SHAKING TABLE TESTS OF LOW-RISE CONCRETE WALLS FOR HOUSING
Previous low-rise concrete shear walls tested under cyclic loading and designed to fail in shear, reinforced with 50% of the minimum code prescribed wall reinforcement, exhibited comparable displacement ductility to that of walls reinforced with 100% of the minimum steel ratio, thus enabling them to be used in concrete housing. Nevertheless, walls with 50% of the minimum code prescribed wall reinforcement and reinforced with welded wire meshes exhibited limited displacement ductility. This paper presents results of four 1:1.25 scaled concrete walls tested under shaking table excitation aiming at verifying results from quasi-static cyclic loading. Variables studied were the type of concrete (normalweight and cellular), the wall steel ratio (0.125% and 0.25%) and the type of web reinforcement (deformed bars and welded wire meshes). Wall properties were typical of low-rise housing in Mexico. Axial compressive stress, kept constant during the test, was representative of low-rise housing. In the experimental program it was observed that strength and stiffness degradation is more pronounced and displacement capacity is smaller in walls tested under dynamic than under quasi-static cyclic loading. Therefore, loading rate effect plays an important role in the displacement and energy dissipation capacity of low-rise concrete walls.
shear walls reinforced concrete shaking table test shear failure low-rise housing
W.J. Carrillo S.M. Alcocer
Ph.D Candidate, Universidad Nacional Autónoma de México, UNAM, México, D.F., & Assistant professor, Research professor, Instituto de Ingeniería, Universidad Nacional Autónoma de México, UNAM
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）