Diaphragms are essential structural elements of the earthquake-resisting system in a building.Diaphragms are the building slabs subjected to in-plane forces which are transferred to the vertical elements of the earthq...Diaphragms are essential structural elements of the earthquake-resisting system in a building.Diaphragms are the building slabs subjected to in-plane forces which are transferred to the vertical elements of the earthquakeresisting system.In-plane forces can arise from inertial loads and from self-equilibrating forces caused by the interaction between elements of the vertical earthquake-resisting system of different stiffness.The analysis and design of diaphragms is one of the most challenging tasks in design of buildings nowadays.This paper describes a stringer-panel model used as a macro-element for the modeling of building diaphragms in linear and nonlinear time-history analyses.The element was coded in the open-sourcefinite element software OpenSees.The linear version of the element isfirst used to support the design of diaphragms in a building.Then,the nonlinear response of the diaphragms is assessed with the nonlinear version of the element.Key response parameters of diaphragms modeled with the dynamic stringer-panel method in a high-rise building of complex geometry are presented.Results show significant redistribution of internal forces occurs through the diaphragm after cracking,leading to a general reduction of the tensile forces and an increase in the compressive forces.The clear load path,computational stability,effciency,and highly design-oriented representation of the results of this method make it an attractive alternative for its use in the modeling and design of diaphragms in performance-based seismic design.展开更多
基金the constructive comments from the anonymous reviewers.Thefirst author would like to gratefully acknowledge thefinancial support provided by Consejo Nacional de Ciencia y Tecnología(CONACYT),the UC Institute for Mexico and the United States(UC MEXUS)and the program Becas Fulbright-García Robles(COMEXUS).
文摘Diaphragms are essential structural elements of the earthquake-resisting system in a building.Diaphragms are the building slabs subjected to in-plane forces which are transferred to the vertical elements of the earthquakeresisting system.In-plane forces can arise from inertial loads and from self-equilibrating forces caused by the interaction between elements of the vertical earthquake-resisting system of different stiffness.The analysis and design of diaphragms is one of the most challenging tasks in design of buildings nowadays.This paper describes a stringer-panel model used as a macro-element for the modeling of building diaphragms in linear and nonlinear time-history analyses.The element was coded in the open-sourcefinite element software OpenSees.The linear version of the element isfirst used to support the design of diaphragms in a building.Then,the nonlinear response of the diaphragms is assessed with the nonlinear version of the element.Key response parameters of diaphragms modeled with the dynamic stringer-panel method in a high-rise building of complex geometry are presented.Results show significant redistribution of internal forces occurs through the diaphragm after cracking,leading to a general reduction of the tensile forces and an increase in the compressive forces.The clear load path,computational stability,effciency,and highly design-oriented representation of the results of this method make it an attractive alternative for its use in the modeling and design of diaphragms in performance-based seismic design.
