整体现浇组合过梁配筋形式与力学性能研究

研究了非抗震作用下整体现浇组合过梁的配筋形式,通过本文建立的模型进行了整体现浇组合过梁配筋量的计算,利用试验验证了上述配筋形式的可行性,得到如下结论：1）过梁部分受拉区钢筋锚入连梁或框梁的锚固长度36 d（非抗震设计）满足要求,过梁部分受拉区配筋形式理论上可行;2）按照连梁或框梁部分与过梁部分分别计算的配筋量,当达到正常使用极限状态时,连梁或框梁部分受压区钢筋与过梁部分受拉区钢筋能够达到甚至超过屈服强度,而连梁或框梁部分受拉区钢筋则未达到屈服强度,将连梁部分受拉区钢筋面积减少20％左右时才能达到屈服强度;3）过梁部分受拉区钢筋面积需要增加40％左右才能保证设计的安全可靠度.

Research of the form of reinforcing bar and mechanical properties about integral cast-in-situ composite lintel

The form of reinforcing bar of integral cast-in-situ composite lintel under non seismic action was studied and the area of reinforcing bar in integral cast-in-situ composite lintel was calculated according to the model established in this paper. The feasibility of the form of reinforcing bar was verificated by the experiment and the conclusion was get that： 1 ） The anchorage length （ 36 d） that reinforcing bar of tensile zone in lintel anchored in frame beams or coupling beams met the requirements and the form of reinforcing bar in lintel was feasible in theory. 2） When reaching to serviceability limit state, the reinforcing bar of compression zone in frame beams or coupling beams and the reinforcing bar of tensile zone in lintel can reach to the yield strength and the reinforcing bar of tensile zone in frame beams or coupling beams can not reach to the yield strength. When the area of reinforcing bar in tensile zone of frame beams or coupling beams was reduced of about 20%, the reinforcing bar can reach to the yield strength. 3 ） In order to ensure the reliability of safety,the area of reinforcing bar in tensile zone of lintel should be increased by about 40%.