无缝桥梁加筋接线路面温度变形性能研究与施工要点分析
|
摘要
全无缝桥梁取消了桥梁伸缩缝,梁体的温度变形由台后的加筋接线路面来吸纳。加筋接线路面一般由基层+连续配筋层+沥青混凝土面层组成。在温降作用下,无缝桥加筋接线路面处在最不利的受拉状态,此时,梁体的变形转化成了连续配筋层中的若干条微小裂缝；在温升作用下,梁体的变形依靠加筋接线路面的弹性压缩予以吸收。本文以无缝桥带预压缝的加筋接线路面为研究对象,做了如下工作：
(1)介绍了目前无缝桥梁在国内外的研究概况,并在湖南大学桥梁工程研究所研究的无缝桥梁加筋接线路面的结构形式上加以改进,即在接线路面连续配筋层引入预压缝,并且阐述了这种带预压缝的加筋接线路面的结构形式和优点。
(2)研究了带预压缝加筋接线路面在温降作用下的受力特点和变形吸纳方式,建立起加筋接线路面的力学计算模型。推导了带预压缝加筋接线路面在受拉状态下的裂缝计算公式,并编制了相应的配筋计算程序。
(3)设计了带预压缝加筋接线路面的节段模型试验,通过对接线路面板模型的拉伸来模拟加筋接线路面在温降作用下的受拉状态。试验结果表明：带预压缝的加筋接线路面在温降作用下产生的裂缝能在预压缝处开裂发展,大大减小了加筋接线路面裂缝的离散性,并且裂缝宽度的实测值与理论计算吻合较好,验证了加筋接线路面裂缝推导公式的正确性。
(4)全无缝桥梁实际是一个主梁、搭板和加筋接线路面三者相互作用结构体系,因此对无缝桥梁施工提出的更高的要求。本文根据无缝桥梁的自身结构特点,总结了无缝桥梁中各部分的施工要点。
The expansion joints are canceled in the Jointless Bridges, while the thermal deformation produced in the superstructure can be absorbed by the reinforced approach pavement located behind the abutment, which consists of the base, the continuous reinforced layer and the asphalt concrete cover. Once the ambient temperature decreases, the reinforced approach pavement will have to bear an unfavorable tensile stress, in this case, the contraction generated in the main girder finally turns into some random slight cracks in the continuous reinforced layer. While in the opposite condition, the extension produced in the main girder ultimately results in the elastic compression of the continuous reinforced layer. In this dissertation, the following items are presented:
(1) Recent accomplishments in the research of Jointless Bridges at home and abroad are introduced. Based on the reinforced approach pavement proposed by Bridge engineering institute of Hunan University, an improvement is presented, which introduces pre-compaction seams into the continuous reinforced layer.
(2) An analytical model is developed, which perfectly describes the mechanical performance of the reinforced approach pavement suffered from ambient temperature drop. And formulas are derived to figure out the width of the cracks generated within the reinforced approach pavement implanted with pre-compaction seams. Furthermore, a program is developed to determine the required steel bars for the reinforced approach pavement to bear the thermal loads.
(3) A scale model test is conducted, in which the mechanical behavior of the reinforced approach pavement suffered from ambient temperature drop is simulated by axial extension of the model. The experimental results manifests that most of the induced cracks emerges right by the pre-compaction seams, which means that the randomness of them are enormously eliminated. At the same time, the measured values of the width of the induced cracks perfectly agree with the values given by the proposed formulas, it means that the formulas recommended by the author are valid and applicable.
(4) As the jointless bridge is a complicated system, in which the main girder, the approach slab, and the reinforced approach pavement interact with each other, it sets higher requirements for the construction procedure. Some key points of the construction technology, which deserves the attention of engineers, are summarized in this dissertation.
