Synopsis: The structural design for the East Addition to the St. Cloud Hospital facility in central Minnesota incorporated punching shear and cracked section design criteria that are not currently specified in ACI 318-05. The complexity of the column layout and shallow floor-to-floor spacing were the primary reasons for choosing a twoway 12 in. (300 mm) reinforced concrete flat slab for the 450...

Taking hydraulic punching test of Zhaozhuang Mine as engineering background, by comparing the field application effects different processes, relationship between coal moisture content around borehole blockage and gas extraction effect was monitored analyzed. The following conclusions were drawn: occurrence result comprehensive action slag particle size discharge capacity return water. Blocking ...

Many building codes rely on empirical formulations with respect to the punching shear design provisions. Such empirical equations are typically calibrated on the basis of laboratory tests performed on simplified geometries (usually isolated specimens) with usually statically-determined loading conditions. On the contrary, actual structures, particularly two-way slabs, are continuous and highly ...

BACKGROUND The aim of the study was to answer the question of whether earplugs provide sufficient protection in the exposure to impulse noise generated during metalworking processes. MATERIAL AND METHODS The noise generated by die forging hammer and punching machine was characterized. Using an acoustic test fixture, noise parameters (LCpeak, LAmax) under 24 earplugs, foam, winged and no-roll,...

SYMPOSIUM PROCEEDINGS 1970 The aids to easy and accurate punching are twofold. For as many programmes as practicable, proformas are prepared whcre card columns arc idcntified and the entries to be made in each group of columns corresponding to the value of a variable are clearly defined. Fig. 3 gives a typical proforma used for the closed circuit respiration chamber programme, CCRC3. Note that ...

Programmable logic sequential pneumatic system is developed for mechanical applications, like sealing, name punching, plate designing, etc. punching machine considered as inevitable in almost all the industries mechanical, electronic, food and automobile, To print hallmarks, logos a brand. In respect to reducing processing time by upgrading conventional automation integrating with control (PLC)...

A number of theoretical problems are discovered in the application of degenerated models in punching process of ballistic shields. Insufficient knowledge of dynamic behavi ours of these models based on non-linear complex constitutive materials or combination of mixed rheological Maxwell models with linear elastic elements or dissipative is the main reason of the problems. In the engineering app...

Flat slabs in contemporary buildings are most commonly supported by rectangular cross-section columns. Research of columns for punching is rather narrow. The purpose this work was the experimental research and adjustment their design method. Reinforced concrete 6 cm thickness without transverse reinforcement were used as testing specimens. During tests load on slab transferred using stamps. Sid...

A finite element model (FEM) was constructed using specialized three-dimensional (3D) software to investigate the punching shear behavior of interior slab-column connections subjected to a moment-to-shear ratio of 0.15 m. The FEM was then verified against the experimental results of full-scale interior slab-column connections reinforced with glass fiber reinforcement polymer (GFRP) bars previou...