摘要
为了研究HRB500钢筋超高性能混凝土连续梁的弯矩调幅性能,依据非线性理论分析了超高性能混凝土连续梁弯矩调幅系数的计算方法,并编制了相应的程序,通过与已有试验结果的对比验证了程序的准确性。通过对22根HRB500钢筋超高性能混凝土连续梁的模拟分析,计算了22根模拟梁在正常使用极限状态及承载能力极限状态下的弯矩调幅系数;根据模拟结果,提出以中支座截面相对受压区高度ξ为自变量的弯矩调幅系数β的计算公式为β=-3.541ξ+0.867;最后以正常使用极限状态下裂缝宽度不大于0.2 mm为控制条件,建议ξ≤0.13时β取0.4,ξ≥0.21时β取0.1,0.13<ξ<0.21时,β值采用直线内插求得。
This research analyzes the calculation method of the moment redistribution coefficients of the ultra-high performance concrete （ UHPC） continuous beams based on nonlinear theory to study the moment redistribution performance of the HRB500-reinforced UHPC continuous beams. A calculation program is also compiled. The program accuracy is verified by comparing the results derived herein with the existing test results. The moment redistribution coefficients of 22 simulated HRB500-reinforced UHPC continuous beams are obtained through a numerical analysis under normal service and ultimate load limit states. The simulation results show the formula for the moment redistribution coefficients as β= -3.541ξ＋0.867, where the independent variable ξ is equal to the relative height of the compressive region of the intermediate support section. Considering the limit of the maximum crack width to be less than 0.2 mm in the serviceability limit states,βis suggested to be equal to 0.4 whenξis less than or equal to 0.13.β is equal to 0. 1 when ξ is greater than or equal to 0. 21. Moreover, β is calculated using a linear interpolation method when ξ is greater than 0.13 and less than 0.21.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2016年第11期1520-1525,共6页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(51378032)
河南省高等学校重点科研项目(16A560021)
