Study On The Seismic Collapse Pattern And The Ruin’s Structural Characteristics Of Typical Masonry Structures

In this paper, through the shaking table test about different floor forms of masonry structure and the finite element analysis about the model of the test, explored whether if that by enhancing the integrity of the precast slab can control the collapse of masonry structure failure mode. By the finite element simulation of typical forms of masonry ruins, I discussed the security and the survival space of its ruins structure, combined with the results of the test and simulate damage, I summarized the set policies of rescue channels and the safety assessment of ruins. It have certain guiding significance in the anti-collapse about the design of typical masonry structure and the site search and rescue in the ruins.The main work accomplished in this paper, points mentioned below:1. The prototype structure use the reduced-scale ratio of 1:6. It designed and produced the two masonry structure model which had the different forms of floor slab. By earthquake simulation shaking table test, I study comparatively the dynamic characteristics and seismic response of the two models with different forms of floor slab throughout the different trial process, and analyzes emphatically the different results of the two models’ failure process and collapse modes.2. Selecting test conditions of two smaller seismic input, by using explicit finite element dynamic analysis methods, according to earthquake simulation test conditions, the seismic response analysis of two models were completed. Considering the unit failure and contact problems in the collapse simulation of the masonry structure, the collapse simulation process was completed. By analyzing the numerical simulation and shaking table test results, the finite element analysis and experimental results were cross verified reasonable.3. Which had more detailed study in ruins structure features of the two models after the collapse earthquake simulation tests, combined the observation of the actual damage and the simulation results of the experiment model and the collapse of earthquake damaged model, discussed the rule about the living space of the typical masonry structure ruins that has the possible existence, summarized the rescue channel set policies and safety assessment principles for this kind of structure ruins’ emergency rescue in the earthquake.Results of shaking table test and the finite element analysis simulation show that different forms of floor have significant role in the yield mechanism of structure. In the anti-collapse design of masonry structure, it can change prefabricated floor into assembly monolithic floor to enhance the whole structure anti-collapse ability. Ruins of form typical masonry structures can be classified. We can select different rescue channel set policies based on different forms of the ruins, and assess the security of different types of ruins.