铰接板桥铰缝疲劳性能试验研究
|
摘要
为研究不同构造的铰接板桥铰缝的疲劳性能,采用深铰缝和浅铰缝两种形式的铰接板桥进行试验研究,通过对跨中铰缝顶底部混凝土的横向应变规律及铰缝内部横向连接钢筋的应变规律进行对比分析,对铰缝的疲劳性能进行研究。试验结果表明,在200万次疲劳荷载以前,由于疲劳幅值相对较小,随着疲劳次数的增加,完成一定疲劳循环后施加静载时铰缝混凝土及钢筋的应变值逐渐减小,应变值的变化趋于更加稳定。当疲劳次数超过200万次后,由于疲劳幅值的增加,疲劳荷载对浅铰缝的破坏产生较大的影响,而对深铰缝则未产生较明显的影响。因此,超过一定幅值疲劳荷载是造成浅铰缝破坏的一个主要因素,深铰缝构造的抗疲劳破坏性能要远好于浅胶缝构造的抗疲劳破坏性能。
For the research on fatigue performance of hinge joints with different structures,two hinged slab bridges with deep hinge joints and shallow hinge joints were adopted in the experiments.Based on the results of the transverse strains regularity of hinge joints at the middle span of hinged slab,the researches on the fatigue performance of the hinge joints were carried out.The transverse strains of hinge joints include the concrete transverse strain at the bottom and the top of hinge joints,and the transverse strain of the connection steels in hinge joints.The experimental results suggest that,within 2×106 times of fatigue load,due to the relatively small fatigue amplitudes,the concrete and reinforcement strain values of hinge joints decrease as static load applied after the fatigue cycle of certain numbers,with the increasing of fatigue cycle number,the changes of the strain values tend to be more stable.When the fatigue cycle number is more than 2×106 times,as the fatigue amplitudes increase,the influence on the damage of shallow hinge joints by fatigue load is great,but no obvious influence on deep hinge joints.Therefore,the fatigue load with certain fatigue amplitude is a major factor which causes the destruction of shallow hinge joints,and the fatigue damage resistance performance of deep hinge joints is much better than shallow hinge joints.
For the research on fatigue performance of hinge joints with different structures,two hinged slab bridges with deep hinge joints and shallow hinge joints were adopted in the experiments.Based on the results of the transverse strains regularity of hinge joints at the middle span of hinged slab,the researches on the fatigue performance of the hinge joints were carried out.The transverse strains of hinge joints include the concrete transverse strain at the bottom and the top of hinge joints,and the transverse strain of the connection steels in hinge joints.The experimental results suggest that,within 2×106 times of fatigue load,due to the relatively small fatigue amplitudes,the concrete and reinforcement strain values of hinge joints decrease as static load applied after the fatigue cycle of certain numbers,with the increasing of fatigue cycle number,the changes of the strain values tend to be more stable.When the fatigue cycle number is more than 2×106 times,as the fatigue amplitudes increase,the influence on the damage of shallow hinge joints by fatigue load is great,but no obvious influence on deep hinge joints.Therefore,the fatigue load with certain fatigue amplitude is a major factor which causes the destruction of shallow hinge joints,and the fatigue damage resistance performance of deep hinge joints is much better than shallow hinge joints.
引文
[1]易建国.混凝土简支梁(板)桥[M].北京:人民交通出版社,2006.
[2]刘培文,周卫,张君纬,等.公路小桥涵设计示例[M].北京:人民交通出版社,2005.
[3]俞博,叶见曙,张剑,等.装配式混凝土铰接板桥铰缝剪力计算[J].深圳大学学报理工版,2011,28(1):60-64.
[4]卫军,李沛,徐岳,等.空心板铰缝协同工作性能影响因素分析[J].中国公路学报,2011,24(2):29-33.
[5]项贻强,邢骋,邵林海,等.铰接预应力混凝土空心板梁桥的空间受力行为及加固分析[J].东南大学学报:自然科学版,2012,42(4):734-738.
[6]Tang Xian-xi,Xu Yue,Zhu Xin-yang,et al.Experimental research and numerical analysis of transverse strain of hinge joints in hinge plates[C]//2011International Conference on Electric Technology and Civil Engineering,IEEE,2011:324-327.
[7]Tang Xian-xi,Xu Yue,Zou Cun-jun,et al.Numerical analysis of reasonable hinge joints size of reinforced concrete hinged plates[J].Advanced Materials Research,2011,163-167:1180-1185.
