极限、跨中挠度和破坏形态，分析界面在高温时的破坏机理。试验结果说明：植入剪切销钉可以非常显著地改善界面在高温时的粘结性能，试件在高温时的耐火性能得到很大的提高。
- 高性能复合砂浆 /
- 混凝土梁 /
- 植筋锚固
Abstract: High-performance ferrocement laminate(HPFL) is a new method to reinforce RC component.It adopts HPFL as inorganic material,and possesses numerous merits.In order to study the shear pins' impact on the interfacial bonding properties at high-temperatures,the test include 6 RC beams strengthened with U-shaped HPFL (ferrocement was put onto the tension face and two profile faces) and 1 reference RC beam.All the beams strengthened with U-shaped HPFL are divided into three groups.The two beams strengthened with U-shaped HPFL in the first group without implanting shear pins.However,the two beams strengthened with U-shaped HPFL in the second group with shear pins by larger spacing.And the last two beams strengthened with U-shaped HPFL in the third group are also implanted with shear pins by smaller spacing.After the test,there is a comparison of their duration of fire resistance,deflection and destruction mode,and an analysis of the interface's failure mechanism is done at high-temperature.The results show that the implanted shear pin can significantly improve the interfacial bonding properties at high-temperature,and the strengthened beams' fire resistance at high-temperature has been greatly improved.
- high-performance ferrocement laminate /
- RC beams /
- anchorage by implanting rebar

HTML全文

参考文献(10)

尚守平,龙凌宵,曾令宏.销钉在钢筋网复合砂浆加固混凝土构件中的性能研究[J].建筑结构,2006,36(3):10-12;

[2] 蒋隆敏,尚守平,黄政宇.一种适用于钢丝(筋)网水泥加固RC结构的纤维增强复合砂浆和界面剂[J].土木工程学报,2005,38(5):41-47;

[3] 尚守平,曾令宏,彭晖,等.复合砂浆钢丝网加固RC受弯构件的试验研究[J].建筑结构学报,2003,24(6):87-91;

[4] 尚守平,蒋隆敏,张毛心.钢筋网水泥复合砂浆加固RC偏心受压柱的试验研究[J].建筑结构学报,2005,26(2):18-33;

[5] 罗利波,尚守平.复合砂浆钢筋网加固混凝土梁抗剪计算模型探讨[J].科学技术与工程,2006,6(6):788-790;

[6] 颜军,尚守平,聂旭.高性能复合砂浆高温后的抗压强度试验研究[J].铁道科学与工程学报,2006,3(4):59-62;

[7] 李卫,过镇海.高温下混凝土的强度和变形性能试验研究[J].建筑结构学报,1993,14(1):8-16;

[8] 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;

[9] Chan Y N,Luo X,Sun W.Compressive Strength and Pore Structureof High Performance Concrete after Exposure to High Temperature Upto 800℃[J].Cement and Concrete Research,2000,30(2):247-251;

[10] Shirley Scott T.Fire Endurance of High Strength Concrete Slabs[J].ACI Materials Journal,1988,85(2):102-108.

施引文献

资源附件(0)

访问统计