(1)介绍了目前无缝桥梁在国内外的研究概况,并在湖南大学桥梁工程研究所研究的无缝桥梁加筋接线路面的结构形式上加以改进,即在接线路面连续配筋层引入预压缝,并且阐述了这种带预压缝的加筋接线路面的结构形式和优点。
(2)研究了带预压缝加筋接线路面在温降作用下的受力特点和变形吸纳方式,建立起加筋接线路面的力学计算模型。推导了带预压缝加筋接线路面在受拉状态下的裂缝计算公式,并编制了相应的配筋计算程序。
(3)设计了带预压缝加筋接线路面的节段模型试验,通过对接线路面板模型的拉伸来模拟加筋接线路面在温降作用下的受拉状态。试验结果表明：带预压缝的加筋接线路面在温降作用下产生的裂缝能在预压缝处开裂发展,大大减小了加筋接线路面裂缝的离散性,并且裂缝宽度的实测值与理论计算吻合较好,验证了加筋接线路面裂缝推导公式的正确性。
(4)全无缝桥梁实际是一个主梁、搭板和加筋接线路面三者相互作用结构体系,因此对无缝桥梁施工提出的更高的要求。本文根据无缝桥梁的自身结构特点,总结了无缝桥梁中各部分的施工要点。
The expansion joints are canceled in the Jointless Bridges, while the thermal deformation produced in the superstructure can be absorbed by the reinforced approach pavement located behind the abutment, which consists of the base, the continuous reinforced layer and the asphalt concrete cover. Once the ambient temperature decreases, the reinforced approach pavement will have to bear an unfavorable tensile stress, in this case, the contraction generated in the main girder finally turns into some random slight cracks in the continuous reinforced layer. While in the opposite condition, the extension produced in the main girder ultimately results in the elastic compression of the continuous reinforced layer. In this dissertation, the following items are presented:
(1) Recent accomplishments in the research of Jointless Bridges at home and abroad are introduced. Based on the reinforced approach pavement proposed by Bridge engineering institute of Hunan University, an improvement is presented, which introduces pre-compaction seams into the continuous reinforced layer.
(2) An analytical model is developed, which perfectly describes the mechanical performance of the reinforced approach pavement suffered from ambient temperature drop. And formulas are derived to figure out the width of the cracks generated within the reinforced approach pavement implanted with pre-compaction seams. Furthermore, a program is developed to determine the required steel bars for the reinforced approach pavement to bear the thermal loads.
(3) A scale model test is conducted, in which the mechanical behavior of the reinforced approach pavement suffered from ambient temperature drop is simulated by axial extension of the model. The experimental results manifests that most of the induced cracks emerges right by the pre-compaction seams, which means that the randomness of them are enormously eliminated. At the same time, the measured values of the width of the induced cracks perfectly agree with the values given by the proposed formulas, it means that the formulas recommended by the author are valid and applicable.
(4) As the jointless bridge is a complicated system, in which the main girder, the approach slab, and the reinforced approach pavement interact with each other, it sets higher requirements for the construction procedure. Some key points of the construction technology, which deserves the attention of engineers, are summarized in this dissertation.
引文
[1]李扬海,程潮阳,鲍卫刚等.公路桥梁伸缩装置.北京：人民交通出版社,1999,62-97
[2]Rodofo F.Maruri,Samer H.Petro.Intergral abutments and jointless bridges(IAJB) 2004 survey summary. In:2005-FHWA Conference"Integral Abutment and Jointles Bridges (IAJB2005). Maryland,June4,2005,12-29
[3]Wolde-Tinsan.Intergral Abutment Bridge.长沙：湖南大学土木工程学院,内部资料,1986,1-55
[4]Vasant C.Mistry.Intergral abutment and jointless bridges. In:2005-FHWA Conference"Integral Abutment and Jointles Bridges (IAJB2005).Maryland, 2005,3-11
[5]李青春.整体式无缝桥梁桥台的概念设计辽宁交通科技,2004,20(6)：60-63
[6]G.P.Paterson.The UK deparment of transport view on integral bridges.In: Continuous and Integral Bridges,E&FN Spon,2-6 Boundary Row.London: B.P.Pritchard,1994,10-31
[7]Jeffrey Wetmore,P.E.Senior Projiect Manager, Edwards,et al.Case study-joint bridge beltrami countu state aid highway 33 over mississippi river in ten lake township,minnesota.In:The 2005-FHWA Conference"Integral Abutment and Jointles Bridges (IAJB2005)". Maryland,2005,84-96.
