Zhu Bolong devoted himself to the study of cylindrical shells in 1950s, extended vlasov's theory to prestressed cylindrical shells and cylindrical shells with various boundaries, and compiled practical calculation charts. He also took the lead in the research of artificial transverse tensioning prestressed concrete, and built a 24-meter prestressed statically indeterminate frame with simple equipment in the late 1950s, which was in a leading position in the theory and practice of similar projects at that time. Zhu Bolong is characterized by the close combination of theory and practice and bold innovation. In the 1960s, on the one hand, he devoted himself to studying the overall and spatial work of the house, and then he built a building on a particularly soft garbage beach; On the other hand, he made a theoretical research on the platform of prestressed suspended theater and started the engineering design, and finally realized this unique idea in the project of Shanghai Zhongxing Theater.
1976 The Tangshan earthquake had a great impact on Zhu Bolong. From then on, he made up his mind to devote his main energy to the research work of engineering earthquake resistance. In the past ten years, he has not only made many important research achievements, but also brought out a team of earthquake-resistant researchers and led the construction of a modern earthquake-resistant laboratory.
As early as 1960s, he started with the causes of oblique cracks in T-shaped thin web beams and set foot in the field of nonlinear problems of reinforced concrete. In 1960s, the nonlinear analysis methods such as bending, compression bending and frame were studied experimentally and theoretically. After the Tangshan earthquake, he transferred these studies to the field of structural earthquake resistance, and he was one of the earliest experts who systematically studied the rebound characteristics of reinforced concrete in China. He also compiled a program for nonlinear analysis of reinforced concrete by computer technology, developed an elective course in this field for graduate students, and published a monograph of the same name in 1985, becoming one of the well-known academic leaders in nonlinear analysis of reinforced concrete in China.
198 1 and 1982, respectively, published the theory of "crack surface effect" of low-cycle fatigue of reinforced concrete at the Sino-American seminar on earthquake resistance and the 6th World Earthquake Engineering Conference, which was well received by internationally renowned experts such as Bresler and Tassios. This achievement has been compiled into the relevant documents of CEB, and his research on nonlinear problems of reinforced concrete also involves dynamics, creep, prestress and other aspects, and has made great achievements.
As one of the academic leaders in the seismic research of engineering structures in Tongji University, he organized and carried out the research on the basic seismic performance of masonry and reinforced concrete, and did a lot of organization and guidance work on the seismic response and structural dynamic performance of single-family workshops, high-rise buildings, masonry houses, offshore platforms and transmission equipment. Especially in masonry and masonry structures, a series of tests and analysis have been carried out. This kind of structure has been neglected in theoretical research, but it is precisely the most extensive structural type that harms people's lives and property in China. Zhu Bolong's work in this field has been valued and praised at home and abroad.
Starting from 1978, Zhu Bolong led the engineering structure research room and laboratory of Tongji University, and paid a lot of labor for building a modern seismic research and test base. At the end of 1983, the first 4x4m simulated earthquake shaking table in China was built in Tongji University, imported from MTS in the United States, and the data was collected and analyzed by computer control. Immediately put into a lot of research work. Zhu Bolong and his graduate students have made a lot of research achievements by using this advanced equipment, especially in the identification of linear and nonlinear systems, which is at the forefront of domestic research work and has attracted the attention of international engineering seismic academic circles.