Applied Mechanics and Materials Vols. 204-208

Abstract: In this paper, the subway station structure seismic response of large-scale three-dimensional shaking table model test is analysis, the model system acceleration response time, the stress response of the model structure of the schedule and structure of the surface of the earth pressure time is obtained, which has been the subway underground structure seismic response of the general law, the conclusion can provide a reliable basis and guidance for the seismic design of the MTR underground structures in the general venue.

Abstract: In order to study the behavior of piled wharf system under seismic excitation, numerical analyses are conducted by employing the Newmark’s time-integration algorithm. In the computational model, both nonlinearity of subsoil and the contact behavior between pile-soil interfaces are considered. The numerical results show that the horizontal displacement extremum of all piles in time history increase with the pile height under horizontal seismic excitation. Especially, the side pile of wharf system in the bank slope appears larger horizontal displacement compared with the other piles. Furthermore, the extremum variation of horizontal acceleration and bending moment of the side pile displays a non-monotonic characteristic. Based on computational results and theoretical analyses, several conclusion remarks are drawn, which can provide valuable and referable experience to some extent for related engineering practice and design.

Abstract: For further study on effective seismic design requirements of masonry structure, two masonry buildings were designed and constructed according to common structure style in towns and villages. Two full-scale buidings were subjected to earthquake using pseudo-dynamic test and quasi-static test. This paper presents crack propagation of masonry structure, hysteretic behavior, deformation and stiffness degradation under horizontal seismic action. In this experiment, deformability and ultimate bearing capacity of confined masonry (CM) with tie-column and ring-beam is higher than common brick structure (BM). Confined masonry (CM) wall maintain integrity due to constraint of tie-column and ring-beam. These tests verify that tie-column and ring-beam system is an effective seismic requirement to enhance seismic performance of masonry structure.

Abstract: Vertical storage tank is widely used as a liquid storage container in the oil deposit, petrochemical industry and related enterprise. It always stores inflammable, explosive medium. The consequences are very serious, when the earthquake disaster occurs. In this paper, we build models of model tank and 30,000 m3 tanks with the finite element method, and analyze their vibration characteristics and seismic response. We wish that the research can provide fundamental data for the similar studies.

Abstract: The purpose of this study is to use binary regression to construct the forecast model about the damage of the buildings in the earthquake disaster, and differentiate the relationship between the breakage and the collapse of the building and the character of the building by coefficients of the model. The Urban Planning Region of Chung-Hsing New Village is 7.0 magnitude earthquake area and the researched subject of this study. The reasons of the building collapses in the earthquake disaster can be induced by relative bibliographies and investigation data of collapses of the buildings in fields in reference units at 921 earthquake time. The model variables are chosen by considering the feasibility of the data which are obtained and investigated in fields. A forecast model about the damage of the middle and lower floor buildings in earthquake disaster is established by logistic regression of binary regression method. The model is through the coefficient test, the expected sign, the test of significance and the precise rate of the model, to understand the significance of the model coefficient and the application to the strategy.

Abstract: This is the first introduction of multimode system theory for risk assessment of earthquake-induced landslide. The paper defines the small watershed as multimode system which included triggering system and environmental system, through studying the relationship between multimode system and risk assessment of earthquake-induced landslide. Then the paper evaluates the risk of earthquake-induced landslide in 138 small watersheds with the multimode system, and verifies the result with the landslide data from interpretation of unmanned plane image. The result indicates 67.01% area of landslide in extremely high and high hazard levels. The structure and function of risk assessment model of multimode system is consistent with the formation mechanism of earthquake-induced landslide, which could avoid and decrease the artificial and random in dividing the evaluation index and risk degree of landslide.

Abstract: As is known, base isolation can reduce earthquake energy that transferred from the ground motion to the structure by buffering it with a bearing layer at the foundation which has relatively low horizontal stiffness. The paper investigates the time history records of a two storied symmetrical steel framed isolated building with Elastomeric Rubber Bearing and Friction Pendulum Systems that under the Northridge earthquake, and the isolator parameters are calculated using the design guidelines of International Building Code (IBC2000) within the spirit of IS 1893–2002(7). And then, contrasting of the roof’s displacements, accelerations and base shear values of the steel framed building with and without isolators, and which studied from the Non-linear time history analysis using structural analysis software SAP2000. The results show that base isolation will provide a substitute technology for the conventional, fixed-base design of structures and cost-effective for new buildings in high seismic regions.

Abstract: Based on the typical overflow dam section of Ahai gravity dam, the cracking calculation was conducted and the crack form was determined, referring to the experimental research result. Then the constraint-function contact algorithm in ADINA was used to study the stability of the upper free body subjected to an earthquake. The analysis results primarily show that the ultimate seismic capacity of Ahai gravity dam is an earthquake whose peak acceleration is between 3.4g and 3.8g.

Abstract: Infill walls,etc. non-load-bearing walls are vulnerable to fracture when these are subjected to out-of-plane seismic loads. Studies suggest that the overall dimensions of non-load-bearing walls are the important parameters to affect its out-of-plane mechanical properties, but most of these researches are qualitative researches, do not give specific size limitations. This paper based on codes has calculated out-of-plane loads of non-load-bearing walls, then bearing capacity check formulas have been deduced when non-load-bearing walls are subjected to out-of-plane seismic loads, finally the size limitations used in the height-thickness ratio check and seismic check are obtained.The conclusions fill up gaps in research of non-load-bearing walls ,and provide reference for the design specifications of non-load-bearing walls.

Abstract: Using the method of combining static reliability and dynamic reliability, this paper converts the calculation of structural seismic reliability to the calculation of probability of the structural response maximum beyond the resistance boundary. Thus exceeding probability analysis of random process is converted to probability characteristic analysis of random variable. According to the above idea the seismic reliability analysis method based on the maximum of seismic response is proposed. The reinforced concrete beam bridge example calculations show that the calculation results of seismic reliability analysis method based on the maximum of seismic response can meet the engineering accuracy requirements.