ABSTRACT

This paper summarizes a study whose primary objectives were to develop a model for nonlinear static analysis of unreinforced masonry (URM) buildings, considering the flexibility of the floor system and analyzing the influence of stiffening the floor system on the overall seismic response of such buildings. With this aim, a six-story building typical of the Eixample-Barcelona district was used as a case study. All the macro-elements, those that constitute the walls and the floor system, were developed with one-dimensional spring elements. The influence of stiffening the floor system was analyzed by applying conventional stiffening interventions to the two-floor systems common in the Eixample-Barcelona district. The overall seismic response was evaluated in terms of modal parameters, the characteristics of the pushover curves and the deformed shape of the floors. The outcomes are discussed in relation to recent studies and explained in the context of previous studies. Finally, in the two unstiffened cases of the prototype building, the stiffening of the floor system slightly increases in fundamental periods, slightly to moderately increases in base shear capacities, and significantly decreases in displacement capacities.

摘要

本文总结了一项研究，其主要目标是开发无钢筋砌体 (URM) 建筑物的非线性静力分析模型，考虑楼板系统的柔韧性并分析楼板系统加劲对此类建筑物的整体地震响应的影响。为此，以巴塞罗那扩展区典型的六层建筑作为案例研究。所有构成墙壁和地板系统的宏观元素都是用一维弹簧元素开发的。通过对 Eixample-Barcelona 区常见的两层楼系统应用传统的加固干预措施，分析了加固楼板系统的影响。根据模态参数评估整体地震响应，Pushover 曲线的特征和楼板的变形形状。这些结果与最近的研究有关，并在先前研究的背景下进行了解释。最后，在原型建筑的两个未加筋情况下，楼板系统的加劲在基本阶段略有增加，基础抗剪能力略有增加，位移能力显着降低。