中文摘要：

老城中心区通常经过了长期的空间发展和文化沉淀，其更新演替过程存在着错综复杂的内外影响因素。研究老城中心区的发展演替历程，可以深入分析其空间格局的历史根基及空间演替的推动力。采用历史文脉发展的建构、解构及重构的方式对老城中心区发展演替历程进行研究，并以上海市中心人民广场地区为例，分析其空间结构的百年变迁，提出它的演替经历了单核顺延发展、圈核分区发展及多核连绵发展三个阶段，并详细分析了在空间演替中的各种驱动力。

英文摘要：

The evolvement of old city center often takes place over a long period of time and it bears strong local cultural inprints. This process is conditioned by complex internal and external factors. The study of old city center can help dis- cover local historical roots and patterns of spatial changes. This paper uses con- struction, deconstruction and reconstruction method to study the old city center of Shanghai and analyzes its spatial structure over a hundred years＇ of transition. The research finds that People＇s Square central area in Shanghai had experienced three stages of development, namely, single-core development, circle-core develop- ment and multiple-core development. The paper also provides a detailed analysis of various driving forces in its spatial transition.