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通过对比《公路钢结构桥梁设计规范JTGD64-2015》(以下简称:新版规范)和《公路桥涵钢结构及木结构设计规范JTJ025-86》(以下简称:旧版规范)的主要条款,了解并掌握新版规范在设计方法、设计指标、主要计算公式方面的改进,并通过一个简单的算例展示了新、旧规范的在强度、刚度及稳定性验算的主要区别。最后得出以下结论:新版规范采用极限状态设计法,引入了作用效应分项系数和材料抗力分项系数,提高了结构和构件的安全性,并且确保在不同作用组合下结构和构件可保持一致的安全度;在主要的计算内容上,通过引入有效截面和结构重要性系数,设立科学、实用的限值,采用更完善的计算模型等措施,提高了结构和构件的安全性,适用性,实用性。
By comparing the main provisions of “Highway Steel Structure Bridge Design Code JTGD64-2015” (hereinafter referred to as: the new version of the norms) and “highway bridge culvert steel structure and wood structure design specifications JTJ025-86” (hereinafter referred to as the old version of the norms) to understand and master the new version Standardize the improvement in the design method, design index and main calculation formula, and show the main difference between the new and old norms in strength, stiffness and stability checking through a simple example. Finally, the following conclusions are drawn: the new version adopts the method of limit state design, introduces the effect effect sub-item coefficient and the material resistance sub-item coefficient, improves the safety of the structure and the components, and ensures that the structures and the components can be consistent under different action combinations The main content of the calculation is to improve the safety and applicability of the structure and its components by introducing effective cross-section and structural importance coefficient, establishing scientific and practical limits, adopting more perfect calculation models and other measures, Practicality.