In this thesis a practical design tool based on Life-Cycle Cost Analysis (LCCA) is proposed for wind-sensitive structures. A cost-based approach can broaden the perspective of managers and stakeholders in order to choose the best design solution on the basis of the monetary losses expected during the structure lifetime. In this context, an automated and computationally efficient procedure named Life-Cycle Cost Wind Design (LCCWD) is developed for the design of tall structures. All the key aspects related to wind engineering are considered: the characterization of the wind load and of the aerodynamic structural response uncertainty, the probabilistic analysis of non-structural damages, the choice of an effective control system considering technical and economic aspects. The efficiency of the LCCWD approach is demonstrated by making use of a case study of a 180-m high tall building, for which wind tunnel load data are available. The control system consists in a bidirectional TMD, located at the top floor of the building. The structural analysis is carried out in the frequency domain and considers power-law function mode shapes and torsional response. Costs related to both drift-sensitive and acceleration-sensitive non-structural components are evaluated and the beneficial contribution of the TMD in reducing both types of damage is assessed in a Life-Cycle Cost perspective. The main results of the numerical application consist in: 1) to establish the best orientation of the building for the specific geographic area; 2) to determine most appropriate types of nonstructural elements by comparing different cost-based solutions; 3) to provide indications about the possible use of the interior spaces within the height of the building in relation to the distribution of nonstructural components; 4) to estimate the time, called Break-Even Time (BET), after which the initial costs associated with the installation of the control system are recovered, with a consequent significant lifetime costs reduction. The LCCWD is effective and easily adaptable to real applications in order to choose the best cost-based design solution on the basis of different alternatives that will simultaneously meet the need of customers and designers. With the LCCWD it is possible to accept or reject design alternatives and select 'optimal' and technically valid systems or decide for a particular structural control device that meets specific cost-based technical performance.

Life-cycle cost-based design of wind excited tall buildings / Laura Ierimonti. - (2018).

Life-cycle cost-based design of wind excited tall buildings

Laura Ierimonti
2018

Abstract

In this thesis a practical design tool based on Life-Cycle Cost Analysis (LCCA) is proposed for wind-sensitive structures. A cost-based approach can broaden the perspective of managers and stakeholders in order to choose the best design solution on the basis of the monetary losses expected during the structure lifetime. In this context, an automated and computationally efficient procedure named Life-Cycle Cost Wind Design (LCCWD) is developed for the design of tall structures. All the key aspects related to wind engineering are considered: the characterization of the wind load and of the aerodynamic structural response uncertainty, the probabilistic analysis of non-structural damages, the choice of an effective control system considering technical and economic aspects. The efficiency of the LCCWD approach is demonstrated by making use of a case study of a 180-m high tall building, for which wind tunnel load data are available. The control system consists in a bidirectional TMD, located at the top floor of the building. The structural analysis is carried out in the frequency domain and considers power-law function mode shapes and torsional response. Costs related to both drift-sensitive and acceleration-sensitive non-structural components are evaluated and the beneficial contribution of the TMD in reducing both types of damage is assessed in a Life-Cycle Cost perspective. The main results of the numerical application consist in: 1) to establish the best orientation of the building for the specific geographic area; 2) to determine most appropriate types of nonstructural elements by comparing different cost-based solutions; 3) to provide indications about the possible use of the interior spaces within the height of the building in relation to the distribution of nonstructural components; 4) to estimate the time, called Break-Even Time (BET), after which the initial costs associated with the installation of the control system are recovered, with a consequent significant lifetime costs reduction. The LCCWD is effective and easily adaptable to real applications in order to choose the best cost-based design solution on the basis of different alternatives that will simultaneously meet the need of customers and designers. With the LCCWD it is possible to accept or reject design alternatives and select 'optimal' and technically valid systems or decide for a particular structural control device that meets specific cost-based technical performance.
2018
Annibale Luigi Materazzi, Klaus Thiele, Ilaria Venanzi
ITALIA
Laura Ierimonti
File in questo prodotto:
File Dimensione Formato  
Diss_Ierimonti_Laura.pdf

accesso aperto

Descrizione: Tesi di dottorato
Tipologia: Tesi di dottorato
Licenza: Open Access
Dimensione 9.37 MB
Formato Adobe PDF
9.37 MB Adobe PDF

I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1129235
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact