No abstract

This study investigated and classified typical structures in rural village and analyzed the vulnerability. Based on the statistics of earthquake damages with magnitudes above 5 from 1996 to 2013 in China, the damage matrixes of types of structures in rural village are obtained. The vulnerability index and equation of structure are crucial to assess the earthquake losses of typical structures under different magnitudes earthquakes. According to the seismic loss of different types of structures under different earthquake magnitudes, there are possible to improve the seismic resilience of the buildings in rural village. Moreover, the regional vulnerability is analyzed by β probability distribution function. The comprehensive seismic vulnerability index of different types of structures in rural villages is obtained. The main research is to predict the loss of different types of structures under different earthquake magnitudes in the future, and to provide technical support for types of buildings in rural village reinforcement.

Based on investigation of rural buildings in china, there are more than 20% of the masonry structures constructed in 1970s. Thus, the old blue bricks (OBB) and old red bricks (ORB), which demolished from the typical brick masonry structures was built in 1970s, was chosen in the test. During demolishing the OBB and ORB, the original mortar was destroyed. Thus, the 1:7.8 cement mortar was chosen instead of original mortars and the 1:5 cement mortar was chosen as the reinforcement mortar. In order to know the performant of the reinforcement methods, there are three-level test plan was put forward in the study. Firstly, the mechanical properties of OBB and ORB and mortars was tested; Secondly, the experiment tested the shear strength of the reinforced and unreinforced masonry specimens along mortar joints; Thirdly, there are four walls (OBB reinforced wall and unreinforced wall, ORB reinforced wall and unreinforced wall) have been made for the pseudo-static tests. This research conducted physical performance tests on masonry bricks, masonry components, and masonry walls of typical masonry structures. Through experiments, the shear capacity of the masonry structure reinforced by high-strength mortar and steel bars can be obtained.

Urban emergency shelters are very important public safety facilities. This paper analyses the spatial accessibility of emergency shelters in urban Tianjin by simulating the evacuation process. This process is divided into stages by using GIS spatial analysis techniques based on shelter data and house data. A big difference or ascendancy is that this method can find out the discrimination in the service supply and service demand. The difference can reveal the competition among them. The experience results show that, except for Hebei District, which needs to increase the construction of evacuation sites, the spatial distribution of emergency evacuation sites in other districts and counties in Tianjin is reasonable, but there is a need to improve the utility rate of large and medium-sized evacuation sites in terms of planning, construction and management.

No abstract