现浇混凝土空心楼盖消防车等效均布荷载研究
|
摘要
建立了3种不同跨度且跨度范围为6～15m的3×3跨典型现浇混凝土空心楼盖结构模型,根据影响线原理分析出结构控制截面达到最不利内力时的消防车荷载布置方式,综合考虑覆土厚度、楼板跨度和消防车并行台数等3种因素的影响,采用有限元软件ABAQUS进行结构弹性受力分析,以荷载作用下控制截面的应力及结构变形为等效指标,得到了消防车的等效均布荷载值,并分析了3种因素对等效均布荷载值的影响规律。结果表明,消防车等效均布荷载值随着覆土厚度和楼板跨度的增大而减小,而消防车并行台数的增大使等效均布荷载值相应增大。研究成果可为简化大跨空心楼盖消防车荷载的计算提供参考,也可为荷载相关规范的修订提供依据。
Three types of typical cast-in-situ concrete hollow floor structures with different spans in which quantity of span is 3×3 and spans ranging from 6 to 15 m were established.According to the influence line principle, the layout of the fire engines loads were determined when the structural control section reached the most unfavorable internal force. Considering comprehensively the influence of three factors, such as the thickness of covering soil, the span of floor and the number of parallel fire trucks,etc, the finite element software ABAQUS was used to conduct elastic analysis of structure. Taking the stress and structural deformation of control section under load as equivalent indexes, the equivalent uniform load of fire engines was obtained, and the influence of three factors on the equivalent uniform load value was analyzed. The results show that the equivalent uniform load value of fire trucks decreases with the increase of cover soil thickness and floor span, while the equivalent uniform load value increases with the increase of parallel numbers of fire trucks. The research results can provide a reference for simplifying the load calculation of fire trucks with large-span hollow floor, and can also provide a basis for the revision of load-related codes.
Three types of typical cast-in-situ concrete hollow floor structures with different spans in which quantity of span is 3×3 and spans ranging from 6 to 15 m were established.According to the influence line principle, the layout of the fire engines loads were determined when the structural control section reached the most unfavorable internal force. Considering comprehensively the influence of three factors, such as the thickness of covering soil, the span of floor and the number of parallel fire trucks,etc, the finite element software ABAQUS was used to conduct elastic analysis of structure. Taking the stress and structural deformation of control section under load as equivalent indexes, the equivalent uniform load of fire engines was obtained, and the influence of three factors on the equivalent uniform load value was analyzed. The results show that the equivalent uniform load value of fire trucks decreases with the increase of cover soil thickness and floor span, while the equivalent uniform load value increases with the increase of parallel numbers of fire trucks. The research results can provide a reference for simplifying the load calculation of fire trucks with large-span hollow floor, and can also provide a basis for the revision of load-related codes.
引文
[1] 建筑结构荷载规范:GB 50009—2012[S].北京:中国建筑工业出版社,2012:30-167.
[2] DEEKS A J.Moment transfer factors for column-supported cast-in-situ hollow core slabs[J].Journal of Zhejiang University-Science A,2012,13(3):165-173.
[3] CHEN Y B,GONG D L,CHEN J M.The method of sandwich plate about thin-wall cast-in-site reinforced concrete hollow floor[J].Advanced Materials Research,2013,671-674(1):586-590.
[4] ZHAO K Z,WANG G Y.The experimental study on mechanical performance of multi-span column-supported assembly box concrete hollow floor[J].Applied Mechanics & Materials,2013,351-352:560-565.
[5] YANG W,YANG Y,YIN J,et al.Experimental study on mechanical property of stiffening-ribbed-hollowpipe reinforced concrete girderless floor with four clamped edges supported[J].Open Civil Engineering Journal,2013,7(1):170-178.
[6] BERNARDI P,CERIONI R,LEURINI F,et al.A design method for the prediction of load distribution in hollow-core floors[J].Engineering Structures,2016,123:473-481.
