Behaviour of Precast Column Foundation Connection under Reverse Cyclic Loading

Abstract

Precast column foundation connection is one of the critical connections under reverse cyclic loading, and the present study focuses on this connection. Three types of connections were considered, such as (i) base plate connection, (ii) pocket connection, and (iii) grouted sleeve connection. All the above connections were designed, and experimental investigation was carried out on 1 : 2 scaled models by subjecting the column to lateral reverse cyclic loading. Displacement-controlled loading pattern has been adopted for the testing of the specimens. The structural response of the connection was studied for their (i) load-displacement hysteresis behaviour, (ii) stiffness degradation, (iii) energy dissipation, and (iv) ductility. The results were then compared with that of the monolithic connection. The precast connection was more ductile, and the energy dissipated by the pocket connection was high compared to the base plate and grouted sleeve connection. The ductility and the load-carrying of grouted sleeve connection were small compared to other connections. The results of the study showed the precast column foundation can be used in seismic prone areas.

Unified Flexural Resistance Design Method and Evaluation Frame for the B-Regions of RC Flexural Members—Theory and Application

“…E s is the elasticity modulus of steel and is equal to 29,000 ksi. E c is the modulus of elasticity of concrete calculated using Equation (20).…”

“…We obtain Equation (21), where c 1 is the actual distance from the compression edge fibre to the neutral axis of the transformed section as shown in Figure 4: modulus of steel and is equal to 29,000 ksi. Ec is the modulus of elasticity of concrete c culated using Equation (20). 3.…”

“…Then a different method was proposed to assemble precast columns in the foundations. Three types of precast column-foundation connection were designed: the base plate connection, the pocket one, and the grouted sleeve one [20]. Experiments were conducted to study the hysteretic behaviours of scaled models of the connections through lateral cyclic loading tests.…”

The Specificity of Shaping and Execution of Monolithic Pocket Foundations (PF) in Hall Buildings

“…On the other hand, the literature lacks detailed and precise guidelines describing the procedures related to the design and construction of these specific structures. Filling this gap is particularly important as PFs are components of hall buildings, which means that they may be exposed to static, dynamic and fatigue loads [12][13][14][15][16][17][18]. Therefore, inadequate procedures when constructing structural systems in the skeleton hall buildings may result in the formation of primary microcracks in the concrete structure connecting the PF with the column.…”

Experimental investigations of precast concrete column with spliced connections based on ultrahigh‐performance fiber‐reinforced concrete

“…The credible connection between precast column-tofoundation that act as the main load-carrying member is crucial to determining the seismic-resistant performance of precast concrete frames. To date, the popular connection approaches cover the pocket connection, 5,6 grouted sleeve connection, [7][8][9] grouted duct connection, 10,11 and bolted steel plate connection, 12,13 and so forth. Although they were considered the stable and mature connection method, there are also some deficiencies.…”