桥梁建设
橋樑建設
교량건설
BRIDGE CONSTRUCTION
2015年
1期
85-90
,共6页
斜拉桥%混合梁%PBL剪力键%活性粉末混凝土%插入试验%承载力%试验研究
斜拉橋%混閤樑%PBL剪力鍵%活性粉末混凝土%插入試驗%承載力%試驗研究
사랍교%혼합량%PBL전력건%활성분말혼응토%삽입시험%승재력%시험연구
cable-stayed bridge%hybrid girder%PBL shear connector%reactive pow der con-crete%plug-in test%bearing capacity%test study
为研究灌注材料与钢板的粘结作用力、孔内榫作用力、贯穿钢筋作用力对PBL剪力键承载力的影响，以某混合梁斜拉桥的钢－混结合段剪力键实际结构为依托，分别以C55混凝土和活性粉末混凝土为灌注材料，设计制作了16个PBL剪力键试件进行单板插入式加载试验，分析了试件的荷载～相对位移曲线、破坏形态及各组成部分占总承载力的比重。结果表明：各试验试件均为传剪构件剪断破坏，在承载力及延性方面，采用RPC作为灌注材料的试件均优于采用C55混凝土作为灌注材料的试件；设置贯穿钢筋后，PBL剪力键的承载力及延性性能均有明显的提高；灌注材料与钢板的粘结作用力、孔内榫作用力、贯穿钢筋作用力分别约占 PBL 剪力键总承载力的20％、40％、40％。
為研究灌註材料與鋼闆的粘結作用力、孔內榫作用力、貫穿鋼觔作用力對PBL剪力鍵承載力的影響，以某混閤樑斜拉橋的鋼－混結閤段剪力鍵實際結構為依託，分彆以C55混凝土和活性粉末混凝土為灌註材料，設計製作瞭16箇PBL剪力鍵試件進行單闆插入式加載試驗，分析瞭試件的荷載～相對位移麯線、破壞形態及各組成部分佔總承載力的比重。結果錶明：各試驗試件均為傳剪構件剪斷破壞，在承載力及延性方麵，採用RPC作為灌註材料的試件均優于採用C55混凝土作為灌註材料的試件；設置貫穿鋼觔後，PBL剪力鍵的承載力及延性性能均有明顯的提高；灌註材料與鋼闆的粘結作用力、孔內榫作用力、貫穿鋼觔作用力分彆約佔 PBL 剪力鍵總承載力的20％、40％、40％。
위연구관주재료여강판적점결작용력、공내순작용력、관천강근작용력대PBL전력건승재력적영향，이모혼합량사랍교적강－혼결합단전력건실제결구위의탁，분별이C55혼응토화활성분말혼응토위관주재료，설계제작료16개PBL전력건시건진행단판삽입식가재시험，분석료시건적하재～상대위이곡선、파배형태급각조성부분점총승재력적비중。결과표명：각시험시건균위전전구건전단파배，재승재력급연성방면，채용RPC작위관주재료적시건균우우채용C55혼응토작위관주재료적시건；설치관천강근후，PBL전력건적승재력급연성성능균유명현적제고；관주재료여강판적점결작용력、공내순작용력、관천강근작용력분별약점 PBL 전력건총승재력적20％、40％、40％。
To study the influences of the bond acting forces between the casting materials and steel plate ,the tenon acting forces in the shear pockets and through reinforcement acting forces on the bearing capacity of the PBL shear connectors ,the actual structures of the shear connectors used for the steel and concrete joint section of a hybrid girder cable‐stayed bridge were taken as a case study .The C55 concrete and the reactive powder concrete (RPC) were respectively used as the casting materials ,16 PBL shear connector specimens were designed and fabricated ,the plug‐in load tests of the single plate were made and the load~ relative slip displacement curves ,the failure modes of the specimens and the proportions of the various acting forces accounting for the total bearing capacity of the shear connectors were analyzed .The results of the analysis show that the specimens are all the shear transfer components that fail in shear .As regards the bearing capacity and ductility ,the specimens using the RPC as the casting material are superior to those using the C55 concrete .After the through reinforcement are arranged ,the bearing capacity and ductility of the shear connectors have been significantly increased and the bond acting forces ,ten‐on acting forces and through reinforcement acting forces respectively account for about 20% , 40% and 40% of the total bearing capacity of the shear connectors .
