浅谈预应力次梁结构的边主梁扭转效应  

Discussion of Edge Main Beam Torsional Effect of Prestressed Secondary Beam Structure

作　　者：何贤亭 He Xian-ting(Anhui Poly Real Estate Development Co.,Ltd.,Hefei 230000,Anhui Province,China)

机构地区：[1]安徽保利房地产开发有限公司,安徽合肥230000

出　　处：《建筑与装饰》2023年第12期115-117,共3页Construction & Decoration

摘　　要：本文首先介绍常规混凝土主次梁结构中次梁产生的剪力与弯矩作用于主梁,导致主梁产生扭转效应的不利影响。着重讨论采用预应力次梁结构降低大跨边主梁扭转效应,减少主梁开裂,并给出预应力次梁减少边主梁扭转的理论模型,分析预应力对于混凝土构件层面和结构层面带来的有利影响,为后续大跨度混凝土边主次梁的设计提供参考。This paper first introduces the adverse effects of the shear force and bending moment generated by the secondary beam in the conventional concrete main and secondary beam structure acting on the main beam,resulting in the torsional effect of the main beam.This paper discusses the use of prestressed secondary beam structure to reduce the torsion effect of the main beam of the long-spanedge and reduce the cracking of the main beam,and gives a theoretical model for reducing the torsion of the edge main beam of the prestressed secondary beam,and analyzes the favorable effects of prestress on the level of concrete components and structures,so as to provide a reference for the design of subsequent edge main and secondary beams of the long-span concrete.

关 键 词：扭矩折减系数 预应力次梁 边主梁 大跨 

分 类 号：U44[建筑科学—桥梁与隧道工程]