摘要:

This paper describes the derivation of macro construction contract price models that are based on the economic theory of demand and supply using OLS multiple regression analysis.

ISSN:0263-0257    

DOI:10.1080/02630259308970129

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

A theory of structural vulnerability is developed and presented in two linked papers, initially for two dimensional frame structures. The purpose of the theory is to enable the identification of the most vulnerable parts of a structural system so that they may be suitably protected and monitored. In Part 1 a graph model is used to analyse various load paths and loops within a structure. The most important new concept presented is that of a structural ring. A structural system is represented at various hierarchical levels of definition in terms of clusters of structural rings. A measure of the quality of well-formedness of structural rings and clusters is developed which in Part 2 will be used as a quantitative estimate of structural vulnerability.

ISSN:0263-0257    

DOI:10.1080/02630259308970130

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

A theory of structural vulnerability is developed, in two linked papers, initially for two dimensional frame structures. The purpose of the theory is to enable the identification of the most vulnerable parts of a structural system so that they may be suitably protected and monitored. In Part 1 a graph model was used to analyse various load paths and loops within a structure based on the new concept of a structural ring. In this paper a deterioration hierarchy of structural rings shows all possible ways in which a structural ring can deteriorate into a mechanism. A failure scenario is described in terms of deteriorating events and a measure of the effort required, the damage demand, introduced. Three particular types of failure scenario are discussed and related to the concept of robustness.

ISSN:0263-0257    

DOI:10.1080/02630259308970131

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

In this paper, we invoke system theoretic principles and matrix calculus to build higher-order sensitivity models. The approach clarifies and generalizes many of the procedures used in finite element models at present. There are three key features of the work: higher-order sensitivity models in a transformed space of basic variables are found routinely, row and column sensitivities are found without the superfluous notion of the adjoint system, and, the approach is computer worthy. The work has applications in linear and nonlinear networks, structures and finite element models, and FORM and SORM structural reliability. A detailed analysis of a simple truss problem is presented.

ISSN:0263-0257    

DOI:10.1080/02630259308970132

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

ISSN:0263-0257    

DOI:10.1080/02630259308970133

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor