Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Post-tensioned unbonded co-tensioned prefabricated prestressed concrete perforated beam frame structure connected by UHPC (Ultra High Performance Concrete) and design and construction method of post-tensioned unbonded co-tensioned prefabricated prestressed concrete perforated beam frame structure
The invention discloses a post-tensioned unbonded co-tensioned prefabricated prestressed concrete perforated beam frame structure connected by UHPC (Ultra High Performance Concrete). The post-tensioned unbonded co-tensioned prefabricated prestressed concrete perforated beam frame structure comprises a prefabricated concrete upper column, a prefabricated concrete lower column, a post-tensioned unbonded co-tensioned prefabricated prestressed concrete perforated superposed beam, a UHPC node core area and a superposed plate. The upper longitudinal main reinforcements extend out of the bottom surface of the prefabricated upper column and are directly anchored in the UHPC node core area, the lower longitudinal main reinforcements extend out of the top surface of the prefabricated lower column and are directly anchored in the UHPC node core area, and the common reinforcements and the pre-tensioned prestressed reinforcements extend out of the end surface of the prefabricated pre-tensioned prestressed concrete perforated beam and are directly anchored or anchored in the UHPC node core area in a bending manner; post-tensioned unbonded prestressed tendons are pre-buried in the prefabricated pre-tensioned prestressed concrete perforated beam components and penetrate through the UHPC joint core area, the two ends of each post-tensioned unbonded prestressed tendon extend out of the UHPC joint core area, a clamp and an anchorage device are fixedly arranged at the two ends of each post-tensioned unbonded prestressed tendon respectively, one end of each post-tensioned unbonded prestressed tendon is arranged on the outer side of a column, and the other end of each post-tensioned unbonded prestressed tendon is arranged in a beam laminated layer. The structural system is convenient and rapid in site construction, improves the component installation efficiency, can greatly reduce the anchoring length of the steel bars, greatly reduce the use amount of stirrups in a joint core area, avoid crowding of the steel bars in the joint core area, reduce the section height of the components, reduce the self weight, and improve the anti-cracking performance and the self-recovery performance of the components; therefore, the anti-seismic performance of the whole frame structure is improved. The pre-tensioned prestressed tendons enable the precast beams to be less or free of support during construction, the construction cost is reduced, the post-tensioned unbonded structure can enhance the integrity of the frame, so that the structure has certain self-resetting capability and structural toughness in an earthquake, and the post-earthquake repair cost is reduced.
本发明公开了一种UHPC连接的后张无粘结共张预制预应力混凝土开孔梁框架结构，包括预制混凝土上柱、预制混凝土下柱、后张无粘结的共张预制预应力混凝土开孔叠合梁、UHPC节点核心区和叠合板。所述上纵向主筋伸出预制上柱底面并直接锚固在UHPC节点核心区内，下纵向主筋伸出预制下柱顶面并直接锚固在UHPC节点核心区内，普通钢筋和先张预应力筋伸出预制先张预应力混凝土开孔梁端面并直接锚固或弯折锚固在UHPC节点核心区内，后张无粘结的预应力筋预埋在所述预制先张预应力混凝土开孔梁构件中，并穿过UHPC节点核心区且两端伸出所述UHPC节点核心区之外，其两端分别固定设置有夹具和锚具，一端设置在柱外侧，一端设置在梁叠合层内。该结构体系不仅现场施工方便快速、提高构件安装效率，而且既能大幅度减少钢筋锚固长度，大幅减少节点核心区箍筋用量，避免节点核心区钢筋拥挤，又能减小构件截面高度，减轻自重、提高构件抗裂性能和自恢复性能，从而改善整体框架结构的抗震性能。先张预应力筋使得预制梁在施工时可少支撑或免支撑，降低施工成本，后张无粘结可增强框架整体性，使得结构在地震中具备一定自复位能力和结构韧性，减少震后修复成本。
Post-tensioned unbonded co-tensioned prefabricated prestressed concrete perforated beam frame structure connected by UHPC (Ultra High Performance Concrete) and design and construction method of post-tensioned unbonded co-tensioned prefabricated prestressed concrete perforated beam frame structure
The invention discloses a post-tensioned unbonded co-tensioned prefabricated prestressed concrete perforated beam frame structure connected by UHPC (Ultra High Performance Concrete). The post-tensioned unbonded co-tensioned prefabricated prestressed concrete perforated beam frame structure comprises a prefabricated concrete upper column, a prefabricated concrete lower column, a post-tensioned unbonded co-tensioned prefabricated prestressed concrete perforated superposed beam, a UHPC node core area and a superposed plate. The upper longitudinal main reinforcements extend out of the bottom surface of the prefabricated upper column and are directly anchored in the UHPC node core area, the lower longitudinal main reinforcements extend out of the top surface of the prefabricated lower column and are directly anchored in the UHPC node core area, and the common reinforcements and the pre-tensioned prestressed reinforcements extend out of the end surface of the prefabricated pre-tensioned prestressed concrete perforated beam and are directly anchored or anchored in the UHPC node core area in a bending manner; post-tensioned unbonded prestressed tendons are pre-buried in the prefabricated pre-tensioned prestressed concrete perforated beam components and penetrate through the UHPC joint core area, the two ends of each post-tensioned unbonded prestressed tendon extend out of the UHPC joint core area, a clamp and an anchorage device are fixedly arranged at the two ends of each post-tensioned unbonded prestressed tendon respectively, one end of each post-tensioned unbonded prestressed tendon is arranged on the outer side of a column, and the other end of each post-tensioned unbonded prestressed tendon is arranged in a beam laminated layer. The structural system is convenient and rapid in site construction, improves the component installation efficiency, can greatly reduce the anchoring length of the steel bars, greatly reduce the use amount of stirrups in a joint core area, avoid crowding of the steel bars in the joint core area, reduce the section height of the components, reduce the self weight, and improve the anti-cracking performance and the self-recovery performance of the components; therefore, the anti-seismic performance of the whole frame structure is improved. The pre-tensioned prestressed tendons enable the precast beams to be less or free of support during construction, the construction cost is reduced, the post-tensioned unbonded structure can enhance the integrity of the frame, so that the structure has certain self-resetting capability and structural toughness in an earthquake, and the post-earthquake repair cost is reduced.
本发明公开了一种UHPC连接的后张无粘结共张预制预应力混凝土开孔梁框架结构，包括预制混凝土上柱、预制混凝土下柱、后张无粘结的共张预制预应力混凝土开孔叠合梁、UHPC节点核心区和叠合板。所述上纵向主筋伸出预制上柱底面并直接锚固在UHPC节点核心区内，下纵向主筋伸出预制下柱顶面并直接锚固在UHPC节点核心区内，普通钢筋和先张预应力筋伸出预制先张预应力混凝土开孔梁端面并直接锚固或弯折锚固在UHPC节点核心区内，后张无粘结的预应力筋预埋在所述预制先张预应力混凝土开孔梁构件中，并穿过UHPC节点核心区且两端伸出所述UHPC节点核心区之外，其两端分别固定设置有夹具和锚具，一端设置在柱外侧，一端设置在梁叠合层内。该结构体系不仅现场施工方便快速、提高构件安装效率，而且既能大幅度减少钢筋锚固长度，大幅减少节点核心区箍筋用量，避免节点核心区钢筋拥挤，又能减小构件截面高度，减轻自重、提高构件抗裂性能和自恢复性能，从而改善整体框架结构的抗震性能。先张预应力筋使得预制梁在施工时可少支撑或免支撑，降低施工成本，后张无粘结可增强框架整体性，使得结构在地震中具备一定自复位能力和结构韧性，减少震后修复成本。
Post-tensioned unbonded co-tensioned prefabricated prestressed concrete perforated beam frame structure connected by UHPC (Ultra High Performance Concrete) and design and construction method of post-tensioned unbonded co-tensioned prefabricated prestressed concrete perforated beam frame structure
一种UHPC连接的后张无粘结共张预制预应力混凝土开孔梁框架结构及其设计、施工方法
XIONG XUEYU (Autor:in) / FENG CHUANSHAN (Autor:in) / XIONG BIN (Autor:in) / CHEN JINGBIN (Autor:in)
30.12.2022
Patent
Elektronische Ressource
Chinesisch
| Europäisches Patentamt | 2022
| Europäisches Patentamt | 2022
| Europäisches Patentamt | 2022
| Europäisches Patentamt | 2022