The impact of blast load is always taken into consideration in significant building and protective construction. In order to study the mechanical behavior of the concrete slab under blast load, the dynamic responses of a square concrete slab under surface explosion are simulated by the nonlinear finite element program ANSYS/LS-DYNA. The JOHNSON_HOLMQUIST_CONCRETE model is used for concrete material and the damage and strain rate effect are considered in this mode1. The simplified exponential load is used as blast load. The Z-displacement,Mises effective stress and damage state of concrete slab under different blast load of corresponding scaled distance are investigated and discussed. It can be found from the results that the influence of blast pressure can be neglected when scaled distance is around 2.0 and the damage of slab is beginning from the edge.
Construction project management informatization (CPMI) is an effective application of information technology in the construction project management and in line with the requirements of the construction industry informatization development by the Ministry of Construction. However these is still no very effective methods and standards for measuring and evaluating CPMI level. Taking advantage of software managing capability maturity model, combining with the characteristics of construction engineering project, this paper will design maturity standards of CPMI and also CPMI evaluating model with multi indicators; at the same time the entropy weight fuzzy comprehensive evaluation method will be used for evaluating.
Hydraulic method for earthwork excavation construction technology has a strong advantage in small environmental pollution, low cost, simple process, energy saving. It follows the idea of a harmonious society and the sustainable development, in line with the energy saving and emission reduction policy that the state promoted and also saving cost. This paper put emphasis on the theory of hydraulic method for earth excavation construction technology, construction process and key operation points, and the problems frequently encountered in construction and countermeasures. Combining with the project in Xinxiang new plain area in Henan province, which is about taking advantage of Yellow River to develop agriculture, the paper illustrates the economic benefit and social benefit of this construction technology.
In this paper, important buildings of different structure in Xichang are calculated by using the powerful design software PKPM. First, the drawings of the buildings are simplified and the structure forms are input the computer in PMCAD software interface to make model, and the comprehensive seismic capacity index of floors or the story drift angle are calculated. Then, according to the judging principle, the earthquake damage level is gotten.
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