Prefabricated bridge pier system has been widely used in non-strong earthquake areas at home and abroad due to its advantages of rapid construction and shorter construction period. At present, the research on seismic performance of precast pier system is not mature, which limits its engineering application in strong earthquake areas. The precast pier system is divided into equivalent cast-in-place connection, non-equivalent cast-in-place connection, UHPC connection and recoverable connection after earthquake. This paper introduces the basic structure, force transfer mechanism and seismic performance of different connection forms, and focuses on the relevant research of UHPC connection and post-earthquake recoverable connection. On this basis, the future research direction of precast pier connection technology is analyzed and prospected to promote the reasonable application of precast pier connection technology in domestic practical projects.

A series of analysis of a hybrid structure exhibition hall were conducted by FEM software MIDAS/Gen, including spectrum analysis, elastic time-history analysis and Pushover analysis.Comparing the results of elastic time-history analysis with those of spectrum analysis, the weaker stiffness parts of the structure were found, which provided a reference for the aseismic design of a complex structure.Based on capacity spectrum method through MIDAS/Gen, the requirement spectrum, capacity spectrum and performance point of the structure were obtained while elastic-plastic responses of the structure under severe earthquake were also analyzed.The research findings indicated that the structural vibration was dominated by translation motion, meanwhile, the phenomenon that the plastic hinge appeared at the beam end firstly before the top of the structure reached the target displacement complied with the beam plastic-hinge failure mechanism.

In this paper,it was carried out nonlinear numerical simulation of six axial specimens and nine eccentric compression specimens of steel reinforced recycled aggregate concrete columns using open-source earthquake engineering simulation system OpenSees.It was also analysed the effects of the recycled aggregate replacement rate,slenderness ratio and concrete strength on the bearing capacity of the exially loaded specimens,and also analyzed the effects of the recycled aggregate replacing rate,relative eccentricity and concrete strength on the bearing capacity of the eccentrically loaded specimens.In the analyzing process,the column section was fine-divided and different fibers were defined to simulate the appropriate material properties.And then,a model of SRRAC column was established based on the nonlinear beam-column element.The comparative analysis of the simulation results and the experimental results indicates that OpenSees Program can be used in simulating the loading process of steel reinforced recycled aggregate concrete columns effectively.

The large spatial reticulated structures belong to vibration and defects sensitive structures when vibrations will be easily produced under dynamic loading actions, and dynamic failure accidents will be caused. The application of the piezoelectric smart material in structural vibration control was researched with the shaking table test of active seismic control simulation of the spatial reticulated shell model structure.The results show that the piezoelectric actuators optimally arranged can effectively decrease earthquake responses of the structure, so it is a good active seismic control method.