6、裂缝宽度曲线。数值模拟结果显示提升结构的预应力度和上混凝土板纵向受力钢筋配筋率均可提高结构的开裂荷载、缩短裂缝间距、减小裂缝宽度,从而达到控制负弯矩区裂缝产生和扩展的目的。分析结果判定所选工程实例设计满足强度、刚度和裂缝宽度要求,同时截面设计有待于进一步优化。本文研究成果可供预应力钢混凝土双面组合连续梁的裂缝宽度计算参考,为进一步探究组合梁裂缝计算理论提供借鉴。关键词:双面组合连续梁;预应力度;配筋率;开裂荷载;裂缝间距;裂缝宽度AbstractAbstractCompared with single steel
7、-concrete composite beam, continuous double steel-concrete composite beam has gotten greater stiffness and carrying capacity butthe tension cracks problemin top concrete slabis still inevitablein negative moment region. The appearance of cracks affects stiffnes
8、s and durability of the structure. This dissertationdoes the research on the influence of pre-stressed degree and longitudinalreinforcement ratio to upper concrete slab tens