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采用基于ANSYS平台开发的预应力混凝土箱梁精细化数值模拟系统,研究城市高架桥连续宽箱梁受力特性,采用与梁单元分析对比的方法,探讨了预应力、恒载、温度、位移、活载等作用下的箱梁空间效应。研究发现,纵横预应力对纵横向受力均有影响;按常规梁单元分析方法,边腹板较实际情况偏于危险;各种作用的空间效应各有特点。建议对空间效应明显的宽箱梁采用精细化数值模拟系统进行分析。
The numerical simulation system of prestressed concrete box girder based on ANSYS platform is used to study the mechanical behavior of continuous wide box girder of urban viaduct. The method of comparison with beam element is used to study the influence of prestress, dead load, temperature, displacement, live load, etc. The effect of box girder space effect. The results show that the longitudinal and transverse prestress have an impact on the longitudinal and transverse forces. According to the conventional beam element analysis, the edge webs are more dangerous than the actual situation. The spatial effects of various effects have their own characteristics. It is suggested to analyze the wide-box girder with obvious space effect using the numerical simulation system.