[8]NgCWW,Springman SM,Norrish A R M. Centrifuge modeling of spread-base integral bridges abutments. Journal of Geotechnical and Geoenvironmental Engineering, ASCE,1998,124(5):376-388
[9]Wasserman E P, Walker J H. Integral abutments for steel bridges,Highway structures design handbook. US A:American Iron and Steel Institute,1996,1-17
[10]Maruri R F, Petro S H. Integral Abutments and Jointless Bridges(IAJB) 2004 Survey Summary. In:The 2005 FHWA-Conference"Integral Abutment and Jointless Bridges (IAJB2005)".Maryland,2005,12-29
[11]辛济平等译.美国公路桥梁设计规范-荷载与抗力系数设计法.北京：人民交通出版社,1998,650-655
[12]小田阳康.桥梁伸缩装置的研究.日本：高速公路与汽车出版社,1987,10-25
[13]王伯惠.取消桥梁伸缩缝作法的新发展.见：1991年桥梁学术讨论会议论文集.北京：北京人民交通出版社,1991,90-96
[14]Clellon L. Loveall. Jointless bridge decks. Civil Engineering,1985,55(11): 64-67
[15]张亮,宁夏元.设置小边跨的无缝连续梁桥设计.中南公路工程,1998,23(2)：18-20
[16]洪锦祥,彭大文,永春县上坂大桥的设计—无缝伸缩缝桥梁的应用实践.福建建筑,2004,90(5)：50-52
[17]胡大琳,王天利,陈峰等.半整体式桥台无伸缩缝静力分析.交通运输工程,2006,6(1)：52-56,62
[18]王天利.半整体式桥台无缝桥梁研究：[长安大学博士论文].’西安：长安大学,2003：33-55
[19]马竟,金晓勤.我国第一座整体式全无缝桥梁—广东清远四九桥的设计思路.中南公路工程,2002,27(2)：32-34
[20]金晓勤,邵旭东,孙海宽.梁式桥新型桥台结构试验研究.中南公路工程,1998,23(3)：39-41
[21]A.Yannotti,S.Alamplli,H.White.New York State Departement of transportation's experience with integral abutment bridges. In:2005-FHWA Conference"Integral Abutment and Jointles Bridges (IAJB2005). Maryland,2005,41-49
[22]Saltan,A.A and Kukreti.Performance evaluation of intergral abutment bridges. Transportion Research Record,1992,1371:17-25
[23]David J.White,Sri Sritharan,Muhannad Suleiman,el.Dentification of the best practions for design,construction,and repair of bridge appraoches.Iowa DOT Project TR-481 final report. Iowa State University,Jan.2005,2-22
[24]金晓勤,邵旭东,陈华辉,林辉.湖南大学学报(自然科学版),2006,33(4),1-5
[25]滕智民.钢筋混凝土基本构件(第二版).北京：清华大学出版社,1997,303-331
[26]中华人民共和国建设部.混凝土结构设计规范(GB50010-2002).北京：中国建设工业出版社,2002,100-102
[27]中华人民共和国行业标准.公路钢筋混凝土及预应力混凝土桥涵设计规范(JTG D62-2004).北京：人民交通出版社,2004,60-61
[28]叶见曙.结构设计原理(第二版).北京：人民交通出版社,2005,189-195
[29]邓学钧,陈荣生.刚性路面设计(第二版).北京：人民交通出版社,2005,6,104-111,204-212
[30]黄仰贤(美).路面分析与设计.北京：人民交通出版社,1998,11-14,445-451
[31]中国人民共和国行业标准.公路水泥混凝土路面设计规范(JTG D40-2002).北京：人民交通出版社,2002,18-23
[32]沙庆林.高等级公路半刚性基层沥青路面.北京：人民交通出版社,1999：414-417,452-485
[33]金晓勤.新型全无缝桥梁体系设计与实验研究：[湖南大学博士学位论文].长沙：湖南大学,2007,1-50
[34]过镇海,时旭东.钢筋混凝土原理和分析.北京：清华大学出版社,2003,244-252
