Asif Husain

• Ph. D.
• Professor at Jamia Millia Islamia

Unreinforced masonry (URM) walls carry axial loads and do have openings. Variation in the axial load and location of opening are not uncommon in masonry buildings. To investigate the response of URM walls carrying varying axial load and location of opening, wall with dimension 5000 mm × 3010 mm × 230 mm that carries axial load of 51, 30, and 9 kN/m...

In this study, we have created a microscopic model of an unreinforced clay brick masonry wall, 5 m × 2.80 m × 0.23 m. The wall is braced with two RCC columns having nominal reinforcement. The main focus is to examine the behavior of the wall when imperilled to near-field blast, while varying the axial compression. Three walls have been simulated us...

In recent years, the escalation of global incidents involving explosives has engendered profound concern, driven by both deliberate acts of subversion and unintended detonations. Notably, the catastrophic explosion at the fireworks storage facilities in Beirut, Lebanon, stands as a poignant example, leading to substantial loss of life, injuries, an...

In the realm of construction engineering, brick masonry stands out as a pivotal structural element, renowned for its widespread application. Given the load-bearing nature of masonry structures, the ramifications of wall failure under extreme loads induced by explosions are profound. Particularly concerning is the out-of-plane failure of walls, whic...

In this research paper, the focus is on studying the Dangerous zone of failure in concrete voided slabs. Voided slabs depict dangerous zones as conventional slabs. Voided slab, being the innovative method of building slabs that replaces failed concrete in the middle of the slab with a hollow sphere—known as Bubble Deck—has numerous advantages. Thes...

These days, several research projects examine the impact of voids in concrete components, particularly in voided slabs. The idea behind voided concrete slabs is to replace inactive concrete with hollow plastic shapes to reduce the amount of concrete used without compromising the functionality of the features. Numerous systems use this idea, includi...

Reinforced concrete is becoming a common building material due to urbanization and rising infrastructure needs. Large member sizes are provided by traditional design techniques to meet structural requirements. Significant structural components like slabs, beams, columns, foundations, and many more impact how much concrete and steel are used in cons...

Durable concrete significantly reduces the spalling caused by chemical damage. The objective of current research is to substitute cement with supplementary such as fly ash (FA), ground granulated blast furnace slag (GGBS), and alccofine (AF). Additionally, the impact of nano-silica (NS) and silica fumes (SF) on the GPC durability when cured at vari...

Nowadays, several research activities study the effect of voids in concrete elements, especially voided slabs. The concept of voided concrete slabs depends on removing inactive substantial parts without affecting the performance of the features—the achievement of reduction of the use of concrete by replacing inactive concrete with hollow plastic fo...

The increased urbanization and consequent requirement for infrastructure accelerate the usage of concrete as a building material. Traditional design practices require large member sizes to meet architectural and structural criteria. As a result, the size of structural parts such as a slab, beam, column, and so on significantly impacts the amount of...

The present study focuses on how best can we enhance the blast resistance of reinforced concrete (RC) columns of an existing building. For this purpose, an RC column, 300mm x 300mm x 3000mm, carrying an axial compression of 950kN subjected to the 82kg-TNT explosive loading is first analyzed using the ABAQUS software. Strain rate effect on the concr...

Concrete is a combination of cement, sand, aggregate, and water. Cement manufacturing causes the generation of various gases, mainly greenhouse gases like CO2 in the atmosphere. This CO2 is the leading cause of global warming, so it becomes essential to find a replacement for cement in the construction industry and use more eco-friendly constructio...

Concrete is a combination of cement, sand, aggregate, and water. Cement manufacturing causes the generation of various gases, mainly greenhouse gases like CO2 in the atmosphere. This CO2 is the leading cause of global warming, so it becomes essential to find a replacement for cement in the construction industry and use more eco-friendly constructio...

Blasts and accidental explosions are being reported more frequently than before with grievous injuries and loss of lives and damage to the structure, increasing the concern of disaster management authority officials. Structural engineers apprehend that such events may trigger progressive structural collapse leading to huge loss of property and its...

Occurrence of extreme loadings on the structure caused by man-made or accidental explosions is not uncommon. Such loadings jeopardize the safety/stability of structure if the key load-carrying member(s) are damaged. Strengthening of compression members of the buildings which is more vulnerable to blast loading may be required, and therefore, is of...

In the past few decades, the world is experiencing a number of frequent and unanticipated blast explosions. Property loss and casualties caused by these blasts are of great concern to state authorities and are of sufficient interest to the structural engineers and researchers. A common structural member in the buildings used for both commercial and...

The use of construction materials has risen as culture and technology have grown. Concrete is the most often used of all the essential construction materials. To meet structural specifications, traditional architecture approaches include participants with large sizes. These massive structural elements including columns, slabs, beams, footings, part...

The present paper intends to standardize the miniature test results obtained from the testing of a ring shaped miniature specimen having a V notch placed at diametrically opposite ends of the ring. The rings of 0.5mm, 0.8mm and 1.0mm thickness were sliced from these circular rods on EDM wire cut machines. A V-shaped notch of 1mm depth and 60° angle...

Dynamic characteristics of setback frames building are different from regular frame building structures in this regards various experimental studies have been conducted and ascertain method of improving their performance to understand the behaviour of setback building. In this work various types of setback frame structures are tested. Seismic respo...

The microstructural and metallurgical changes due to high temperature and high pressure applications, irradiations etc. cause a significant degradation of the mechanical properties of materials in refinery industries, nuclear industries, power plants, oil and gas pipe lines, aging aircrafts etc. That's why materials of in-service components in thes...

Small punch test technique on circular shape of diminutive specimen is considered in the present study. The small punch tests are conducted on diminutive specimen of circular shaped. Four different steels are chosen for this purpose. The load on diminutive samples is quasi-statically applied using different tip diameters hemispherical headed indent...

The paper presents a non conventional technique to predict the constitutive behavior of materials by assessing the true stress–true strain relationship through miniature specimen tests. The miniature test was conducted on two different types of steel ring specimens (outer diameter14mm, inner diameter 8mm, thickeness 0.5mm) with V-notch (1mm depth)...

This paper describes an approach to identify the mechanical properties i.e. fracture and yield strength of steels. The study involves the FE simulation of shear punch test for various miniature specimens thickness ranging from 0.20mm to 0.80mm for four different steels using ABAQUS code. The experimental method of the miniature shear punch test is...

This paper is devoted to a literature review of small (miniature) specimen test techniques, as employed on irradiated materials or otherwise for the determination of mechanical behaviour or different mechanical properties of in-service engineering components. The important developments in techniques for analysis of mechanical behaviour of metallic...

The influence of diameter of rigid hemispherical-headed punches on a circular disk shaped miniature specimen of medium carbon steel has been investigated, in the small punch test. A 3-D finite-element model carried out the computation of the elastic-plastic solution of different hemispherical rigid punches. The three hemispherical-headed punches we...

The present study deals with finite element analysis (FEA) and reliability assessment of spherical LPG storage tank. Finite element analysis is carried out to determine the maximum deflection and stress distribution in the tank. The shell and beam materials are assumed to fallow the Von-Misses yield criterion. The elastic bucking of spherical stora...