基于OpenSEES的圬工拱桥内力分析及倒塌过程模拟_彭卫兵.pdf

30 4 Vol.30 No.4 2013 4 Apr. 2013 ENGINEERING MECHANICS 162 1000-4750(2013)04-0162-07 OpenSEES ( 310014) OpenSEES TLFD8nBrick 3D OpenSEES 3D OpenSEES U441 A doi: 10.6052/j.issn.1000-4750.2011.11.0757 THE COLLAPSE SIMULATION AND INTERNAL FORCE ANALYSIS OF A MASONRY ARCH BRIDGE BASED ON OPENSEES PENG Wei-bing , XIONG Zhi-hong , PAN Xiao-dong , ZHAO Qi-lin (College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China) Abstract: This paper studied the distribution and development of axial force, shearing force, and bending moment in the key section of a masonry arch bridge under different horizontal displacements of the left abutment of the bridge by using the sectional internal force integral program. According to the collapse analysis of the masonry arch bridge, the critical stress position was found to lie in the closest arch away from the sliding end of the slipped abutment. Moreover, OpenSEES was used to perform the progressive collapse analysis, in which the large strain TLFD8nBrick element was developed, the 3D solid element was created and the geometrically nonlinear dynamic method was established. Taking the strain as the index of failure, the simulation of the progressive collapse of the masonry arch bridge is performed by modeling the initial damage and using the “killing or activating elements” technology. The results show that this research can effectively reveal the collapse mechanism of the masonry arch bridge. In addition, the further development