装配式空心板梁桥铰缝损伤评估方法
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摘要
目的推导一种装配式空心板桥铰缝损伤后跨中截面荷载横向分布系数的计算方法,解决装配式空心板梁桥铰缝损伤程度量化评估问题.方法基于传统铰接板梁法理论,以铰缝抗剪刚度的大小来表征铰缝的损伤程度,引入了一个空心板铰缝协同工作系数φ,并建立了其与铰缝抗剪刚度的模型关系以及与铰缝剪力抗力值、剪力效应值的功能函数关系,从而在正则方程中考虑铰缝损伤对荷载横向分布系数的影响,得到装配式空心板梁桥铰缝损伤的评估模型,计算其跨中截面荷载横向分布系数,并与实桥数据、有限元法(ANSYS)及传统铰接板梁法的计算结果进行对比.结果铰接板梁法计算结果与实桥数据相比其相对误差在5.9%～20.5%;ANSYS有限元法计算结果误差在2.7%～4.4%;修正铰接板梁法计算结果最大相对误差仅为2.7%.结论量化评估方法能够较好地适用于装配式空心板梁桥荷载横向分布系数的计算,计算结果与实桥数据较为接近,为实际工程中装配式空心板梁桥受力状况的评估可提供参考.
A method for calculating the transverse distribution coefficient of load on the mid-span section of an assembled hollow slab bridge with hinged joints damaged is deduced to solve the problem of quantitative evaluation of hinged joints damaged in an assembled hollow slab bridge.Based on the traditional theory of articulated slab-beam method,the damage degree of articulated joints is represented by the shear stiffness of articulated joints.A hollow slab articulated joint cooperative working coefficient is introduced,and its model relationship with the shear stiffness of articulated joints and its functional relationship with the shear resistance value and shear effect value of articulated joints are established.Considering the influence of hinged joint damage on load transverse distribution coefficient,the evaluation model of hinged joint damage of assembled hollow slab girder bridge is obtained,and the load transverse distribution coefficient of mid-span section is calculated.The results are compared with those of real bridge data,finite element method(ANSYS)and traditional hinged slab-girder method.Compared with the actual bridge data,the relative error of the calculated results of articulated plate-girder method is 5.9%～20.5%.The error of the calculated results of ANSYS finite element method is 2.7%～4.4%.The maximum relative error of the modified articulated plate-girder method is only 2.7%.Quantitative evaluation method can be well applied to the calculation of transverse load distribution coefficients of assembled hollow slab girder bridges.The calculated results are close to the actual bridge data,which can provide a reference for the evaluation of stress conditions of assembled hollow slab girder bridges in practical projects.
A method for calculating the transverse distribution coefficient of load on the mid-span section of an assembled hollow slab bridge with hinged joints damaged is deduced to solve the problem of quantitative evaluation of hinged joints damaged in an assembled hollow slab bridge.Based on the traditional theory of articulated slab-beam method,the damage degree of articulated joints is represented by the shear stiffness of articulated joints.A hollow slab articulated joint cooperative working coefficient is introduced,and its model relationship with the shear stiffness of articulated joints and its functional relationship with the shear resistance value and shear effect value of articulated joints are established.Considering the influence of hinged joint damage on load transverse distribution coefficient,the evaluation model of hinged joint damage of assembled hollow slab girder bridge is obtained,and the load transverse distribution coefficient of mid-span section is calculated.The results are compared with those of real bridge data,finite element method(ANSYS)and traditional hinged slab-girder method.Compared with the actual bridge data,the relative error of the calculated results of articulated plate-girder method is 5.9%～20.5%.The error of the calculated results of ANSYS finite element method is 2.7%～4.4%.The maximum relative error of the modified articulated plate-girder method is only 2.7%.Quantitative evaluation method can be well applied to the calculation of transverse load distribution coefficients of assembled hollow slab girder bridges.The calculated results are close to the actual bridge data,which can provide a reference for the evaluation of stress conditions of assembled hollow slab girder bridges in practical projects.
