直螺栓连接预制综合管廊节段承载力试验研究
|
摘要
通过对采用直螺栓连接的预制综合管廊整体试件进行试验,以研究带直螺栓接头的预制拼装综合管廊的受力性能、破坏形态等特点。试验结果表明,采用直螺栓连接的预制拼装综合管廊具有较好的受力性能。试验时管廊顶板受拉区混凝土首先开裂,出现弯曲裂缝,随着荷载增大,裂缝不断增大并最终发生弯剪破坏。破坏时管廊试件顶板及侧壁的跨中及角部的受拉钢筋屈服,而试件腋角处斜向受压钢筋尚处于弹性阶段。试件破坏时其承载力为设计承载力的1.91倍,结构具有较好的安全余量。
The specimen of prefabricated utility tunnel with straight bolt connections are tested to study the failure mode,mechanical properties and strain characteristics. The test results show that the prefabricated utility tunnel with straight bolt connection has well mechanical properties. In the experiment,the flexure cracks firstly appear in the tension area of the top plate of the tunnel,with the increasing of the load,the width of the cracks increase and finally the flexural and shearing failure occurs. The tensile steel bar in the middle span and corner of the top and side plate of the tunnel yield while the inclined compression steel bar in the haunch of the specimen is still in elastic stage. The ultimate bearing capacity is 1.91 times of the designed bearing capacity,and the structure has a good safety margin.
The specimen of prefabricated utility tunnel with straight bolt connections are tested to study the failure mode,mechanical properties and strain characteristics. The test results show that the prefabricated utility tunnel with straight bolt connection has well mechanical properties. In the experiment,the flexure cracks firstly appear in the tension area of the top plate of the tunnel,with the increasing of the load,the width of the cracks increase and finally the flexural and shearing failure occurs. The tensile steel bar in the middle span and corner of the top and side plate of the tunnel yield while the inclined compression steel bar in the haunch of the specimen is still in elastic stage. The ultimate bearing capacity is 1.91 times of the designed bearing capacity,and the structure has a good safety margin.
引文
[1]黄剑.预制拼装综合管廊研究和建设进展[J].特种结构,2018,35(1):1-11.
[2]薛伟辰,胡翔,王恒栋.上海世博园区预制预应力综合管廊力学性能试验研究[J].特种结构,2009,26(1):105-108+116.
[3]胡翔,薛伟辰.预制预应力综合管廊受力性能试验研究[J].土木工程学报,2010,43(5):29-37.
[4]马素.装配整体式综合管沟的试验及理论研究[D].济南:山东大学,2017.
[5]张帆,杨伟儒,肖立韬,等.直螺栓连接预制综合管廊接头预紧度试验研究[J].广东土木与建筑,2018,25(10):48-51.
[6]彭真.综合管廊节段模型足尺寸试验与有限元模拟[D].长沙:湖南大学,2017.
[7]Yang D J,Wang X.Study on Flexural Rigidity of Segment Joints in Metro Shield Tunnel[J].Applied Mechanics&Materials,2012:1716-1721.
[8]Hunt D V L,Nash D,Rogers C D F.Sustainable Utility Placement Via Multi-Utility Tunnels[J].Tunnelling and Underground Space Technology,2014,39:15-26.
[9]闫鑫雨,余村,翟世鸿.分片预制装配式管廊管片接头力学性能试验研究[J].四川建筑科学研究,2017,43(6):28-31.
[10]王述红,阿力普江·杰如拉,王鹏宇,等.预制矩形箱涵受力性能模拟及其潜在的破坏模式[J].东北大学学报(自然科学版),2018,39(2):260-265.
[11]混凝土结构设计规范:GB 50010-2002[S].北京:中国建筑工业出版社,2002.
[2]薛伟辰,胡翔,王恒栋.上海世博园区预制预应力综合管廊力学性能试验研究[J].特种结构,2009,26(1):105-108+116.
[3]胡翔,薛伟辰.预制预应力综合管廊受力性能试验研究[J].土木工程学报,2010,43(5):29-37.
[4]马素.装配整体式综合管沟的试验及理论研究[D].济南:山东大学,2017.
[5]张帆,杨伟儒,肖立韬,等.直螺栓连接预制综合管廊接头预紧度试验研究[J].广东土木与建筑,2018,25(10):48-51.
[6]彭真.综合管廊节段模型足尺寸试验与有限元模拟[D].长沙:湖南大学,2017.
[7]Yang D J,Wang X.Study on Flexural Rigidity of Segment Joints in Metro Shield Tunnel[J].Applied Mechanics&Materials,2012:1716-1721.
[8]Hunt D V L,Nash D,Rogers C D F.Sustainable Utility Placement Via Multi-Utility Tunnels[J].Tunnelling and Underground Space Technology,2014,39:15-26.
[9]闫鑫雨,余村,翟世鸿.分片预制装配式管廊管片接头力学性能试验研究[J].四川建筑科学研究,2017,43(6):28-31.
[10]王述红,阿力普江·杰如拉,王鹏宇,等.预制矩形箱涵受力性能模拟及其潜在的破坏模式[J].东北大学学报(自然科学版),2018,39(2):260-265.
[11]混凝土结构设计规范:GB 50010-2002[S].北京:中国建筑工业出版社,2002.