For the stress analysis of ultra-thin structures, the modeling of conventional domain solution techniques will require a tremendous amount of domain elements, whose aspect ratios must have orders close to unity. Due to this reason, past research work by the finite element method seldom investigated ultra-thin layers of composites. This article proposes a boundary element approach that may yield accurate stress analysis by coarse mesh-modeling for ultra-thin layers of multilayered composites subjected to inertial loads. In this article, the nearly singular integrals in the boundary integral equations for displacements and strains are analytically integrated. The algorithm has been successfully implemented in an existing computer program based on quadratic elements.

This paper makes a case study of an elementary school in Feng-shan District, Kaohsiung City. According to “The handbook of seismic resistant evaluation standard for school buildings” issued by National Center for Research on Earthquake Engineering (NCREE) in 2009, this study analyzes elementary school building adopting braced steel frame retrofit system, conducts seismic evaluation, as well as compares its seismic performance with shear-wall retrofit structure and RC strengthening of columns . If space permits, braced steel frame retrofit system can be applied into school building retrofit scheme; its seismic performance is compared with shear wall and RC strengthening of columns proposals. Adopting shear wall or RC strengthening of columns retrofit would affect main structure system of school building. These constructions will make existing reinforced concrete school building crack, especially old school building whose structure strength is greatly influenced. Therefore, an economic braced portal frame systems are proposed as new way of retrofitting. This paper uses ETABS program to make a seismic evaluation for structural system of the study object. It also compares the research object with commonly-used shear wall retrofit and RC strengthening of columns retrofit, thus to judge whether it meets requirements stipulated in seismic standards issued by NCREE and provide an another alternative scheme for the primary school retrofit construction.

This study developed municipal green roof promotion strategies by reviewing successful green roof initiatives of the international municipalities. This paper consists of three major parts: the first introduced some green roof initiative policies in some cities. The second part of this paper employs the key findings of some municipal governments have set green roof policies and program to assist the government policy makers can better determine which policies suit their needs. The third part of this paper is to propose some green roof promotion strategies for the municipalities to pursue the goals of energy-saving carbon reduction and ecological-compensation for the cities.

Drilled, cold expanded with ring indented method was employed for crack-tip on the both sides and front side of the specimens, thus build up the residual compressive stresses, strain hardening and plasticity induced closure, and lead toward crack growth retardation. The compact tension specimens of AISI 304 stainless steel were used drilled, cold expanded with ring indented in the fatigue test. The experimental methods were drilled (Φ=2mm ) and cold expanded (Φ=2.074mm) and both sides at 2mm and 1mm position of the crack-tip in the specimen, then apply 0kN, 6KN, and 9kN test loads, respectively. The experimental results showed that, for the same test position, the number of delay cycles result from cold expanded than that of drilled and the number of delay cycles are 220798. For the same position, the stronger test load is, the greater crack growth retardation effect is. And, This study proposed some useful information on utilizing cold expanded with ring indented method for AISI 304 Stainless Steel crack growth retardation.