引文
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[8] 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.(QIAN Yinquan,ZHOU Zhengmao,GE Weiming,et al.Deterioration inspection of hinge joints based on relative displacement method [J].Journal of highway and transportation research and development,2012,29(7):76-81.)
[9] BAKHTIARI-NEJAD F,RAHAI A,ESFANDIARI A.A structural damage detection method using staticnoisy data[J].Engineering structures,2005,27(12):1784-1793.
[10] 成琛,沈成武,许亮.用铰接板(梁)法计算有损伤桥梁的横向分布系数[J].武汉理工大学学报(交通科学与工程版),2004,28(2):229-231.(CHENG Chen,SHEN Chengwu,XU Liang.The hinged-jointed plate method for calculating transverse load distribution on a damaged bridge [J].Journal of Wuhan university of technology(transportation science & engineering),2004,28(2):229-231.)
[11] 窦勇芝,王复明,蔡迎春.基于信赖域算法的板梁桥横向连接刚度的参数识别[J].结构工程师,2006(6):25-29.(DOU Yongzhi,WANG Fuming,CAI Yingchun.Parameter identification of transverse coupling stiffness for plate girder bridges based on trust region algorithm[J].Structural engineers,2006(6):25-29.)
[12] MABSOUT M E,TARHINI K M,FREDERICK G R.Finite element analysis of steel girder highway bridges[J].Journal of bridge engineering,1997,2(3):83-87.
[13] ALI R K,MIRZABOZORG H.Load distribution factors in simply supported skew bridges[J].Journal of bridge engineering,2004(5):55-57.
[14] 刘华,叶见曙,俞博,等.桥梁荷载横向分布系数计算方法[J].交通运输工程学报,2009,9(1):62-66.(LIU Hua,YE Jianshu,YU Bo,et al.Calculation method of transversal distribution factor for bridge load[J].Journal of traffic and transportation engineering,2009,9(1):62-66.)
[15] 聂瑞锋,石雪飞,阮欣,等.在役多车道空心板梁桥弯矩横向分布系数计算方法研究[J].桥梁建设,2014,44(2):56-60.(NIE Ruifeng,SHI Xuefei,RUAN Xin,et al.Research of calculation method for moment lateral distribution factors of multi-lane hollow slab beam bridges in service[J].Bridge construction,2014,44(2):56-60.)
[16] 刘沛林.装配式钢筋混凝土简支板梁桥铰缝受力性能研究[D].北京:清华大学,2010.(LIU Peilin.Study on behaviors of hinge joints for fabricated reinforced concrete simply-supported plate girder bridges[D].Beijing:Tsinghua University,2010.)
[17] 范立础.桥梁工程(上册)[M].北京:人民交通出版社,2014.(FAN Lichu.Bridge engineering(volume 1)[M].Beijing:China Communications Publishing,2014.)
[2] 邬晓光,钱若霖,苏佩.考虑湿接缝刚度损伤的桥梁荷载横向分布计算方法[J].铁道建筑,2018,58(1):93-95.(WU Xiaoguang,QIAN Ruolin,SU Pei.Calculation method of lateral load distribution of bridges considering wet joint stiffness damage [J].Railway engineering,2008,58(1):93-95.)
[3] 王凌波.在役预应力梁桥残余承载力评估方法研究[D].西安:长安大学,2011.(WANG Lingbo.Analysis for residual bearing capacity assessment method of in-service prestressed cncrete girder bridges[D].Xi′an:Chang′an University,2011.)
[4] 赵煜,周博,贺拴海,等.基于裂缝特征的PC简支梁损伤刚度评估方法[J].长安大学学报(自然科学版),2011,31(4):39-44.(ZHAO Yu,ZHOU Bo,HE Shuanghai,et al.Damage stiffness assessment method based on fracture characteristics of PC simply-supported beam[J].Journal of Chang ′an university(natural science edition),2011,31(4):39-44.)
