CAJ | 학술논문

采用预应力技术改善大跨度型钢混凝土梁正常使用性能，从而形成新型的预应力型钢混凝土梁（ PSRCB）组合结构。文章基于大跨度框架梁结构设计，对型钢混凝土梁与预应力型钢混凝土梁结构方案进行了对比研究，采用非线性有限元分析考察了预应力型钢混凝土梁的受力机理和结构设计的可靠性。结果表明：大跨度型钢混凝土梁的配筋由正常使用性能（如最大裂缝宽度）控制，采用预应力型钢混凝土梁更加经济合理；预应力型钢混凝土框架梁内置型钢减小了开裂后刚度的变化量，材料强度得到充分发挥；适度增加型钢混凝土梁预应力度可以减小的梁跨中挠度，降低钢筋及型钢受拉应力，改善其正常使用性能。
채용예응력기술개선대과도형강혼응토량정상사용성능，종이형성신형적예응력형강혼응토량（ PSRCB）조합결구。문장기우대과도광가량결구설계，대형강혼응토량여예응력형강혼응토량결구방안진행료대비연구，채용비선성유한원분석고찰료예응력형강혼응토량적수력궤리화결구설계적가고성。결과표명：대과도형강혼응토량적배근유정상사용성능（여최대렬봉관도）공제，채용예응력형강혼응토량경가경제합리；예응력형강혼응토광가량내치형강감소료개렬후강도적변화량，재료강도득도충분발휘；괄도증가형강혼응토량예응력도가이감소적량과중뇨도，강저강근급형강수랍응력，개선기정상사용성능。
Prestressed steel reinforced concrete( PSRC)beam is a new type prestressed composite beam which uses prestressing technology in SRC beam to improve its serviceable performance. The comparison between PSRC beam and SRC beam was conducted to point out the advantages and disadvantages of each structure scheme. The bearing mechanism and the reliability of structural design for PSRC beam we are analyzed by three-dimensional nonlinear finite element method. Research indicates that,the serviceable performance(such as maximum crack width)of large span SRC beam is difficult to control and the use of prestressing technology in SRC beam is economical and reasonable;the rigidity of PSRC beam decreases more slowly after crack due to the H-tape steel;the strength of material is fully utilized;the deflection and stress of tensile rebar and H-tape steel are reduced by improving the prestressing degree of PSRC beam.