CAJ | 학술논문

对新型结构波形钢腹板预弯工形梁的制作工艺和承载性能开展了探索性研究．通过制作缩尺试验梁，着重分析了波形钢腹板钢梁在预弯力作用下的挠度和反弹后一期混凝土的压应力，并采用静载试验测试了对称集中荷载作用下的梁体变形、开裂弯矩、破坏形态和极限承载力等．试验结果表明，在预弯力作用下波形钢腹板具有良好的稳定性．释放预弯力后波形钢腹板钢梁能够有效地将预应力施加在一期混凝土上，跨中下缘混凝土的压应力为12．9 MPa．试验梁具有良好的抗弯刚度、延性和抗裂性能，其开裂荷载约为极限承载力的47％．理论与实测结果表明，波形钢腹板预弯工形梁的竖向剪切挠度占总挠度的22．4％，在计算挠度时需考虑剪切变形的影响．
대신형결구파형강복판예만공형량적제작공예화승재성능개전료탐색성연구．통과제작축척시험량，착중분석료파형강복판강량재예만력작용하적뇨도화반탄후일기혼응토적압응력，병채용정재시험측시료대칭집중하재작용하적량체변형、개렬만구、파배형태화겁한승재력등．시험결과표명，재예만력작용하파형강복판구유량호적은정성．석방예만력후파형강복판강량능구유효지장예응력시가재일기혼응토상，과중하연혼응토적압응력위12．9 MPa．시험량구유량호적항만강도、연성화항렬성능，기개렬하재약위겁한승재력적47％．이론여실측결과표명，파형강복판예만공형량적수향전절뇨도점총뇨도적22．4％，재계산뇨도시수고필전절변형적영향．
A scaled model beam was fabricated to explore the construction technology and load-car-rying capacity of a new structure, preflex I-beam with corrugated steel web.The deformation of the preflex steel beam under preflex loads and the stress of the first-stage concrete after rebounding were emphatically analyzed.The structural deformation, cracking moment, damaged shape and ultimate bearing capacity of the model beam under symmetrically concentrated forces were tested.The experi-mental results show that the corrugated steel web is steady under preflex loads.The prestress can ef-fectively be applied to the first-stage concrete by preflex steel beam after rebounding, and the com-pressive stress of concrete at the lower edge of the beam is 12 .9 MPa.The test beam possesses good ductility, flexural stiffness and crack resistance.The cracking load of the test beam is about 47%of its ultimate load capacity.Analytical and experimental results indicate that the shearing deflection of the preflex I-beam with corrugated steel web in mid-span is 22 .4% against the total deflection, which needs to be considered in calculation.