铁道建筑
鐵道建築
철도건축
RAILWAY ENGINEERING
2015年
1期
31-35
,共5页
碳纤维板%重载铁路%钢筋混凝土板梁%体外预应力%加固
碳纖維闆%重載鐵路%鋼觔混凝土闆樑%體外預應力%加固
탄섬유판%중재철로%강근혼응토판량%체외예응력%가고
Carbon fiber plate%Heavy haul railway%Reinforcement concrete slab girder%External prestressing%Reinforcement
迄今，预应力碳纤维板应用于重载铁路钢筋混凝土梁加固改造的实例较少，其加固效果尚需深入研究。本文先阐述了体外预应力加固钢筋混凝土构件的设计思路，又根据现行铁路规范对加固前后梁体的应力、挠度及裂缝宽度进行了检算，并通过试验场内的静载试验验证了预应力碳纤维板加固钢筋混凝土板梁的加固效果。研究结果表明，采用预应力碳纤维板加固钢筋混凝土梁能够显著提高梁体受力性能，在1.2倍ZH荷载作用下能够满足运营要求，该技术可以在重载铁路加固改造中推广应用。
迄今，預應力碳纖維闆應用于重載鐵路鋼觔混凝土樑加固改造的實例較少，其加固效果尚需深入研究。本文先闡述瞭體外預應力加固鋼觔混凝土構件的設計思路，又根據現行鐵路規範對加固前後樑體的應力、撓度及裂縫寬度進行瞭檢算，併通過試驗場內的靜載試驗驗證瞭預應力碳纖維闆加固鋼觔混凝土闆樑的加固效果。研究結果錶明，採用預應力碳纖維闆加固鋼觔混凝土樑能夠顯著提高樑體受力性能，在1.2倍ZH荷載作用下能夠滿足運營要求，該技術可以在重載鐵路加固改造中推廣應用。
흘금，예응력탄섬유판응용우중재철로강근혼응토량가고개조적실례교소，기가고효과상수심입연구。본문선천술료체외예응력가고강근혼응토구건적설계사로，우근거현행철로규범대가고전후량체적응력、뇨도급렬봉관도진행료검산，병통과시험장내적정재시험험증료예응력탄섬유판가고강근혼응토판량적가고효과。연구결과표명，채용예응력탄섬유판가고강근혼응토량능구현저제고량체수력성능，재1.2배ZH하재작용하능구만족운영요구，해기술가이재중재철로가고개조중추엄응용。
T here were few applications of prestressed carbon fiber plate in reinforcement of reinforced concrete girders used in heavy haul railway. In the paper,the design idea of external prestressing used in concrete girders reinforcement was introduced,and the stress,deflection and crack width of the girders before and after reinforcement were calculated according to the current railway code. T he effect of reinforcement was verified though the static load tests. T he results indicated that the prestressed carbon fiber plate used for reinforce concrete slab girders can significantly improve the stress performance of girder,and satisfy the operational requirements under the 1. 2 times ZH load. T his technology was suggested to apply in the reinforcement of reinforced concrete slab girders used in heavy haul railway.
