华南理工大学学报（自然科学版）
華南理工大學學報（自然科學版）
화남리공대학학보（자연과학판）
JOURNAL OF SOUTH CHINA UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE EDITION)
2015年
4期
48-55
,共8页
桥梁工程%重载铁路%连续梁桥%小阻力扣件%适应性
橋樑工程%重載鐵路%連續樑橋%小阻力釦件%適應性
교량공정%중재철로%련속량교%소조력구건%괄응성
bridge engineering%heavy haul railway%continuous bridge%small-resistance fastener%adaptability
为研究小阻力扣件布置方案对重载铁路连续梁桥上无缝线路纵向力分布规律的影响，采用一种经过验证的梁轨相互作用分析方法，建立考虑相邻多跨简支梁结构的30 t轴重重载铁路（60＋100＋60） m连续梁桥－桥上无缝线路的一体化空间有限元模型．在此基础上，对多种小阻力扣件方案进行比选，探讨了扣件阻力、下部结构刚度、荷载模式、制动力率等设计参数的影响．研究结果表明：仅在连续梁范围内铺设小阻力扣件，可在保证钢轨应力和墩顶水平力均较小的同时减小钢轨断缝值；小阻力扣件纵向阻力取值对钢轨应力的影响可达11．2％；在连续梁范围内铺设小阻力扣件后，梁轨快速相对位移成为主要控制性指标，100 m跨重载连续梁桥制动墩顶纵向刚度限值为3000 kN／cm；荷载模式和制动力率对梁轨相对位移影响较大，建议通过试验进一步明确重载列车的制动力率取值．
為研究小阻力釦件佈置方案對重載鐵路連續樑橋上無縫線路縱嚮力分佈規律的影響，採用一種經過驗證的樑軌相互作用分析方法，建立攷慮相鄰多跨簡支樑結構的30 t軸重重載鐵路（60＋100＋60） m連續樑橋－橋上無縫線路的一體化空間有限元模型．在此基礎上，對多種小阻力釦件方案進行比選，探討瞭釦件阻力、下部結構剛度、荷載模式、製動力率等設計參數的影響．研究結果錶明：僅在連續樑範圍內鋪設小阻力釦件，可在保證鋼軌應力和墩頂水平力均較小的同時減小鋼軌斷縫值；小阻力釦件縱嚮阻力取值對鋼軌應力的影響可達11．2％；在連續樑範圍內鋪設小阻力釦件後，樑軌快速相對位移成為主要控製性指標，100 m跨重載連續樑橋製動墩頂縱嚮剛度限值為3000 kN／cm；荷載模式和製動力率對樑軌相對位移影響較大，建議通過試驗進一步明確重載列車的製動力率取值．
위연구소조력구건포치방안대중재철로련속량교상무봉선로종향력분포규률적영향，채용일충경과험증적량궤상호작용분석방법，건립고필상린다과간지량결구적30 t축중중재철로（60＋100＋60） m련속량교－교상무봉선로적일체화공간유한원모형．재차기출상，대다충소조력구건방안진행비선，탐토료구건조력、하부결구강도、하재모식、제동력솔등설계삼수적영향．연구결과표명：부재련속량범위내포설소조력구건，가재보증강궤응력화돈정수평력균교소적동시감소강궤단봉치；소조력구건종향조력취치대강궤응력적영향가체11．2％；재련속량범위내포설소조력구건후，량궤쾌속상대위이성위주요공제성지표，100 m과중재련속량교제동돈정종향강도한치위3000 kN／cm；하재모식화제동력솔대량궤상대위이영향교대，건의통과시험진일보명학중재열차적제동력솔취치．
In order to reveal the influence of the layout of small resistance fasteners on the distribution of longitudi-nal force loaded on the continuously-welded rail of continuous bridge of heavy haul railway, a recognized method to analyze the rail-bridge interaction is adopted, and a spatial integrated finite element model, which takes into con-sideration the adjacent multi-span simply-supported beams, is established to describe the continuously-welded rail of a (60+100+60)m continuous bridge of the heavy haul railway with an axle load of 30t.Afterwards, based on the comparison of some layout plans of small-resistance fasteners, the influences of such design parameters as fas-tener resistance, substructure stiffness, loading mode and braking force ratio are discussed.The results show that (1) when small-resistance fasteners are only laid on the continuous beam, the rail stress as well as the horizontal force at pier top is rather small, and the broken seam value of the rail can be reduced at the same time;(2) the in-fluence of longitudinal resistance of small-resistance fasteners on the rail stress is up to 11.2%;(3) when small-resistance fasteners are laid on the continuous bridge, the rapid displacement between the rail and the beam be-comes the main controlling index, and the longitudinal stiffness limit at the brake pier top of a 100 m-span continu-ous bridge reaches 3 000 kN/cm;and (4) both the loading mode and the braking force ratio greatly influence the displacement between the rail and the beam, so that an accurate braking force ratio should be determined by tests.