[35]王铁梦.工程结构裂缝控制.北京：中国建筑工业出版社,1997,151-153,363-366
[36]丁大均.钢筋砼构件抗裂度、裂缝宽度和刚度.南京：南京工学院出版社,1986,29-31
[37]刘炳文,杨明福,陈顶中.Visual Basic语言程序设计(修订版).北京：高等教育出版社,2003,155-170,190-194
[38]谢祥瑞.关于悬臂梁结构设计.舰船科学技术,2005,27(3)：12-15
[39]孙训方,方孝淑,关来泰.材料力学.北京：高等教育出版,2001,30-32
[40]肖益民,丁伯承.水泥混凝土路面与基层接触状况的研究.公路,2000,32-33
[41]陈华辉.新型半整体式无缝桥梁的试验研究：[湖南大学硕士学位论文].长沙：湖南大学,2006,1-25
[42]中华人民共和国行业标准.公路桥涵施工技术规范(JTJ 041-2000).北京：人民交通出版社,2000,296-272,76-85,148-149
[43]中华人民共和国行业标准.公路沥青路面设计规范(JTJ D50-2006).北京：人民交通出版社,2006,10-24
[44]中华人民共和国行业标准.公路沥青路面施工技术规范(JTG 040-2004).北京：人民交通出版社,2004,11-16,86
[45]中华人民共和国行业标准.公路路面基层施工技术规范(JTJ 034-2000).北京：人民交通出版社,2000,119-120
[46]中华人民共和国行业标准.公路水泥混凝土路面施工技术规范(JTG F34-2003).北京：人民交通出版社,2003,15,62-63
[2]Rodofo F.Maruri,Samer H.Petro.Intergral abutments and jointless bridges(IAJB) 2004 survey summary. In:2005-FHWA Conference"Integral Abutment and Jointles Bridges (IAJB2005). Maryland,June4,2005,12-29
[3]Wolde-Tinsan.Intergral Abutment Bridge.长沙：湖南大学土木工程学院,内部资料,1986,1-55
[4]Vasant C.Mistry.Intergral abutment and jointless bridges. In:2005-FHWA Conference"Integral Abutment and Jointles Bridges (IAJB2005).Maryland, 2005,3-11
[5]李青春.整体式无缝桥梁桥台的概念设计辽宁交通科技,2004,20(6)：60-63
[6]G.P.Paterson.The UK deparment of transport view on integral bridges.In: Continuous and Integral Bridges,E&FN Spon,2-6 Boundary Row.London: B.P.Pritchard,1994,10-31
[7]Jeffrey Wetmore,P.E.Senior Projiect Manager, Edwards,et al.Case study-joint bridge beltrami countu state aid highway 33 over mississippi river in ten lake township,minnesota.In:The 2005-FHWA Conference"Integral Abutment and Jointles Bridges (IAJB2005)". Maryland,2005,84-96.
[8]NgCWW,Springman SM,Norrish A R M. Centrifuge modeling of spread-base integral bridges abutments. Journal of Geotechnical and Geoenvironmental Engineering, ASCE,1998,124(5):376-388
[9]Wasserman E P, Walker J H. Integral abutments for steel bridges,Highway structures design handbook. US A:American Iron and Steel Institute,1996,1-17
[10]Maruri R F, Petro S H. Integral Abutments and Jointless Bridges(IAJB) 2004 Survey Summary. In:The 2005 FHWA-Conference"Integral Abutment and Jointless Bridges (IAJB2005)".Maryland,2005,12-29
[11]辛济平等译.美国公路桥梁设计规范-荷载与抗力系数设计法.北京：人民交通出版社,1998,650-655
[12]小田阳康.桥梁伸缩装置的研究.日本：高速公路与汽车出版社,1987,10-25
[13]王伯惠.取消桥梁伸缩缝作法的新发展.见：1991年桥梁学术讨论会议论文集.北京：北京人民交通出版社,1991,90-96
