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Study on Anti-seismic Collapse of RC Frame Structures with First Floor Open and Masonry Infills

Author: ChenHuiMing
Tutor: ChengZhiHui
School: South China University of Technology
Course: Disaster Prevention and Reduction Engineering and Protective Engineering
Keywords: Wenchuan earthquake Filling wall model Seismic Collapse Resistance Overhead layer Direct displacement
CLC: TU352.11
Type: Master's thesis
Year: 2011
Downloads: 114
Quote: 2
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Abstract


May 12, 2008 Wenchuan 8.0 Richter earthquake epicenter in Wenchuan County Town, maximum intensity of 11 degrees, the focal depth of 14km, the Wenchuan earthquake in China since the founding of the strongest earthquake. The earthquake caused a total of 69,227 people were killed and 374,643 people were injured, 17,923 missing, and the direct economic losses of 845.1 billion yuan. Infilled Frame Structures damage is very widespread phenomenon, especially a lot of the underlying layer overhead infilled frames structure appears at the bottom of the \a serious threat caused to people's psychological shadow. Masonry infill walls as a non-structural elements, the lateral load resistance of the research have long attracted the attention of domestic and foreign engineering community. Traditional design is often filled wall is equivalent to the beam loading, ignore the the filled wall stiffness effect factors, showed that the earthquake damage the filled wall stiffness and other factors have a great impact on the seismic performance of the frame structure, must be taken seriously. Layer model, in order to study the influence of infill walls on the seismic performance of frame structure, combined example base shear method of filling wall frame structure analysis calculated for analysis after considering the impact of infill walls of the frame house in the mass, stiffness, vibration period and displacement dynamic performance at different compared to the pure frame structure, summarized the the filler wall on the other effects of the seismic performance of the framework structure. Infilled Frame Structures numerical analysis, the need to fill the wall for a reasonable and effective computing model, this paper summarizes already filled wall geometrical model, through the analysis and comparison of selected software SeismoStruct equivalent The lever model as filled wall geometrical model. By simulating the existing test, the comparison of experimental data and numerical results prove the rationality of the model parameters. Infilled Frame Structures using two calculation methods to quantitatively assess the underlying overhead anti-seismic collapse capacity under strong earthquakes, 1) analysis software SeismoStruct nonlinear static analysis infill walls on the bottom overhead frame structure, with the structure of ultra- strong coefficient and structural deformation capacity coefficient to quantitatively evaluate the structure of anti-the earthquake collapsed ability; 2) analysis software SeismoStruct nonlinear dynamic analysis of the infill walls frame structure of the underlying overhead to quantify the rate of structural collapse assessment structure anti-earthquake collapsed. Learned that an existing low-level aerial structure infilled frames anti-earthquake collapsed the ability to be further enhanced by a numerical example. By using the lateral displacement curve inverted triangle distribution the variable stiffness shear loads cantilever rod to simulate lateral displacement curves have infilled frames overhead layer structure and the derivation of the expression for the aerial layer infilled frames structure is directly based on the displacement of the anti-earthquake collapsed the design and evaluation of checking, and using this method to treat the construction of the structure as well as the existing structure to the design and evaluation of anti-earthquake collapsed checking on the practicality and effectiveness of the proposed method.

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CLC: > Industrial Technology > Building Science > Building structure > Special Structure > Anti - shock structure,disaster prevention structures > Shock, isolation, and explosion-proof structure > Seismic structure
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