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通过对12根钢筋混凝土两跨连续开洞深受弯构件在集中荷载作用下的支座反力变化情况进行试验研究,并对试件进行有限元分析,对比了跨高比、剪跨比、有无开洞、洞口位置及大小等因素下的支座反力变化规律以及逐级加载直至破坏过程中边、中支座反力的重分布情况。通过线性回归分析,提出钢筋混凝土两跨连续深受弯构件在集中荷载作用下的支座反力计算公式及破坏阶段开洞深受弯构件剪力取值建议。
Through the experimental research on the dynamic responses of 12 deep reinforced concrete two-span continuous open deep flexural members subjected to concentrated load, the finite element analysis of the specimens is carried out. The span-to-height ratio, shear span ratio, With or without holes, location and size of the hole under the support of factors such as reaction force and step by step until the process of destruction of the side, in the reaction of the redistribution of the situation. Based on the linear regression analysis, the calculation formula of the bearing reaction force of reinforced concrete two-span continuous deep deep flexural members subjected to concentrated load and the shear strength value of deep flexural members in the failure stage are proposed.