[8]Tang Xian-xi,Xu Yue,Xu Zhi,et al.Experimental study of ultimate bearing capacity of hinged plates with different configuration hinge joints[J].Advanced Materials Research,2011,163-167:1186-1191.
[9]钱寅泉,周正茂,葛玮明,等.基于相对位移法的铰缝破损程度检测[J].公路交通科技,2012,29(7):76-81.
[10]潘钻峰,Chung C.Fu,吕志涛.装配式板桥的横向预应力设计[J].东南大学学报:自然科学版,2010,40(6):1264-1270.
[11]刘立新,汪小林,于秋波,等.疲劳荷载作用下部分预应力混凝土梁的挠度研究[J].郑州大学学报:工学版,2007,28(4):4-7.
[12]周绪红,林新元,谭冬莲,等.波纹钢腹板组合箱梁疲劳试验[J].中国公路学报,2010,23(4):33-38,69.
[13]Singh S,Singh A,Bajaj V.Flexural fatigue strength of hybrid fibrous concrete beams[J].Construction Materials,2012,165(2):99-110.
[14]Singh S P.Fatigue strength of hybrid steel-polypropylene fibrous concrete beams in flexure[J].Procedia Engineering,2011,14:2446-2452.
[15]唐先习,孙焕重,朱彦鹏,等.疲劳荷载作用下铰接板桥挠度试验[J].长安大学学报:自然科学版,2014,34(2):65-70.
[16]唐先习,梁金宝,唐先周,等.疲劳荷载作用下受压混凝土应变性能试验研究[C]//第22届全国结构工程学术会议论文集(2).乌鲁木齐,北京:《工程力学》杂志社,2013:108-112.
[2]刘培文,周卫,张君纬,等.公路小桥涵设计示例[M].北京:人民交通出版社,2005.
[3]俞博,叶见曙,张剑,等.装配式混凝土铰接板桥铰缝剪力计算[J].深圳大学学报理工版,2011,28(1):60-64.
[4]卫军,李沛,徐岳,等.空心板铰缝协同工作性能影响因素分析[J].中国公路学报,2011,24(2):29-33.
[5]项贻强,邢骋,邵林海,等.铰接预应力混凝土空心板梁桥的空间受力行为及加固分析[J].东南大学学报:自然科学版,2012,42(4):734-738.
[6]Tang Xian-xi,Xu Yue,Zhu Xin-yang,et al.Experimental research and numerical analysis of transverse strain of hinge joints in hinge plates[C]//2011International Conference on Electric Technology and Civil Engineering,IEEE,2011:324-327.
[7]Tang Xian-xi,Xu Yue,Zou Cun-jun,et al.Numerical analysis of reasonable hinge joints size of reinforced concrete hinged plates[J].Advanced Materials Research,2011,163-167:1180-1185.
[8]Tang Xian-xi,Xu Yue,Xu Zhi,et al.Experimental study of ultimate bearing capacity of hinged plates with different configuration hinge joints[J].Advanced Materials Research,2011,163-167:1186-1191.
[9]钱寅泉,周正茂,葛玮明,等.基于相对位移法的铰缝破损程度检测[J].公路交通科技,2012,29(7):76-81.
[10]潘钻峰,Chung C.Fu,吕志涛.装配式板桥的横向预应力设计[J].东南大学学报:自然科学版,2010,40(6):1264-1270.
[11]刘立新,汪小林,于秋波,等.疲劳荷载作用下部分预应力混凝土梁的挠度研究[J].郑州大学学报:工学版,2007,28(4):4-7.
[12]周绪红,林新元,谭冬莲,等.波纹钢腹板组合箱梁疲劳试验[J].中国公路学报,2010,23(4):33-38,69.
[13]Singh S,Singh A,Bajaj V.Flexural fatigue strength of hybrid fibrous concrete beams[J].Construction Materials,2012,165(2):99-110.
[14]Singh S P.Fatigue strength of hybrid steel-polypropylene fibrous concrete beams in flexure[J].Procedia Engineering,2011,14:2446-2452.
[15]唐先习,孙焕重,朱彦鹏,等.疲劳荷载作用下铰接板桥挠度试验[J].长安大学学报:自然科学版,2014,34(2):65-70.
[16]唐先习,梁金宝,唐先周,等.疲劳荷载作用下受压混凝土应变性能试验研究[C]//第22届全国结构工程学术会议论文集(2).乌鲁木齐,北京:《工程力学》杂志社,2013:108-112.