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对各国地震作用计算的结构影响系数的构成进行分析。结果表明,美国的结构影响系数中包括材料的超强系数、结构体系固有的超强系数以及延性系数,而欧洲的结构延性系数包含结构体系的超强系数和延性系数,日本和我国仅包含延性系数。由于日本采用允许应力设计,还有一个1.4的安全系数,因此比较起来,日本的地震作用效应最大。同时还对设防烈度地震下的侧移和设计地震作用下的侧移之间的关系进行讨论,对各国规范中的公式的合理性进行论述,指出欧洲EC 8中的设防烈度地震侧移计算公式与EC 8中的地震作用理论最为符合,但也存在不合理的地方。根据结构影响系数的理论分析结果,给出了各周期段的弹塑性位移和设防烈度地震弹性位移的关系式。
The composition of the structural influence coefficient of earthquakes in each country is analyzed. The results show that the structural influence coefficients of the United States include the super-strength coefficient of materials, the inherent super-strength coefficient and the ductility coefficient of the structural system, while the structural ductility coefficient of Europe includes the super-strength coefficient and ductility coefficient of the structural system, while Japan and China only include the ductility coefficient. Due to the allowable stress design in Japan and a safety factor of 1.4, Japan has the most seismic effect by comparison. At the same time, the relationship between lateral displacement under fortified earthquake and lateral displacement under design earthquake is also discussed. The rationality of formulas in different countries’ norms is discussed. The formula of fortification seismic lateral displacement in European EC 8 It is most consistent with the theory of seismic action in EC 8, but there are also unreasonable places. According to the theoretical analysis results of structure influence coefficient, the relationship between elastic-plastic displacement and fortified seismic elastic displacement in each period is given.