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Steel-concrete composite structure continuous box girder and manufacturing method thereof
The invention discloses a steel-concrete composite structure continuous box girder and a manufacturing method thereof, and belongs to the technical field of bridge structures. The continuous box girder still adopts a flat steel web in a sagging moment area, but adopts a corrugated steel web to replace a conventional flat steel web in a middle fulcrum hogging moment area, adopts an embedded PBL shear connector to connect the corrugated steel web and a concrete top plate, and is filled with an elastic material between the outer sides of a wave crest section and a wave trough section of the corrugated steel web and a concrete contact surface to form a reserved deformation buffer area. Once prestress is applied to the hogging moment area, compressive deformation is prone to occurring under pressure due to the fact that the longitudinal rigidity of the corrugated steel web is small, and meanwhile, the elastic material allows the corrugated steel web to transversely expand and deform. By means of the combined action of the two factors, the pre-pressing stress can be effectively applied to the concrete top plate, and the prestress applying efficiency is effectively improved. The compositestructure effectively relieves the possibility of concrete cracking in the hogging moment area, and the safety and durability of the bridge are improved.
本发明公开了一种钢‑混凝土组合结构连续箱梁及其制作方法，属于桥梁结构技术领域。其正弯矩区依然采用平钢腹板，但是在中支点负弯矩区采用波形钢腹板替代常规平钢腹板，采用嵌入式PBL剪力连接件连接波形钢腹板与混凝土顶板，并且在波形钢腹板的波峰段和波谷段外侧与混凝土接触面之间填充弹性材料形成预留的形变缓冲区域。一旦在负弯矩区施加预应力，由于波形钢腹板的纵向刚度小，受压易产生压缩变形，同时弹性材料允许波形钢腹板横向产生膨胀变形。藉由上述两个因素的联合作用，预压应力能有效施加在混凝土顶板内，有效提高了预应力施加效率。该组合结构有效缓解负弯矩区混凝土开裂的可能性，提高桥梁安全性和耐久性。
Steel-concrete composite structure continuous box girder and manufacturing method thereof
The invention discloses a steel-concrete composite structure continuous box girder and a manufacturing method thereof, and belongs to the technical field of bridge structures. The continuous box girder still adopts a flat steel web in a sagging moment area, but adopts a corrugated steel web to replace a conventional flat steel web in a middle fulcrum hogging moment area, adopts an embedded PBL shear connector to connect the corrugated steel web and a concrete top plate, and is filled with an elastic material between the outer sides of a wave crest section and a wave trough section of the corrugated steel web and a concrete contact surface to form a reserved deformation buffer area. Once prestress is applied to the hogging moment area, compressive deformation is prone to occurring under pressure due to the fact that the longitudinal rigidity of the corrugated steel web is small, and meanwhile, the elastic material allows the corrugated steel web to transversely expand and deform. By means of the combined action of the two factors, the pre-pressing stress can be effectively applied to the concrete top plate, and the prestress applying efficiency is effectively improved. The compositestructure effectively relieves the possibility of concrete cracking in the hogging moment area, and the safety and durability of the bridge are improved.
本发明公开了一种钢‑混凝土组合结构连续箱梁及其制作方法，属于桥梁结构技术领域。其正弯矩区依然采用平钢腹板，但是在中支点负弯矩区采用波形钢腹板替代常规平钢腹板，采用嵌入式PBL剪力连接件连接波形钢腹板与混凝土顶板，并且在波形钢腹板的波峰段和波谷段外侧与混凝土接触面之间填充弹性材料形成预留的形变缓冲区域。一旦在负弯矩区施加预应力，由于波形钢腹板的纵向刚度小，受压易产生压缩变形，同时弹性材料允许波形钢腹板横向产生膨胀变形。藉由上述两个因素的联合作用，预压应力能有效施加在混凝土顶板内，有效提高了预应力施加效率。该组合结构有效缓解负弯矩区混凝土开裂的可能性，提高桥梁安全性和耐久性。
Steel-concrete composite structure continuous box girder and manufacturing method thereof
一种钢-混凝土组合结构连续箱梁及其制作方法
WU WENQING (author) / HE DONGCHEN (author) / ZHOU YISONG (author) / DAI JINXI (author) / SHI ZHONGQI (author) / WANG XINYA (author) / LIU HONGYI (author)
2020-04-17
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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