弹性支承钢筋混凝土深梁试验及全量理论分析

Research of Experiment and Full Theory Analysis for Three- Span R/C Continuous Deep Beams on Elastic Supports

对钢筋混凝土连续深梁进行试验研究及有限元分析。作了八根弹性支承上三跨 连续深梁试验；为保证深梁与支承的良好接触还自行设计了支承调节装置；用试验结 果对三跨连续深梁的受力特性进行了分析；对连续梁的配筋提出新的建议；在试验的 基础上，编制了全量理论分析连续深梁受力全过程的计算程序，用试验结果验证程序 的可靠性，并对全量理论的迭代方法进行改进；用该程序对集中荷载作用下三跨连续 深梁的受力特性进行分析；给出深梁开裂时剩余刚度范围，以便在试验和实际工程中 估计开裂的发生。

R/C continuous deep beams are tested and analyzed by finite element method in this paper. 8 three-span continuous deep beams on elastic supports have been tested by the authors. In order to make out a good contact with the supports, the authors have designed support equipment. New suggestions about the reinforcement on continuous deep beams are put forward. Based on the experiment, a full theory analysis program for deep beams has been compiled. The reliability of this program has been proved by the test result and the analytical solution. The authors have also improved the ordinary method to solve the simultaneous equation of full theory repeatedly. The mechanical properties of three-span R/C deep beams under concentrated load have been analyzed by this program. Through a large number of computa- tion, the range in cracking residual rigidity of deep beams are given for conve- nience to estimate the cracking in experiment and engineering practice.