钢—压型钢板混凝土组合梁设计理论与方法研究

【作者】 邹友林；

【导师】 李子青；

【作者基本信息】 长安大学 ， 桥梁与隧道工程， 2005， 硕士

【摘要】 钢-压型钢板混凝土组合梁是以施工时先铺设在钢梁上的压型钢板作为工作平台和模板,并将混凝土和凹凸相间的压型钢板以及钢梁三者通过剪力连接件有意识地组合在一起,成为一个整体承重结构。该结构能大大加快施工进度,充分利用材料性能,综合经济效益显著。近年来,钢-压型钢板混凝土组合梁在我国发展很快,在结构工程中得到越来越广泛的应用。 随着钢-压型钢板混凝土组合梁的发展,对该结构受力性能的进行系统研究引起广泛关注。本文以国内外相关理论、试验研究及设计施工资料的收集为基础,探讨栓钉剪力连接件的破坏机理,受力特性和影响栓钉承载力主要因素,得到栓钉剪力连接件在钢-压型钢板混凝土组合梁中的设计理论和布置规律:分析钢-压型钢板混凝土组合梁在承受荷载过程中受力性能,破坏形态和截面应变分布规律,栓钉受力性能;参考已有钢-压型钢板混凝土组合梁抗弯承载力研究成果,分析、总结和完善弹性刚度、弹性抗弯承载力的修正折减刚度法,验证内插法计算组合梁极限抗弯承载力是实际可行的,建议放宽对剪力连接程度的范围和探讨修正栓钉抗弯承载力的计算公式;分析和讨论钢-压型钢板混凝土组合梁在承受荷载过程中截面应变发展规律、全截面弯矩在受力过程中的分配规律、提高栓钉剪力连接件承载力的措施、梁端产生负弯矩的原因以及在考虑组合作用时,压型钢板和栓钉布置方式对钢-压型钢板混凝土组合梁承载性能的影响;最后,介绍钢-压型钢板混凝连续组合梁在人行天桥建设中应用的基本情况和设计方法,并对该结构进行有限元模型模态分析,计算其振动模态。通过实例分析,表明钢-压型钢板混凝土组合梁具有很大的优越性,值得进一步推广和应用。更多还原

【Abstract】 The composite steel-concrete beams with profiled sheeting are the system to be united steel beams and concrete slabs with profiled steel sheeting by shear connectors welded to steel beams. The profiled steel sheeting can be employed as the permanent formwork.. It can thus been seen that the time involved in construction is considerably shortened, the appropriate proprerties of materials are effectively utilized, and the obvious economical benefit is got. Over the recent years, the composite steel-concrete beams with profiled sheeting have been developed very fast in China. They are more and more widely used in constructional engineering.With the development of composite steel-concrete beams with profiled sheeting, the systematic study on its behavior draws wide attention. This paper focuses on following items. Firstly, on the basis of analysis of the related theory researches, testing datas, design and construction datas, it has a sufficient analysis in the problems of failure mechanism of shear connectors, shear characeristics, the main factors that affect the shear resistance. Then, a design theory and arrangement method of shear connector in composite steel-concrete beams with profiled sheeting is formulated. Secondly, load-deflection performance, typical failure modes and strain distribution are proposed in this thesis. The modified reduced rigidity method is derived to calculate the deformation and elastic flexural capacity of composite beams with profiled sheeting. The interpolation with all range of degree of shear connection, and the previous limit that the degree of shear connection should be higher because of the factor proved to be over-conservative. Next, the development of strain, the moment contributions of the three components and the failure modes of studys are analsed. The measures are presented to strength the resistance capacity of shear capacity. Besides, the reason and the main factors affecting are verified about negative moment on the border of the beams. With the consideration of cooperation action of the system in the beams, the main factors that affect the flexural capacity of the beams are discussed. Last, there is a statement that composite steel-concrete beams with profiled sheeting are applied in the passenger footbridge. Practise proves that this kind of beams should have a widely application in constructional engineering because of the advantages.更多还原