地震模拟振动台子结构混合试验边界条件的模拟方法研究防灾减灾工程及防护工程专业论文.docxVIP

哈尔滨工业大学工学硕士学位论文 哈尔滨工业大学工学硕士学位论文 - - II - Abstract Quasi-static testing in conventional seismic test method acquires only restoring forces properties of structures or elements; due to constraints of table scale and strength, only small-scaled model test can be carried out on shaking table; to velocity-dependent structures, we cannot use pseudo- dynamic test method. Thus, we have to develop new seismic test method. Substructure hybrid testing for shaking table was put forward by combining substructure pseudo-dynamic testing and shaking table testing. The structure to be tested is divided into one or more experimental and numerical substructures. Substructures with complex mechanics properties that are tested on shaking table are termed as experimental substructures; substructures with known mechanics properties that are simulated on computers are termed as numerical substructures. The earthquake ground motion is applied to the experimental substructures by shaking tables. Problems with loading, restoring forces, boundary condition simulation are implemented by actuators. Compared with conventional shaking table testing or substructure pseudo-dynamic testing, this method can carry out testing for large-scale model or even testing for full-scale structures. Boundary condition simulation is a major factor to affect the precision of the testing. The main research works were outlined as following: Firstly, the status of the art in substructure hybrid testing for shaking table at home and abroad was summarized. Secondly, the reconfigurable reaction wall in NEES, USA was summarized. The reconfigurable reaction wall was studied, and the reconfigurable reaction wall for substructure hybrid testing for shaking table was designed. Thirdly, simulation method on boundary conditions of experimental substructure was studied. Several simulation methods were put forward to simulate vertical load, shear force and moment. Simulation method for shear force was studied using a cantilever