[14]Clellon L. Loveall. Jointless bridge decks. Civil Engineering,1985,55(11): 64-67
[15]张亮,宁夏元.设置小边跨的无缝连续梁桥设计.中南公路工程,1998,23(2)：18-20
[16]洪锦祥,彭大文,永春县上坂大桥的设计—无缝伸缩缝桥梁的应用实践.福建建筑,2004,90(5)：50-52
[17]胡大琳,王天利,陈峰等.半整体式桥台无伸缩缝静力分析.交通运输工程,2006,6(1)：52-56,62
[18]王天利.半整体式桥台无缝桥梁研究：[长安大学博士论文].’西安：长安大学,2003：33-55
[19]马竟,金晓勤.我国第一座整体式全无缝桥梁—广东清远四九桥的设计思路.中南公路工程,2002,27(2)：32-34
[20]金晓勤,邵旭东,孙海宽.梁式桥新型桥台结构试验研究.中南公路工程,1998,23(3)：39-41
[21]A.Yannotti,S.Alamplli,H.White.New York State Departement of transportation's experience with integral abutment bridges. In:2005-FHWA Conference"Integral Abutment and Jointles Bridges (IAJB2005). Maryland,2005,41-49
[22]Saltan,A.A and Kukreti.Performance evaluation of intergral abutment bridges. Transportion Research Record,1992,1371:17-25
[23]David J.White,Sri Sritharan,Muhannad Suleiman,el.Dentification of the best practions for design,construction,and repair of bridge appraoches.Iowa DOT Project TR-481 final report. Iowa State University,Jan.2005,2-22
[24]金晓勤,邵旭东,陈华辉,林辉.湖南大学学报(自然科学版),2006,33(4),1-5
[25]滕智民.钢筋混凝土基本构件(第二版).北京：清华大学出版社,1997,303-331
[26]中华人民共和国建设部.混凝土结构设计规范(GB50010-2002).北京：中国建设工业出版社,2002,100-102
[27]中华人民共和国行业标准.公路钢筋混凝土及预应力混凝土桥涵设计规范(JTG D62-2004).北京：人民交通出版社,2004,60-61
[28]叶见曙.结构设计原理(第二版).北京：人民交通出版社,2005,189-195
[29]邓学钧,陈荣生.刚性路面设计(第二版).北京：人民交通出版社,2005,6,104-111,204-212
[30]黄仰贤(美).路面分析与设计.北京：人民交通出版社,1998,11-14,445-451
[31]中国人民共和国行业标准.公路水泥混凝土路面设计规范(JTG D40-2002).北京：人民交通出版社,2002,18-23
[32]沙庆林.高等级公路半刚性基层沥青路面.北京：人民交通出版社,1999：414-417,452-485
[33]金晓勤.新型全无缝桥梁体系设计与实验研究：[湖南大学博士学位论文].长沙：湖南大学,2007,1-50
[34]过镇海,时旭东.钢筋混凝土原理和分析.北京：清华大学出版社,2003,244-252
[35]王铁梦.工程结构裂缝控制.北京：中国建筑工业出版社,1997,151-153,363-366
[36]丁大均.钢筋砼构件抗裂度、裂缝宽度和刚度.南京：南京工学院出版社,1986,29-31
[37]刘炳文,杨明福,陈顶中.Visual Basic语言程序设计(修订版).北京：高等教育出版社,2003,155-170,190-194
[38]谢祥瑞.关于悬臂梁结构设计.舰船科学技术,2005,27(3)：12-15
[39]孙训方,方孝淑,关来泰.材料力学.北京：高等教育出版,2001,30-32
[40]肖益民,丁伯承.水泥混凝土路面与基层接触状况的研究.公路,2000,32-33
[41]陈华辉.新型半整体式无缝桥梁的试验研究：[湖南大学硕士学位论文].长沙：湖南大学,2006,1-25
[42]中华人民共和国行业标准.公路桥涵施工技术规范(JTJ 041-2000).北京：人民交通出版社,2000,296-272,76-85,148-149
[43]中华人民共和国行业标准.公路沥青路面设计规范(JTJ D50-2006).北京：人民交通出版社,2006,10-24
[44]中华人民共和国行业标准.公路沥青路面施工技术规范(JTG 040-2004).北京：人民交通出版社,2004,11-16,86
[45]中华人民共和国行业标准.公路路面基层施工技术规范(JTJ 034-2000).北京：人民交通出版社,2000,119-120
[46]中华人民共和国行业标准.公路水泥混凝土路面施工技术规范(JTG F34-2003).北京：人民交通出版社,2003,15,62-63