The paper presents the comparison of the results of nonlinear static analyses carried out using six software packages (SWs) available at professional level and operating in the field of the equivalent frame (EF) approach on a model representative of a complex masonry building. The structure is inspired by the school “P. Capuzi” in Visso (MC, Italy), proposed as one of the benchmark structures in the “URM nonlinear modelling—Benchmark project” funded by the Italian Department of Civil Protection within the context of the ReLUIS projects. The 2-stories building is characterized by an irregular T-shaped plan and load-bearing walls consisting of two-leaf stone masonry with a rather regular bond scheme. The school was severely damaged by the seismic sequence that hit Central Italy in 2016/2017 and essentially exhibited a global in-plane box-type response, with a clear evidence of cracks concentrated in piers and spandrels. The availability of an accurate survey of the crack extension represents a precious and rare reference to firstly address in the paper the rules to be adopted in the EF models for the definition of the structural elements geometry. Then, the comparison of results is made with a twofold aim: firstly, by setting the models adopting shared and consistent modelling assumptions across the SWs; secondly, by investigating the sensitivity of the seismic response to some common epistemic and modelling uncertainties (namely: the adoption of various EF idealization rules for walls, the out-of-plane contribution of piers, the flange effect). In both cases, results are post-processed to define reference values of the achievable dispersion. The comparison is carried out in relation to a wide set of parameters, namely: global parameters (e.g. dynamic properties, pushover curves and equivalent bilinear curves); synthetic parameters of the structural safety (i.e. the maximum acceleration compatible with the ultimate limit state); the damage pattern simulated by SWs.

本文介绍了使用专业级可用的六个软件包 (SW) 和在等效框架 (EF) 方法领域对代表复杂砌体建筑的模型进行操作的非线性静态分析结果的比较。该结构的灵感来自学校“P. Capuzi” in Visso（意大利 MC），作为“ URM 非线性建模”中的基准结构之一被提出——基准项目”由意大利民防部在 ReLUIS 项目的背景下资助。这座 2 层建筑的特点是不规则的 T 形平面和承重墙，由两叶石砌体和相当规则的粘结方案组成。学校在 2016/2017 年袭击意大利中部的地震序列中受到严重破坏，基本上表现出全球平面箱型响应，裂缝集中在桥墩和拱肩上的明显证据。裂纹扩展的准确测量的可用性代表了宝贵而罕见的参考，首先在论文中解决了 EF 模型中用于定义结构元素几何形状的规则。然后，结果的比较有两个目的：首先，通过在 SW 之间采用共享和一致的建模假设来设置模型；其次，通过研究地震响应对一些常见认知和建模不确定性的敏感性（即：对墙采用各种 EF 理想化规则、桥墩的平面外贡献、翼缘效应）。在这两种情况下，都会对结果进行后处理以定义可实现色散的参考值。比较涉及一系列广泛的参数，即： 全局参数（例如动态特性、Pushover 曲线和等效双线性曲线）；结构安全的综合参数（即与极限状态兼容的最大加速度）；SWs 模拟的损伤模式。通过研究地震响应对一些常见认知和建模不确定性的敏感性（即：对墙采用各种 EF 理想化规则、桥墩的平面外贡献、翼缘效应）。在这两种情况下，都会对结果进行后处理以定义可实现色散的参考值。比较涉及一系列广泛的参数，即： 全局参数（例如动态特性、Pushover 曲线和等效双线性曲线）；结构安全的综合参数（即与极限状态兼容的最大加速度）；SWs 模拟的损伤模式。通过研究地震响应对一些常见认知和建模不确定性的敏感性（即：对墙采用各种 EF 理想化规则、桥墩的平面外贡献、翼缘效应）。在这两种情况下，都会对结果进行后处理以定义可实现色散的参考值。比较涉及一系列广泛的参数，即： 全局参数（例如动态特性、Pushover 曲线和等效双线性曲线）；结构安全的综合参数（即与极限状态兼容的最大加速度）；SWs 模拟的损伤模式。在这两种情况下，都会对结果进行后处理以定义可实现色散的参考值。比较涉及一系列广泛的参数，即： 全局参数（例如动态特性、Pushover 曲线和等效双线性曲线）；结构安全的综合参数（即与极限状态兼容的最大加速度）；SWs 模拟的损伤模式。在这两种情况下，都会对结果进行后处理以定义可实现色散的参考值。比较涉及一系列广泛的参数，即： 全局参数（例如动态特性、Pushover 曲线和等效双线性曲线）；结构安全的综合参数（即与极限状态兼容的最大加速度）；SWs 模拟的损伤模式。