Problem Statement A site selected for construction of multistorey building has a layered stratum as shown in figure below. Based on field investigation and laboratory testing, soil A was found to be c- soil, while soil B a clayey soil (-0). The students are required to assume any realistic values against ciệty of soil for making calculations. q = 50 kN/m² Soil A 6 m 3 m H2 Soil B 1) If proposed building load applied at the surface is 50 kN/m2 (as shown in the Fig.), calculate vertical effective stress at the center of clay layer both before and after construction of building. 2) If double basement is planned for the structure with proposed foundation level at 6m from natural ground surface, will it be possible to make a vertical cut without providing any lateral support and keeping a factor of safety 2?

Problem Statement A site selected for construction of multistorey building has a layered stratum as shown in figure below. Based on field investigation and laboratory testing, soil A was found to be c- soil, while soil B a clayey soil (-0). The students are required to assume any realistic values against ciệty of soil for making calculations. q = 50 kN/m² Soil A 6 m 3 m H2 Soil B 1) If proposed building load applied at the surface is 50 kN/m2 (as shown in the Fig.), calculate vertical effective stress at the center of clay layer both before and after construction of building. 2) If double basement is planned for the structure with proposed foundation level at 6m from natural ground surface, will it be possible to make a vertical cut without providing any lateral support and keeping a factor of safety 2?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Connections

In steel structures, connections are the members that join two or more steel members. The connections are the most important members of any steel structure, and hence, they are designed more carefully. The majority of the construction cost of steel structures is incurred due to the connections. The design of connections is done as per the recommendations and specifications of the American Institute of Steel Construction (AISC).

Question

Solve part 1 and part 2 only

Problem Statement
A site selected for construction of multistorey building has a layered stratum as shown in figure below. Based
on field investigation and laboratory testing, soil A was found to be c-o soil, while soil B a clayey soil (=0).
The students are required to assume any realistic values against c/þ/y of soil for making calculations.
q = 50 kN/m²
TIANIAN
Soil A
6 m
3 m
H2
Soil B
1) If proposed building load applied at the surface is 50 kN/m² (as shown in the Fig.), calculate vertical
effective stress at the center of clay layer both before and after construction of building.
2) If double basement is planned for the structure with proposed foundation level at 6m from natural
ground surface, will it be possible to make a vertical cut without providing any lateral support and
keeping a factor of safety 2?
3) If we have to design a smooth rigid retaining wall to support this vertical cut with horizontal top surface,
calculate the magnitude, location and direction of resultant active thrust acting on wall.
4) A machine is to be placed at floor of proposed building. Idealizing the situation as spring-mass system,
building foundation is subjected to a dynamic force of Q = 34.7 sinot with frequency, f= 15.5 Hz and
spring-constant = 72,000 kN/m. If weight of machine plus foundation is 150 kN. Detemine the
maximum and minimum dynamic force transmitted to undermeath soil.

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