[5] 于天来,李海生,赵云鹏,等.装配式铰接板桥的铰缝损伤评价[J].桥梁建设,2016,46(4):51-54.(YU Tianlai,LI Haisheng,ZHAO Yunpeng,et al.Damage evaluation of hinged joints of assembled hinged slab bridges[J].Bridge construction,2016,46(4):51-54.)
[6] 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.(WEI Jun,LI Pei,XU Yue,et al.Influencing factor analysis on coordinated working performance of hinge joint in hollow slab[J].China journal of highway and transport,2011,24(2):29-33.)
[7] 卫军,李沛,张国法,等.空心板铰缝结构耐用性能的试验研究[J].华中科技大学学报(自然科学版),2012,40(1):72-76.(WEI Jun,LI Pei,ZHANG Guofa,et al.Experimental study on durability performance of hollow slab hinged joints[J].Journal of Huazhong university of science and technology(natural science edition),2012,40(1):72-76.)
[8] 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.(QIAN Yinquan,ZHOU Zhengmao,GE Weiming,et al.Deterioration inspection of hinge joints based on relative displacement method [J].Journal of highway and transportation research and development,2012,29(7):76-81.)
[9] BAKHTIARI-NEJAD F,RAHAI A,ESFANDIARI A.A structural damage detection method using staticnoisy data[J].Engineering structures,2005,27(12):1784-1793.
[10] 成琛,沈成武,许亮.用铰接板(梁)法计算有损伤桥梁的横向分布系数[J].武汉理工大学学报(交通科学与工程版),2004,28(2):229-231.(CHENG Chen,SHEN Chengwu,XU Liang.The hinged-jointed plate method for calculating transverse load distribution on a damaged bridge [J].Journal of Wuhan university of technology(transportation science & engineering),2004,28(2):229-231.)
[11] 窦勇芝,王复明,蔡迎春.基于信赖域算法的板梁桥横向连接刚度的参数识别[J].结构工程师,2006(6):25-29.(DOU Yongzhi,WANG Fuming,CAI Yingchun.Parameter identification of transverse coupling stiffness for plate girder bridges based on trust region algorithm[J].Structural engineers,2006(6):25-29.)
[12] MABSOUT M E,TARHINI K M,FREDERICK G R.Finite element analysis of steel girder highway bridges[J].Journal of bridge engineering,1997,2(3):83-87.
[13] ALI R K,MIRZABOZORG H.Load distribution factors in simply supported skew bridges[J].Journal of bridge engineering,2004(5):55-57.
[14] 刘华,叶见曙,俞博,等.桥梁荷载横向分布系数计算方法[J].交通运输工程学报,2009,9(1):62-66.(LIU Hua,YE Jianshu,YU Bo,et al.Calculation method of transversal distribution factor for bridge load[J].Journal of traffic and transportation engineering,2009,9(1):62-66.)
[15] 聂瑞锋,石雪飞,阮欣,等.在役多车道空心板梁桥弯矩横向分布系数计算方法研究[J].桥梁建设,2014,44(2):56-60.(NIE Ruifeng,SHI Xuefei,RUAN Xin,et al.Research of calculation method for moment lateral distribution factors of multi-lane hollow slab beam bridges in service[J].Bridge construction,2014,44(2):56-60.)
[16] 刘沛林.装配式钢筋混凝土简支板梁桥铰缝受力性能研究[D].北京:清华大学,2010.(LIU Peilin.Study on behaviors of hinge joints for fabricated reinforced concrete simply-supported plate girder bridges[D].Beijing:Tsinghua University,2010.)
[17] 范立础.桥梁工程(上册)[M].北京:人民交通出版社,2014.(FAN Lichu.Bridge engineering(volume 1)[M].Beijing:China Communications Publishing,2014.)