Bridge construction is undergoing the developmental stage from simple form and short span to complex structures and large span structures , with the development of civilization science and economy , the new technology , new material and new craft are applying , and the research of the load bearing on the bridge is going deeply , which urge us speeding up the research of bridge mechanics question and promote the development of bridge mechanics 随着文化、科学和经济的不断发展，桥梁建设经历了从小跨度、形式简单到大跨度、结构复杂的发展阶段。随着新技术、新材料、新工艺的不断应用，以及桥梁上作用荷载研究的不断深入，也促使人们加紧了桥梁力学问题的研究，推动了桥梁力学的发展：反过来，桥梁力学的研究成果也使桥梁的设计、施工及管理水平得到了进一步的提高。
