This paper describes shaking table tests of three eight-story building models： all are masonry structures in the upper stories, with or without frame-shear walls of one- or two- stories at the bottom. The test result...This paper describes shaking table tests of three eight-story building models： all are masonry structures in the upper stories, with or without frame-shear walls of one- or two- stories at the bottom. The test results of damage characteristics and seismic responses are provided and compared. Then, nonlinear response analyses are conducted to examine the reliability of the dynamic analysis. Finally, many nonlinear response analyses are performed and it is concluded that for relatively hard sites under a certain lateral stiffness ratio （i.e., the ratio of the stiffness of the lowest upper masonry story to that of the frame- shear wall story）, the masonry structure with one-story frame-shear wall at the bottom performs better than a structure built entirely of masonry, and a masonry structure with frame-shear wall of two stories performs better than with one-story frame- shear wall. In relatively soft soil conditions, all three structures have similar performane. In addition, some suggestions that could be helpful for design of masonry structures with ground story of frame-shear wall structure in seismic intensity region VII, such as the appropriate lateral stiffness ratio, shear force increase factor of the frame-shear wall story, and permissible maximum height of the building, are proposed.展开更多
Many people have devoted their professional lives to translating and understanding the artistic narrative told by light, stones, bones, and blood. There is still much we do not understand about the epic saga told by n...Many people have devoted their professional lives to translating and understanding the artistic narrative told by light, stones, bones, and blood. There is still much we do not understand about the epic saga told by nature about creativity and destruction, coherence and surprise, colors and lines, and so much else. But we can read in nature the major chapters of an improbable story about where we came from, how we got here, and what we are made of. The nature-the stories--from which we have emerged have led to our abilities to explicitly imagine, to create more complex and beautiful relationships, or to end our chapter.展开更多
基金China Joint Earthquake Science Foundation Under Grant No. 95034National Science Foundation of China Under Grant No. 5067816
文摘This paper describes shaking table tests of three eight-story building models： all are masonry structures in the upper stories, with or without frame-shear walls of one- or two- stories at the bottom. The test results of damage characteristics and seismic responses are provided and compared. Then, nonlinear response analyses are conducted to examine the reliability of the dynamic analysis. Finally, many nonlinear response analyses are performed and it is concluded that for relatively hard sites under a certain lateral stiffness ratio （i.e., the ratio of the stiffness of the lowest upper masonry story to that of the frame- shear wall story）, the masonry structure with one-story frame-shear wall at the bottom performs better than a structure built entirely of masonry, and a masonry structure with frame-shear wall of two stories performs better than with one-story frame- shear wall. In relatively soft soil conditions, all three structures have similar performane. In addition, some suggestions that could be helpful for design of masonry structures with ground story of frame-shear wall structure in seismic intensity region VII, such as the appropriate lateral stiffness ratio, shear force increase factor of the frame-shear wall story, and permissible maximum height of the building, are proposed.
文摘Many people have devoted their professional lives to translating and understanding the artistic narrative told by light, stones, bones, and blood. There is still much we do not understand about the epic saga told by nature about creativity and destruction, coherence and surprise, colors and lines, and so much else. But we can read in nature the major chapters of an improbable story about where we came from, how we got here, and what we are made of. The nature-the stories--from which we have emerged have led to our abilities to explicitly imagine, to create more complex and beautiful relationships, or to end our chapter.