[7] FR??IL? E,KISS Z.Finite element analysis of hollow-core slabs[J].Journal of Applied Engineering Sciences,2016,6(1):29-33.
[8] KWAK H G,SONG J Y.Live load factors for parking garage members[J].Structural Safety,2000,22(3):251-279.
[9] WEN Y K,YEO G L.Design live loads for parking garages[J].Reston Va American Society of Civil Engineers,2001,127(3):280-289.
[10] 范重,鞠红梅,彭中华.消防车等效均布活荷载取值研究[J].建筑结构,2011,41(3):1-6.
[11] 王昕,胡达敏,李保忠,等.消防车等效均布活荷载参数化研究[J].建筑结构,2013,43(S2):364-370.
[12] DAI G,TIAN K.Research on reasonable value of live load for fire engine on all buried underground garage roof[J].Building Structure,2013(1):44-47.
[13] 苏雨.大跨度空心楼盖尺度及消防车等效均布荷载研究[D].重庆:重庆大学,2015.
[14] 王明,唐笑一,卫江华,等.高吨位消防车等效荷载取值研究[J].建筑结构,2016,46(8):28-32.
[15] 公路桥涵设计通用规范JT-GD60—2015[S].北京:人民交通出版社.2015.
[16] 城市园林绿化工程施工及验收规范:DB11/T 212—2009[S].北京:中国建筑工业出版社,2009.
[17] 城镇供热管网结构设计规范:CJJ 105—2005[S].北京:中国建筑工业出版社,2005.
[2] DEEKS A J.Moment transfer factors for column-supported cast-in-situ hollow core slabs[J].Journal of Zhejiang University-Science A,2012,13(3):165-173.
[3] CHEN Y B,GONG D L,CHEN J M.The method of sandwich plate about thin-wall cast-in-site reinforced concrete hollow floor[J].Advanced Materials Research,2013,671-674(1):586-590.
[4] ZHAO K Z,WANG G Y.The experimental study on mechanical performance of multi-span column-supported assembly box concrete hollow floor[J].Applied Mechanics & Materials,2013,351-352:560-565.
[5] YANG W,YANG Y,YIN J,et al.Experimental study on mechanical property of stiffening-ribbed-hollowpipe reinforced concrete girderless floor with four clamped edges supported[J].Open Civil Engineering Journal,2013,7(1):170-178.
[6] BERNARDI P,CERIONI R,LEURINI F,et al.A design method for the prediction of load distribution in hollow-core floors[J].Engineering Structures,2016,123:473-481.
[7] FR??IL? E,KISS Z.Finite element analysis of hollow-core slabs[J].Journal of Applied Engineering Sciences,2016,6(1):29-33.
[8] KWAK H G,SONG J Y.Live load factors for parking garage members[J].Structural Safety,2000,22(3):251-279.
[9] WEN Y K,YEO G L.Design live loads for parking garages[J].Reston Va American Society of Civil Engineers,2001,127(3):280-289.
[10] 范重,鞠红梅,彭中华.消防车等效均布活荷载取值研究[J].建筑结构,2011,41(3):1-6.
[11] 王昕,胡达敏,李保忠,等.消防车等效均布活荷载参数化研究[J].建筑结构,2013,43(S2):364-370.
[12] DAI G,TIAN K.Research on reasonable value of live load for fire engine on all buried underground garage roof[J].Building Structure,2013(1):44-47.
[13] 苏雨.大跨度空心楼盖尺度及消防车等效均布荷载研究[D].重庆:重庆大学,2015.
[14] 王明,唐笑一,卫江华,等.高吨位消防车等效荷载取值研究[J].建筑结构,2016,46(8):28-32.
[15] 公路桥涵设计通用规范JT-GD60—2015[S].北京:人民交通出版社.2015.
[16] 城市园林绿化工程施工及验收规范:DB11/T 212—2009[S].北京:中国建筑工业出版社,2009.
[17] 城镇供热管网结构设计规范:CJJ 105—2005[S].北京:中国建筑工业出版社,2005.