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作者应用华北主要断裂模型和唐山、海城、平陆、临沂等地震断裂模型,进行了激光全息光弹、普通光弹以及软材料模拟的实验研究。 实验确定了华北断块区现代构造应力场的主压应力是北东东向水平挤压力。另外,还伴有地壳下部上地幔上隆的垂直向上的附加作用力。由于本地区构造的复杂性,由西至东主压应力的方向有所差异。 实验表明,华北地区各种类型发震构造的断裂闭锁区是强震发生的主要地点。 通过实验和定量分析,推测了华北地区的主要强震危险区的分布。
Based on the main fault models in North China and the earthquake rupture models of Tangshan, Haicheng, Pinglu and Linyi, the authors used laser holographic photoelasticity, ordinary photoelastic and soft material simulation experiments. The main compressive stress of the modern tectonic stress field in the fault block area of North China is determined by the horizontal east-northerly crushing force. In addition, it is accompanied by the vertical upward additional force of the upper mantle uplift in the lower part of the crust. Due to the complexity of the structure in the area, the direction of compressive stress varies from west to east. Experiments show that the fault-locked areas of all types of earthquakes in North China are the main sites of strong earthquakes. Through experimental and quantitative analysis, the distribution of major earthquake risk areas in North China is inferred.